Myron L UltraPen PTBT2 pH and Temperature Pen

Posted by 5 Aug, 2014

TweetComing Soon!                   ULTRAPEN PTBT2 pH and Temperature Pen The Myron L Ultrapen PTBT2 is an accurate, easy-to-use pH meter and temperature tester in s durable aircraft aluminum case. The Ultrapen PTBT2 has the same range and accuracy as an Ultrameter II but fits in your pocket. […]

Coming Soon!

Ultrapen PTBT1 and PTBT2

Ultrapen PTBT1 and PTBT2

 

 

 

 

 

 

 

 

 

ULTRAPEN PTBT2 pH and Temperature Pen

The Myron L Ultrapen PTBT2 is an accurate, easy-to-use pH meter and temperature tester in s durable aircraft aluminum case. The Ultrapen PTBT2 has the same range and accuracy as an Ultrameter II but fits in your pocket. readings and calibration are easy. If you’re a pool service tech, hydroponics grower, or water quality consultant, you’ll love using the PTBT2…for a long time to come.

A free app takes advantage of Apple’s iOS graphical user interface to provide easy-to-read displays and a simple-to-use interface. The Bluetooth link means that there are no wires getting in the way when moving quickly between samples and that paired mobile devices can be held safely away from liquids.

Advanced features include: automatic temperature compensation; stable microprocessor-based circuitry; user-intuitive design and a rugged, waterproof housing.
The Ultrapen PTBT2 measures pH and temperature with one-, two- and three-point calibration options.

With the Ultrapen OS app, each Ultrapen PTBTx can be given a unique name stored in the Ultrapen’s memory so it is easily identifiable no matter what mobile device is used. Measurement locations can be programmed as GPS locations that are automatically selected when the user is close to a specific measurement local, or non-GPS locations, which are ideal for applications where the sample sites are too close together for the GPS to discriminate.

Through the app, items such as Ultrapen settings, sample temperatures, Ultrapen name and measurement locations can be saved to the mobile device’s memory. Records can be exported via the mobile device’s email function as either .csv, .xls, .xlsx formatted files or using a proprietary, encrypted format. Stored measurements can be sorted or filtered and then emailed or deleted without affecting other records stored in the memory.
The Ultrapen PTBT3 with ORP and temperature measurement, Ultrapen PTBT4 with free chlorine equivalent and temperature measurement, and an Android-compatible app are all coming soon.

HIGH PERFORMANCE FEATURES
- Accuracy of ±0.01 pH
- 1, 2 and 3 Point Calibration
- Proprietary Sensor Design
- Automatic temperature compensation
- Reliable Repeatable Results
- Rugged, reliable, shock-resistant fully encapsulated electronics
- Durable body constructed of aircraft aluminum
- Simple one button function
- High capacity N-type battery included
- Waterproof

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The app’s GUI allows the user to:
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Easily connect to any active ULTRAPEN PTBTx pocket tester by one-touch selection from a list of available testers. Connection screen ONLY shows PTBTx pocket testers and ignores other Bluetooth devices.

Download a 14 character name into each ULTRAPEN PTBTx so that it is easily identifiable no matter what mobile device it is used with.

Program locations either as GPS related locations (automatically selected whenever the user is close to a specific measurement local), but also as non-GPS related locations (ideal for applications where sample sites are too close to each other for the GPS to discriminate).

Store Measurement Data and Calibration History that include:
- Measurement Value.
- UltraPen ID / Name.
- Location (programmable as both GPS and Non-GPS related locations)

Data records are:
- Sortable
- Exportable in .xls; .xlsx, .csv format as well as an encrypted, secure Myron L Company proprietary format.
- Can be filtered so that subsets of records can be deleted or exported without affecting other records stored in the device’s memory.

ULTRAPEN Features
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
Advanced features include automatic temperature compensation; highly stable microprocessor-based circuitry; user-intuitive design; and waterproof housing. The PTBTx Pocket Testers are easy to calibrate and easy to use.

