Author Archive

Using MyronLMeters.com

Posted by 28 May, 2014

Tweet  Use MyronLMeters.com Wisely We have a lot to offer (if you know where to look) MyronLMeters.com can tell you most of what you need to know…if you know where to look,  Want to know how to calibrate? Take a look in our videos OR manuals section. Want to send a meter in for repair? […]

 

Use MyronLMeters.com Wisely

We have a lot to offer (if you know where to look)

MyronLMeters.com can tell you most of what you need to know…if you know where to look,  Want to know how to calibrate? Take a look in our videos OR manuals section. Want to send a meter in for repair? Click on the REPAIRS tab and you’ll find out how. Have a discontinued product?  We can tell you the new part number. Don’t know what solutions to use – there are several places you can find them.

Keep this email handy for reference and it will save you a phone call. Also, if you have suggestions to improve our website, please let us know! We want to make MyronLMeters,com as easy to use as the meters we sell.

 

Click this image on the home page OR click the OPERATIONS MANUALS page and you’ll find not only operations manuals, but material safety data sheets for solutions, product datasheets, and application bulletins.

 

Click this image on the home page OR click the REPAIRS tab and you’ll find out how to send your meter in for repair or calibration AND some of the most popular repair videos.

 

Click this image on the Myron L Meters home page OR click the VIDEOS tab OR visit our YOUTUBE channel and view the latest product overview and maintenance videos.

 

Click this image on our home page OR click TECHNICAL SUPPORT at the top of the home page and you’ll find Frequently Asked Questions, a handy contact form, links to MANUALS, REPAIRS, VIDEOS, terms, discontinued products, conversion charts and industry applications.

 

Want to know how to CALIBRATE? Check the OPERATIONS MANUALS page for your meter and open or download OR check out our VIDEOS OR search our BLOG for calibration. Check your OPERATIONS MANUAL for the proper solution.

 

Need help finding a product? Browse our sections on the HOME PAGE OR click PRODUCTS to search by category or parameter OR use the SEARCH box in the upper right of the page.

 

 

Categories : Company News, MyronLMeters.com Service

Meter Maintenance: Myron L Meters

Posted by 13 May, 2014

Tweet  Protect Your Ultrameter With Regular Maintenance When you spend a thousand bucks for a meter, you want it to last. That’s why you bought a Myron L meter in the first place. And, while Myron L meters are renowned for durability, they need care: cleaning, calibration, storage solution, sensor replacement, and sometimes repair. Keep […]

 


Protect Your Ultrameter

With Regular Maintenance

When you spend a thousand bucks for a meter, you want it to last. That’s why you bought a Myron L meter in the first place. And, while Myron L meters are renowned for durability, they need care: cleaning, calibration, storage solution, sensor replacement, and sometimes repair. Keep this blog post as a handy reference guide to Myron L meter maintenance.



Maintenance of the Ultrameter 6PFCE
These procedures apply to the Ultrameter, PoolPro, TechPro, and D-6 Dialysate meter. 

 READ MORE ABOUT ULTRAMETER CARE

DOWNLOAD AN OPERATIONS MANUAL

pH Calibration of the Ultrameter 6PFCE
This procedure applies to the Ultrameter, PoolPro, TechPro, and D-6 Dialysate meter. 

READ HOW TO CALIBRATE

BUY PH BUFFER SOLUTIONS

VIDEO: Ultrameter II Cleaning the pH Sensor

BUY SENSOR STORAGE SOLUTION

VIDEO: Ultrameter II Replacing the pH Sensor

 

BUY A REPLACEMENT PH SENSOR

Repair And Maintenance of Myron L Meters

Need to have your meter repaired?
READ HOW TO SEND YOUR METER FOR REPAIR

Time to get a new meter?

GET YOUR NEW ULTRAMETER HERE
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Myron L Meters

3460 Marron Road #103-341

Oceanside, CA 92056

 

 

Categories : Care and Maintenance, MyronLMeters.com Service, Technical Tips, Videos

UltraEasy Ultrapens: Myron L Meters

Posted by 7 May, 2014

Tweet  Make your work life UltraEasy. The Benefits of an Ultrapen Portable, Durable, Accurate, and Easy Perfect for field testing. Same accuracy and range as an Ultrameter. Tough. Light. Use as backup for your Ultrameter, or as field replacement. Click Here to Find Your Ultrapen Now Your Ultrapen Options Ultrapens: PT1 (Conductivity, TDS, Salinity), PT2 (pH), […]

 


Make your work life UltraEasy.