WORKS WITH
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
PTBT1 – measures Conductivity, Total Dissolved Solids (TDS), Salinity, and Temperature, with the ability to select from three different solution types that model the characteristics of the most commonly encountered types of water.

PTBT2 – Measures pH and Temperature. Includes a sample and hold mode as well as a live measurements mode. Can be calibrated using 1, 2, and 3 point calibration options.

Future ULTRAPEN PTBTx pocket testers will include measurement of ORP, Free Chlorine and Dissolved Oxygen.

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Compatibility: Requires iOS 6.1 or later. Compatible with iPhone, iPad, and iPod touch. This app is optimized for iPhone 5.

What’s Included
The Ultrapen PTBT2 Comes with:
PT2 Pocket Tester Pen – battery included
a Scoop
a Soaker Cap
a Pocket Clip
a Holster
a Lanyard
complete operating Instructions
and a 2oz bottle of pH Storage Solution

Average Customer Review: 5 of 5 | Total Reviews: 2

Performs reliably for me every day April 27, 2014

Reviewer: Ron W., consultant from Huntington Beach CA
I purchased two Myron PT2 Ultrapens for pH and temperature monitoring in June this year and I use them 5 days a week without any problems whatsoever. I monitor pH and temperature on a Biotrickling filter foul air scrubber in a remote location and the Ultrapen performs reliably for me every day. I will be looking to Myron to purchase other instruments as the need arises.

The pH unit that works! April 13, 2014

Reviewer: Coree Coppinger from Milwaukee, WI, US
The other hand held meters varied in price from about 18.00 to 170.00, yet they preform the same: inaccurate, slow, leaked and turn itself off before the calculation was finished. All instructions were performed as noted by directions and videos.

A small field pH unit that was accurate and could be counted on. I relish in it’s simplicity and accuracy. The bottom rubber cap has a sponge inside of it to hold the storage solution, this is smart, although the push and twist is difficult with a flexible rubber cap. This could be better designed with a hard twist cap and a O RING in the inside of the cap. I am so happy to find a unit that preforms as it is supposed to, and is dead on with the solutions. The only thing to test next is how well it preforms with time. Yes this Myron L UltraPen PT2 is worth the money. After the ill fated experiences with the other brands being sold on the market you will find the price is much easier to swallow. It works and is accurate, that is all I ask!

 

Categories : Product Updates

Replacing the Ultrapen PT2 pH Tester Battery: MyronLMeters.com

Posted by 3 Apr, 2014

TweetI. Battery Replacement The PT2 display has a battery charge indicator that depicts the life left in the battery. When the indicator icon is at 3 bars, the battery is full. When the indicator icon falls to 1 bar, replace the battery with an N type battery.             1. In […]

I. Battery Replacement
The PT2 display has a battery charge indicator that depicts the life left in the battery. When the indicator icon is at 3 bars, the battery is full. When the indicator icon falls to 1 bar, replace the battery with an N type battery.

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1. In a CLEAN DRY environment unscrew the pen cap in a counter-clockwise motion.
2. Slide the cap and battery housing out of the pen.
3. Remove the depleted battery out of its housing.
4. Insert a new battery into the battery housing oriented with the negative end touching the spring.
5. Align the groove along the battery housing with the guide bump inside the pen case and slide the battery housing back in.
6. Screw the pen cap back on in a clockwise direction. Do not overtighten.

MyronLMeters.com is the premier internet retailer of the Ultrapen PT2 and other reliable Myron L meters. Save 10% on Myron L meters when you order online HERE.

Categories : Application Advice, Care and Maintenance, Technical Tips

Calibrating the Ultrapen PT2 pH Tester: MyronLMeters.com

Posted by 3 Apr, 2014

Tweet I.      Calibration The factory recommends calibrating the Ultrapen PT2 pH tester twice a month, depending on usage. However, you should check the calibration whenever measurements are not as expected. 3-point Wet Calibration is most accurate and is recommended. NOTE: If the measurement is NOT within calibration limits for any reason, “Error” will display. Check […]

I.      Calibration

The factory recommends calibrating the Ultrapen PT2 pH tester twice a month, depending on usage. However, you should check the calibration whenever measurements are not as expected. 3-point Wet Calibration is most accurate and is recommended.

NOTE: If the measurement is NOT within calibration limits for any reason, “Error” will display. Check to make sure you are using a proper pH buffer solution. If the solution is correct, clean the glass bulb of the sensor with a cotton swab soaked in isopropyl alcohol. Restart calibration.

NOTE: Small bubbles trapped in the sensor may give a false calibration. After calibration is completed, measure the pH buffer solutions again to verify correct calibration.

NOTE: If at any point during calibration, you do not submerge the sensor in solution

before the flashing slows, allow the pen to power off and start over.

A.    Calibration Preparation

  1. For maximum accuracy, fill 2 clean containers with each pH buffer. Arrange them in such a way that you can clearly remember which is the rinse solution and which is the calibration buffer. If you don’t have enough buffer, you can use 1 container of each buffer for calibration and 1 container of clean water for all rinsing. Always rinse the pH sensor between buffer solutions.

2.   Ensure the pH sensor is clean and free of debris.

B.    3-Point Calibration

Use pH 7, 4 and 10 buffers for 3-point calibration.

1. Thoroughly rinse the pen by submerging the sensor in pH 7 buffer rinse solution and swirling it around.

2. Push and release the push button to turn the unit on.
3. Push and hold the push button. The display will alternate between “CAL”, “FAC CAL”, “ºCºF TEMP”, “ModE SEL” and “ESC”.
4. Release the button when “CAL” displays. The display will indicate “CAL” and the LED will flash rapidly. 
5. While the LED flashes rapidly, dip the pen in pH 7 buffer calibration solution so that the sensor is completely submerged. 
6. While the LED flashes slowly, the pH calibration point will display along with “CAL”. Swirl the pen around to remove bubbles, keeping the sensor submerged.
7.   If the pH 7 calibration is successful, the display will indicate “SAVED”, then “PUSHCONT” will be displayed.

8.   Push and release the push button to continue. The LED will begin flash rapidly.Repeat steps 5 through 8 with pH 4 and 10 buffer calibration solutions.After the 3rd calibration point is successfully saved, the display will indicate “SAVED” and power off.Verify calibration by retesting the calibration solution.

C.    2-Point Calibration

Use pH 7 and 4 or 10 buffers for 2-point calibration.

  1. Thoroughly rinse the pen by submerging the sensor in pH 7 buffer rinse solution and swirling it around.
  2. Push and release the push button to turn the unit on.
  3. Push and hold the push button. The display will alternate between “CAL”, “FAC CAL”, “ºCºF TEMP”, “ModE SEL” and “ESC”.
  4. Release the button when “CAL” displays. The display will indicate “CAL” and the LED will flash rapidly.
  5. While the LED flashes rapidly, dip the pen in pH 7 buffer calibration solution so that the sensor is completely submerged.
  6. While the LED flashes slowly, the pH calibration point will display along with “CAL”. Swirl the pen around to remove bubbles, keeping the sensor submerged.
  7. If the pH 7 calibration is successful, the display will indicate “SAVEd”, then “PUSHCONT” will be displayed.
  8. Push and release the push button to continue. The LED will begin flashimg rapidly.

Repeat steps 5 through 7 with pH 4 or 10 buffer calibration solution.

Leave the pen in the same buffer solution until the unit powers off. The offset will be applied to the remaining calibration point.
Verify calibration by retesting the calibration solution.

 

D.    1-Point Calibration

Use pH 7, 4 or 10 buffer for 1-point calibration.

  1. Thoroughly rinse the pen by submerging the sensor in pH buffer rinse solution and swirling it around.
  2. Push and release the push button to turn the unit on.
  3. Push and hold the push button. The display will alternate between “CAL”, “FAC CAL”, “ºCºF TEMP”, “ModE SEL” and “ESC”.
  4. Release the button when “CAL” displays. The display will indicate “CAL” and the LED will flash rapidly.
  5. While the LED flashes rapidly, dip the pen in pH buffer calibration solution so that the sensor is completely submerged.
  6. While the LED flashes slowly, the pH calibration point will display along with “CAL”; swirl the pen around to remove bubbles, keeping the sensor submerged.