The Benefits of an Ultrapen

Portable, Durable, Accurate, and Easy

Perfect for field testing.
Same accuracy and range as an Ultrameter.
Tough.
Light.
Use as backup for your Ultrameter, or as field replacement.

Click Here to Find Your Ultrapen Now


Your Ultrapen Options

Ultrapens: PT1 (Conductivity, TDS, Salinity), PT2 (pH), PT3 (ORP), PT4 (Free Chlorine)

Ultrapen Sets: The Ultrapen Combo (1&2), The Ultrapen Set (1,2,3), The Ultrapen Complete (1,2,3,4), The Ultrapen Splash (for pool pros:1,2,4)

Ultrapen PT1 Product Overview – MyronLMeters.com

Ultrapen PT2 pH Pen Product Overview – MyronLMeters.com

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Our mailing address is:

Myron L Meters

3460 Marron Road #103-341

Oceanside, CA 92056

 

Categories : Product Updates, Videos

Real-Time Field Water Analysis with an Ultrameter III 9P: Myron L Meters

Posted by 30 Apr, 2014

Tweet The Ultrameter III 9P Titration Kit allows for fast, accurate alkalinity, hardness & LSI titrations in the field. The Ultrameter III 9P is based on the tried and tested design of the Ultrameter II 6P and measures conductivity, resistivity, TDS, pH, ORP, free chlorine and temperature quickly and accurately. The 9P also features new […]

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The Ultrameter III 9P Titration Kit allows for fast, accurate alkalinity, hardness & LSI titrations in the field.

The Ultrameter III 9P is based on the tried and tested design of the Ultrameter II 6P and measures conductivity, resistivity, TDS, pH, ORP, free chlorine and temperature quickly and accurately. The 9P also features new parameters that allow the user to perform titrations in the field. The Ultrameter III 9P has a unique method of performing alkalinity, hardness and LSI titrations that makes field monitoring fast and feasible.

How does it work?

The 9P titrations are based on conductometric titration methods that are possible with the 9P’s advanced conductivity cell and microprocessor based design. Titrations are chemically equivalent to standard methods using colorimetric techniques, but replace color change identification of equivalence points with changes in conductivity, thereby replacing a subjective, qualitative assessment with a quantitative one. This means the instrument determines the equivalence point instead of the user and the method of analyzing the equivalence point is objective, rather than subjective.

What is a conductometric titration?

A conductometric titration is performed just like a colorimetric titration, only the equivalence point is determined by a change in conductivity rather than a change in color. This is based on the fact that changes in ionic concentration that occur as constituents react with reagents change the electrical conductivity of the solution.

A simple example can be given of the titration of a strong acid with a strong base. The acid solution, before the addition of the base, has a very high conductance owing to the concentration and mobility of the small hydrogen ions.

With the addition of the base, the hydroxide reacts with the hydrogen to form water, thus reducing the hydrogen ion concentration and effectively lowering the conductivity of the solution. The conductivity continues to decrease until all the hydrogen ions are consumed in the reaction, but then sharply increases with the next addition of base, which contains highly conductive hydroxide ions. The solution conductivity then continues to increase with each base addition. The equivalence point in this example would be a clearly defined minimum point of lowest conductivity (see Figure 2).

Not all solutions will give a plot with an equivalence point that is as easy to distinguish as the sharp upturn found in a strong acid-base titration, however. The 9P plots several reagent additions beyond any changes in conductivity and matches the derived curve to the behavior of solutions of known concentration.

Is a conductometric titration a standard method?

(Standard method comparison to methods listed in the Standard Methods for the Examination of Water and Wastewater published by the American Public Health Assn., the American WaterWorks Assn. and the Water Environment Assn.)

Myron L’s conductometric titration methods are chemically equivalent to standard methods that use the same procedure, but with pH indicators. That means that they use the same reagents in the same sequence with the same theoretical approach. The difference lies in the 9P’s ability to determine the equivalence point based on numerical data, rather than subjective observation of a color change.

The alkalinity titration is modeled after standard method 2320. The sample is titrated with sulfuric acid and conductivity changes are recorded at each titration point.

The hardness titration is modeled after standard method 2340. To reduce the affects of high alkalinity in the form of bicarbonate, acid is first added to the sample. This shifts the bicarbonate toward carbonic acid, then carbon dioxide (reference the carbonic acid equilibrium), which is gassed off the sample. The sample is buffered above pH 10 (effectively pH 12) by the addition of sodium hydroxide. EDTA reagent is then added incrementally, with conductivity measured after each addition.

The LSI titration uses a simplified version of the thermodynamic equations for the determination of the scaling tendency of water developed in 1936 by Dr. Wilfred Langelier. The user simply titrates for alkalinity and hardness, then measures pH and temperature, and the 9P generates the saturation index value automatically.

Conductometric vs. Colorimetric

The benefits of determining the equivalence points by conductometric titrations are that the user does not have to interpret any results. The 9P does it for you using objective measurements. And the 9P is a faster method. For example, a typical colorimetric titration for hardness can take up to 30 drops of reagent, while the 9P method for the same concentration only requires six to eight drops. Colorimetric distinctions are sometimes hard to make, as well, especially when adding reagents drop by drop while trying to carefully observe the precise point at which the color changes—and that can lead to inaccurate data. This is especially true in colored or turbid solutions.

The conductometric method can also be used with very dilute solutions or for solutions for which there is no suitable indicator. The conductometric titration method gives you empirical results that are calculated for you, eliminating potential sources of error. And the measurements can be stored in memory for later data transfer using the optional U2CI software and bluDock Bluetooth hardware installed on the 9P . This makes data analysis and reporting seamless.

What else can the Ultrameter III 9P do?

Alkalinity, hardness, pH and temperature values used to compute the saturation index of a sample can be manipulated in the LSI Calculator function, allowing you to perform on the spot analysis of water balance scenarios. You can use historical or theoretical data to populate the required values in the calculator.

And the 9P titration kit comes with all required accessories, reagents, and calibration solutions (see Figure 6). Streamline your field testing with an Ultrameter III 9P from MyronLMeters, where you can save 10% when you order online.

Myron L Meters is the premier online retailer of accurate, reliable, and easy-to-use Myron L meters like the Ultrameter III 9P.  Save 10% when you order online at MyronLMeters.com. Find out more about the Ultrameter III 9P in our Myron L Meters – Ultrameter III 9P Titration Kit Overview video.

 

Categories : Case Studies & Application Stories, Product Updates

Water Industry News: MyronLMeters.com

Posted by 19 Apr, 2014

Tweet   Water Industry News from MyronLMeters.com Published by Myron L Meters 18 April 2014 Read paper → Environment Health Science World Stories   California’s Governor Wants Water Tunnels. Antitax Group Wants to Know Who Pays – Businessweek Shared by Myron L Meters www­.businessweek.com – California has a $25 billion plan to transport snowmelt from […]





 



Water Industry News
from MyronLMeters.com


Published by
Myron L Meters
18 April 2014


Read paper →


Environment


Health


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World


Stories

 


California’s Governor Wants Water Tunnels. Antitax Group Wants to Know Who Pays – Businessweek


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- California has a $25 billion plan to transport snowmelt from the northern Sierras through a pair of 37-mile tunnels to farms and cities in the south. But there’s no indication of how much water use…


On the real performance of cation exchange resins in wastewater treatment under conditions of cation competition: the case of heavy metal pollution – Online First – Springer


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- Sorption performance of cation-exchange resins Amberlite® IRN77 and Amberliteâ„¢ IRN9652 toward Cs(I) and Sr(II) has been tested in single-component aqueous solutions and simulated waste effluents co…


China seeks solution to providing clean drinking water supplies


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- Large colonies of micro-organisms – some capable of causing serious disease – have been discovered inside pipelines carrying drinking water to homes in most major mainland cities, the South China M…


City moves to secure $27.5M for wastewater treatment plant


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- Orangeburg City Council gave first reading Tuesday night to a series of ordinances that will help finance the Department of Public Utilities’ $27.5 million wastewater treatment plant overhauls and …


Reaping the benefits of a composting toilet


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- Composting toilets are a win in rural India. Improved sanitation means better health for the owners and their neighbors. After the pit has been used for about a year and is getting full, they seal …


The Power of Water


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- The water and sanitation problem in the world is far too big for charity alone. At Water.org, we are driving the water sector for new solutions, new financing models, greater transparency, and real…


Portland, Ore., is dumping 38 million gallons of drinking water because of a urinating teenager


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- Portland, Ore., is dumping 38 million gallons of drinking water because of a urinating teenager By Mark Berman April 17 at 2:49 pm More Comments It took one teenager urinating in a reservoir for th…


Desalination Plant Said to Be Planned for Thirsty Beijing – NYTimes.com


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- BEIJING — A coastal desalination plant planned for east of Beijing could provide a large portion of the drinking water for the parched Chinese capital by 2019, the state news media quoted officials…


How to Build a Rain Garden and Curb Water Pollution (VIDEO)


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- Have you ever heard of a rain garden? Building a rain garden, which helps reserve stormwater and keep it out of neighboring rivers, lakes, and ponds you want to help keep clean, can help curb water…


Chinese court dismisses water pollution lawsuit


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- BEIJING (Reuters) – A Chinese court has rejected a lawsuit filed by five residents from a major northwestern city after authorities said a cancer-inducing chemical had been found in tapwater at 20 …


Government Agency Takes On Non-Revenue Water


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- Trenton Water Works is struggling with the problem of non-revenue water.  A new report “tracks the amount of water lost before it gets to the tap in Mercer County — and leading the pack with the mo…


The Stream, April 16: Scientist Says Deforestation, Not Dams, Caused Massive Flood in the Amazon


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- Extreme Weather Extreme flooding along the Madeira River in the Amazon basin, which killed 60 people and displaced 68,000 families this year, was the result of massive deforestation in Bolivia and …




Environment


U of C Nurses for Clean Water


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Local Vendors Make a Fast Buck Using Water Scarcity – The New Indian Express


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How a facebook group from Pune brought aid to drought affected Maharashtra


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Governor’s Coal Ash Action Plan Favors Duke Energy, Threatens Drinking Water


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Waterkeeper.Org » McCrory’s Coal Ash Plan a Failure


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Restoring Louisiana’s Coast Will Require Restoring Its Democracy—Governor Jindal Is Trying to Undermine Both


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Waterkeeper.Org » Splash Series Events


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Natural Cleansers – NRDC


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NRDC: Chemical Index


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If you think FDA knows what chemicals are in our food, think again. | Maricel V. Maffini, PhD’s Blog


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Water Quality > Town of Devon


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NYCWasteLess – Spring 2014 SAFE Disposal Events


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Ocean Acidification Could Make Fish Lose Their Fear Of Predators, Study Finds


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BBC News – Guernsey beach fails water quality standard


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LI Sound water quality improvement on target


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Water district proposes taking over leaky, empty Ten Mile Creek project » TCPalm.com


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Water Industry News was originally published on Myron L Meters Blog

Categories : Company News, Water Industry News

FDA Warning: MyronLMeters.com

Posted by 14 Apr, 2014

Tweet  FDA Warning Are You FDA Compliant? In recent news “A warning letter sent to (a dialysis clinic operator) by the US Food and Drug Administration (FDA)”… “FDA said the company needs to take “prompt action to correct the violations addressed in the letter,” and that failure to comply could lead to more serious regulatory […]

 

FDA Warning

Are You FDA Compliant?

In recent news “A warning letter sent to (a dialysis clinic operator) by the US Food and Drug Administration (FDA)”… “FDA said the company needs to take “prompt action to correct the violations addressed in the letter,” and that failure to comply could lead to more serious regulatory enforcement actions, up to and including seizure, injunction and civil penalties.”

Are your devices FDA 510K compliant? Click here to learn about the FDA 510K compliant D-6 and D-4 from Myron L Meters. Order online and save 10%. ‘Digital Dialysate Meter D-6

                                   
D-6               Click to view product details                 D-4
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Ready to convert all your clinics to a D-4 or D-6?  Let us know and we’ll send you a coupon code for extra savings.

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Categories : Case Studies & Application Stories, Company News

Measuring ORP: MyronLMeters.com

Posted by 12 Apr, 2014

Tweet Ultrapen PT3 ORP tester Though the measurement of free chlorine concentration is often indicated for the disinfection of water and disinfectant byproduct control, there is a better way. Because free chlorine works through oxidation, ORP instrumentation can be used to monitor and control its effectiveness. ORP measures the actual oxidation power of the solution, […]



Ultrapen PT3 ORP tester Ultrapen PT3 ORP tester



Though the measurement of free chlorine concentration is often indicated for the disinfection of water and disinfectant byproduct control, there is a better way. Because free chlorine works through oxidation, ORP instrumentation can be used to monitor and control its effectiveness. ORP measures the actual oxidation power of the solution, specifically the strength and number of oxidation and reduction reactions in solution. This yields a clear picture of the efficacy of the chlorine present, regardless of the concentration or ratio of chlorine species in solution.
Measuring ORP directly reflects the sanitizing power of free chlorine or any other oxidizing or reducing chemicals. The measurement of ORP is precise, empirical and requires no user interpretation, making it ideal for water quality and industrial process control.
What is ORP?
ORP stands for Oxidation Reduction Potential, sometimes called REDOX. ORP is a differential measurement of the mV potentials built up when electrodes are exposed to solutions containing oxidants and reductants. ORP describes the net magnitude and direction of the flow of electrons between pairs of chemical species, called REDOX pairs.
In a REDOX pair, one chemical loses electrons while the other chemical gains electrons. The chemical in the REDOX exchange that acquires electrons is called the oxidant (HOCL, OCl-, ClO2, bromine, hydrogen peroxide, etc.). The chemical in the REDOX exchange that gives up electrons is called the reductant (Li, Mg2, Fe2+, Cr2, etc.). Oxidants acquire electrons through the process of reduction, i.e., they are reduced. Reductants lose their electrons through the process of oxidation, i.e., they become oxidized.
How is ORP measured?
ORP sensors are basically two electrochemical half-cells: A measurement electrode in contact with the solution being measured and a reference electrode in contact with a reservoir of highly concentrated salt solution.
When the solution being measured has a high concentration of oxidizers, it will accept more electrons than it loses so that the measurement electrode develops a higher electrical potential than the reference electrode. A voltmeter placed in line with the two electrodes will display this difference in potential between the two electrodes. Once the entire system reaches equilibrium, the resulting net potential difference represents the ORP. A positive reading indicates an oxidizing solution, and a negative reading indicates a reducing solution. The more positive or negative the value, the more powerful the oxidants or reductants, the greater their concentrations or both.
What does ORP measure?
ORP can be used to determine the efficacy of chemical disinfectants that work via the oxidation or reduction of the structures of microbial contaminants. For example, chlorine, an oxidant, will strip electrons from the negatively charged cell walls of some bacteria. Because ORP measures the total chemical activity of a solution, ORP measures the total efficacy all oxidizing and reducing disinfectants in solution: Hypochlorous acid, monochloramine, dichloramine, hypobromous acid, sodium hypochlorite, UV, ozone, peracetic acid, bromochlorodimethylhydantoin, etc.
ORP indicates the effectiveness of only those disinfectants that work through oxidation and reduction. ORP cannot be used to detect the presence of any one particular chemical or chemical species. Nor can it alone be used to determine the concentration of a known species of chemical in solution. This means that although ORP is the best way to know whether or not your sanitizer is working, it can’t tell you how much or what kind of sanitizer is working.
What factors affect ORP measurement?
While the accuracy of ORP sensors is relatively stable, which is why they do not require calibration, there are factors that affect their response time. Changes in temperature can affect response times by altering the kinetic rates of the reactions being measured, for example. Low temperatures reduce the kinetic rates and lengthen sensor response times.
The condition of the electrode will also alter response times by changing the “exchange current density” (the amount of electrons exchanged per unit area of exposed electrode). The lower the exchange current density, the more sluggish the sensor response. The typical measurement electrode is made from pure platinum (Pt) because it is a noble metal and, therefore, highly unreactive, i.e., the potential being measured is most likely due to the activity of the chemicals in the water and not reactions between the solution and the Pt itself. Even though Pt is a noble metal, it will form a thin oxide layer on the surface of the platinum when exposed to dissolved oxygen. This oxide layer facilitates the ORP measurement when it is very thin, one molecule thick, by attracting, or “adsorbing,” hydrolyzed oxidant or reductant molecules to the surface of the electrode.
Unfortunately, when the oxide layer becomes more than one molecule thick, the resulting lowered exchange current density offsets this benefit. Also, the adsorbed molecules cause a “memory effect.” If a sensor is placed in a less oxidizing solution after measuring a more oxidizing solution, it can take a very long time for the sensor to equilibrate to the new sample. Though the sensor response time is much slower, the final ORP reading will be the same.
ORP electrodes never require recalibration because there is no drift in zero point (as is the case with pH sensors). Any deviation from expected readings is most likely due to surface contamination of the electrodes or buildup of the oxide layer, both of which can easily be remedied by cleaning with a light abrasive, such as Softscrub®. Exposing the sensor to an “ORP conditioning solution” will help reduce the memory effect due to adsorption.
Can ORP be used as a surrogate parameter for free chlorine?
Yes. ORP measures the oxidizing power and, therefore, the actual residual sanitizing strength of the solution being tested. Simply counting how much chlorine is present is misleading because certain changes in water chemistry, such as pH or the addition of cyanuric acid, dramatically alter the oxidizing power of chlorine and, therefore, its efficacy, without changing how much chlorine is present.
When correlated with established disinfection control parameters, measurements and bacterial plate counts, this type of measurement gives a very accurate picture of the sanitizing activity. For this correlation to be valid, the water undergoing treatment must be characterized so that all chemical constituents are known. The pH and temperature values should be reported and held constant. ORP will report an empirical value or a hard number that indicates how active the sanitizer is. However, you have to make certain that microbial contamination is responding to the treatment. Once a correlation is established in a stable system, ORP is a very efficient and effective way to monitor microbial control.
ORP has long been used in bathing waters as the only means for automatic chemical dosing. In fact, the World Health Organization (WHO) suggests an ORP value of between 680-720 mV, depending on the sensor and the particular context, for safe bathing water. In the disinfection of drinking water, an ORP value of ~800 mV is required for oocyst inactivation.
For the purpose of pretreatment screening to detect chlorine levels prior to contact with chlorine-sensitive RO membranes, influent must first be screened to determine which chemicals besides chlorine are present that contribute to the ORP value. With these interferants characterized and pH and temperature held constant, ORP can be correlated to specific sanitizer concentrations, such as chlorine, in their known forms. Some manufacturers of RO membranes and other water quality treatment equipment will also specify an ORP tolerance value for prescreening and influent control. The same holds true of effluent screening.
Why ORP?
ORP is a faster, simpler empirical measurement than titration with DPD or other methods, and in many cases it gives the most accurate picture of the effect of all oxidizing and reducing chemicals in solution. No in-depth knowledge or training is required to obtain accurate repeatable results. User error is virtually eliminated because ORP readings require no subjective, visual interpretation, nor do they require calibration.
Using ORP disinfectant control can be automated because the measurement produces an electrical signal that can trigger switches when outside established control parameters. And ORP sensors are relatively low-maintenance. If you’re not using ORP to monitor and control chemical additions that work through REDOX, you should. You’ll save yourself time, hassle and money.
Myron L Meters is the premier internet retailer of accurate, reliable Myron L meters like the Ultrapen PT3, ORP pen tester.
Categories : Case Studies & Application Stories

DEIONIZED WATER APPLICATIONS: MyronLMeters.com

Posted by 11 Apr, 2014

TweetYears ago, high purity water was used only in limited applications. Today, deionized (Dl) water has become an essential ingredient in hundreds of applications including: medical, laboratory, pharmaceutical, cosmetics, electronics manufacturing, food processing, plating, countless industrial processes, and even the final rinse at the local car wash. THE DEIONIZATION PROCESS The vast majority of dissolved […]

Years ago, high purity water was used only in limited applications. Today, deionized (Dl) water has become an essential ingredient in hundreds of applications including: medical, laboratory, pharmaceutical, cosmetics, electronics manufacturing, food processing, plating, countless industrial processes, and even the final rinse at the local car wash.

THE DEIONIZATION PROCESS
The vast majority of dissolved impurities in modern water supplies are ions such as calcium, sodium, chlorides, etc. The deionization process removes ions from water via ion exchange. Positively charged ions (cations) and negatively charged ions (anions) are exchanged for hydrogen (H+) and hydroxyl (OH-) ions, respectively, due to the resin’s greater affinity for other ions. The ion exchange process occurs on the binding sites of the resin beads. Once depleted of exchange capacity, the resin bed is regenerated with concentrated acid and caustic which strips away accumulated ions through physical displacement, leaving hydrogen or hydroxyl ions in their place.

DEIONIZER TYPES
Deionizers exist in four basic forms: disposable cartridges, portable exchange tanks, automatic units, and continuous units. A two-bed system employs separate cation and anion resin beds. Mixed-bed deionizers utilize both resins in the same vessel. The highest quality water is produced by mixed-bed deionizers, while two-bed deionizers have a larger capacity. Continuous deionizers, mainly used in labs for polishing, do not require regeneration.

TESTING Dl WATER QUALITY
Water quality from deionizers varies with the type of resins used, feed water quality, flow, efficiency of regeneration, remaining capacity, etc. Because of these variables, it is critical in many Dl water applications to know the precise quality. Resistivity/ conductivity is the most convenient method for testing Dl water quality. Deionized pure water is a poor electrical conductor, having a resistivity of 18.2 million ohm-cm (18.2 megohm) and conductivity of 0.055 microsiemens. It is the amount of ionized substances (or salts) dissolved in the water which determines water’s ability to conduct electricity. Therefore, resistivity and its inverse, conductivity, are good general purpose quality parameters.

Because temperature dramatically affects the conductivity of water, conductivity measurements are internationally referenced to 25°C to allow for comparisons of different samples. With typical water supplies, temperature changes the conductivity an average of 2%/°C, which is relatively easy to compensate. Deionized water, however, is much more challenging to accurately measure since temperature effects can approach 10%/°C! Accurate automatic temperature compensation, therefore, is the “heart’ of any respectable instrument.

RECOMMENDED MYRON L METERS
Portable instruments are typically used to measure Dl water quality at points of use, pinpoint problems in a Dl system confirm monitor readings, and test the feed water to the system. The handheld Myron L meters have been the first choice of Dl water professionals for many years. For two-bed Dl systems, there are several usable models with displays in either microsiemens or ppm (parts per million) of total dissolved solids. The most versatile instruments for Dl water is the 4P or 6PFCE Ultrameter II™, which can measure both ultrapure mixedbed quality water and unpurified water. It should be noted that once Dl water leaves the piping, its resistivity will drop because the water absorbs dissolved carbon dioxide from the air. Measuring of ultrapure water with a hand-held instrument requires not only the right instrument, but the right technique to obtain accurate, repeatable readings. Myron L meters offer the accuracy and precision necessary for ultrapure water measurements.

Inline Monitor/controllers are generally used in the more demanding Dl water applications. Increased accuracy is realized since the degrading effect of carbon dioxide on high purity water is avoided by use of an in-line sensor (cell). This same degradation of ultrapure water is the reason there are no resistivity calibration standard solutions (as with conductivity instruments). Electronic sensor substitutes are normally used to calibrate resistivity Monitor/controllers.

Myron L Meters carries a variety of inline instruments, including resistivity Monitor/controllers designed specifically for Dl water. Seven resistivity ranges are available to suit any Dl water application: 0-20 megohm, 0-10 megohm, 0-5 megohm, 0-2 megohm, 0-1 megohm, 0-500 kilohm, and 0-200 kilohm. Temperature compensation is automatic and achieved via a dual thermistor circuit. Monitor/controller models contain an internal adjustable set point, piezo alarm connectors and a heavy-duty 10 amp relay circuit which can be used to control an alarm, valves, pump, etc. Available options include 4-20 milliamp output, 3 sensor input, 3 range capability and temperature. Internal electronic sensor substitutes are standard on all Monitor/controllers.

Sensors are available constructed in either 316 stainless steel or titanium. All sensors are provided with a 3/4″ MNPT polypropylene bushing and 10 ft./3 meters of cable. Optional PVDF or stainless steel bushings can be ordered, as well as longer cable lengths up to 100 ft./30 meters.

The following table briefly covers recommended Myron L meters for Dl water applications.

DEIONIZED WATER APP TABLE

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Categories : Application Advice, Case Studies & Application Stories, Product Updates, Science and Industry Updates, Technical Tips

New Ultrapen Resources: MyronLMeters.com

Posted by 8 Apr, 2014

Tweet  New Ultrapen Resources New Ultrapen Resources YouTube, Myron L Meters Blog, and Product Pages At Myron L Meters, we’ve been busy lately updating our YouTube Channel to bring you the latest product overviews, calibration, care and maintenance, and product features videos. We’ve been keeping them short and focused because we know you’re busy. We’re […]

 

New Ultrapen Resources


New Ultrapen Resources

YouTube, Myron L Meters Blog, and Product Pages

At Myron L Meters, we’ve been busy lately updating our YouTube Channel to bring you the latest product overviews, calibration, care and maintenance, and product features videos. We’ve been keeping them short and focused because we know you’re busy. We’re creating similar blog posts so you will always have your choice of video instruction overview and handy print reference. Have suggestions for videos?  Would you like a branded video for your company? Let us know at MyronLMeters@gmail.com.

Myron L Meters presents a review of the Ultrapen PT2 that measures pH. In this video, we cover the steps for measuring pH, changing the temperature setting, changing the pH measurement mode, and overall features.

Click to find out how!
“The Ultrapen PT2 is compact, reliable, easy to use and so far seems very durable while riding in its carry case between measurements. I use it daily and it reliably delivers PH and temperature.”
Calibration of the Ultrapen PT3 ORP Pen
The factory recommends calibrating twice a month, depending on usage. However, you should check the calibration whenever measurements are not as expected.
NOTE: If the measurement is NOT within calibration limits for any reason, “Error” will display. Check to make sure you are using a proper ORP calibration solution. If the solution is correct, clean the sensor as described im the manual under Routine Maintenance. (Reconditioning the sensor should not be necessary due to the high ionic strength of the calibration solutions.) Restart calibration.
NOTE: Small bubbles trapped in the sensor may give a false calibration. After calibration is completed, measure the ORP calibration solution again to verify correct calibration. Remember, in measurement mode you must manually correct for temperature variance from 25ºC. Example: At 25ºC, ORP2602OZ calibration solution will read 260mV; however, at 20.0ºC ORP2602OZ will read 265mV.
NOTE: If at any point during calibration, you do not submerge the sensor in solution
before the flashing slows, allow the PT3 to turn off and start over.
READ MORE
Our Ultrapen PT1 product overview video has been embedded on a Russian water products company website.


Want to stay up-to-date with Myron L Meters products?  Check out our blog and subscribe to our YouTube Channel.  You’ll get the latest maintenance tips, product updates, and more…
Cool Customers
At Myron L Meters, we think all of our customers are cool, but when this guy ordered an Ultrameter II 6P we thought it was VERY cool. Thank you, Jason Statham. It just goes to show you that – even if you’re expendable – you want your meter to last.
You’ll find our complete selection of Ultrapens HERE.
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Categories : Care and Maintenance, Product Updates, Technical Tips, Videos

Reverse Osmosis: MyronLMeters.com

Posted by 7 Apr, 2014

Tweet  Reverse Osmosis   RO Meter – RO-1: 0-1250 ppm with color band RO Meters The choice of professionals for years, this compact instrument has been designed specifically to demonstrate and test Point of Use (POU) reverse osmosis or distillation systems. By measuring electrical conductivity, it will quickly determine the parts per million/Total Dissolved Solids […]

 

Reverse Osmosis


 

RO Meter – RO-1: 0-1250 ppm with color band

RO Meters
The choice of professionals for years, this compact instrument has been designed specifically to demonstrate and test Point of Use (POU) reverse osmosis or distillation systems. By measuring electrical conductivity, it will quickly determine the parts per million/Total Dissolved Solids (ppm/TDS) of any drinking water.
With a single ‘before and after’ test, this handy device effectively demonstrates how your RO or distillation system eliminates harmful dissolved solids. It will also service test systems, including membrane evaluation programs.Save $25.00 on the Ro-1 this month with coupon code: ROSave25

 

Ultrameter II – 6PIIConductivity, TDS, Salinity, pH, ORP, Temp Pens

Reverse osmosis biofouling

Introduction
Water desalination via reverse osmosis (RO) technology provides a solution to the world’s water shortage problem. Until now, the production of fresh water from seawater has reached 21-million cubic meter per day all around the world (Wangnick, 2005). However, the success of RO technology is subject to improvement as the technology is challenged by a biofouling problem –a problem related to biological material development which forms a sticky layer on the membrane surface (Flemming, 1997; Baker and Dudley, 1998).
Continuous biofouling problems in RO lead to higher energy input requirement as an effect of increased biofilm resistance (Rf) and biofilm enhanced osmotic pressure (BEOP), lower quality of product water due to concentration polarization (CP) – increased concentration due to solutes accumulation on the membrane surface, (Herzberg and Elimelech, 2007), and thus significant increase in both operating and maintenance costs.

Recent studies and objectives
Recent studies show the importance of the operating conditions (e.g. flux and cross flow velocities) in RO biofouling. The presence of feed channel spacers has also been getting more attention as it may have adverse effects. A previous study (Chong et al., 2008) without feed channel spacers showed that RO biofouling was a flux driven process where higher flux increased fouling rate.

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ULTRAPEN Set – PT1, PT2, & PT3

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Categories : Application Advice, Case Studies & Application Stories, Science and Industry Updates, Technical Tips