If the pH calibration is successful, the display will indicate “SAVEd”, then “PUSHCONT” will be displayed. “PUSHCONT” will not display if you calibrated 4 or 10.

Leave the pen in the same buffer solution until the unit powers off. The offset will be applied to the remaining calibration points.

Verify calibration by retesting the calibration solution.

E.    Factory Calibration

When pH buffers are not available, the PT2 can be returned to factory default calibration using the FAC CAL function. This will erase any stored wet calibration. NOTE: default factory calibration resets the electronics only and does NOT take the condition of the sensor into consideration.

To  return your unit to factory calibration:

  1. Push and release the push button.
  2. Push and hold the push button. The display will alternate between “CAL”, “FAC CAL”, “ºCºF TEMP”, “ModE SEL” and “ESC”.
  3. Release the button when “FAC CAL” displays. The display will alternate between “PUSHnHLD” and “FAC CAL”.
  4. Push and hold the push button. “SAVED FAC” displays indicating the pen has been reset to its factory calibration.

MyronLMeters.com is the premier internet retailer of the Ultrapen PT2 and other reliable Myron L meters. Save 10% on Myron L meters when you order online HERE.

Categories : Application Advice, Care and Maintenance, Product Updates, Technical Tips

Ultrapen PT2 pH Tester Measurement: MyronLMeters.com

Posted by 3 Apr, 2014

Tweet Measuring pH and Temperature with the Ultrapen PT2 NOTE: Selecting “ESC” from any menu immediately powers the unit off without saving changes. I. Temperature Unit Selection The PT2 allows you to select the type of units used for displaying temperature: ˚C (Degrees Celsius) or ˚F (Degrees Fahrenheit). To set the preference: 1. Push and […]

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Measuring pH and Temperature with the Ultrapen PT2

NOTE: Selecting “ESC” from any menu immediately powers the unit off without saving changes.

I. Temperature Unit Selection

The PT2 allows you to select the type of units used for displaying temperature:
˚C (Degrees Celsius) or ˚F (Degrees Fahrenheit).

To set the preference:
1. Push and release the push button to turn the unit on.
2. Push and hold the button. The display will alternate between “CAL”, “FAC CAL”, “ºCºF TEMP”, “ModE SEL” and “ESC”.
3. Release the button while “ºCºF TEMP” is displayed. The display will alternate between “PUSHnHLD” and “ºCºF TEMP”.
4. Push and hold the button. The display will alternate between “˚C”, “˚F” and
“ESC”. Release the button when desired unit preference displays.
5. “SAVEd ºC” or “SAVEd ºF” will display; then the unit will power off.

II. pH Mode Selection

The PT2 allows you to select the pH measurement mode you prefer:
Hold (once stabilized, the readings are captured then displayed) or
LIVE (real-time readings are displayed continuously during measurement)
To set the pH measurement mode preference:
1. Push and release the push button to turn the unit on.
2. Push and hold the button. The display will alternate between “CAL”, “FAC CAL”, “ºCºF TEMP”, “Mode SEL” and “ESC”.
3. Release the button when “ModE SEL” is displayed. The display will alternate between “PUSHnHLD” and “Mode SEL”.
4. Push and hold the push button. The display will alternate between “Hold”, “LIVE” and “ESC”.
5. Release the button when desired mode displays.
6. “SAVED” will display, then the unit will power off.

III. pH Measurement

The following table explains what the LED Indicator Light signals indicate and gives the duration of each signal:

LED Signal Action Duration
Rapid Flashing Dip pen in solution. 6 sec
Slow Flashing Measurement in process.
In LIVE mode, the readings are displayed. In LIVE mode, note measurement values. 10-30 sec in Hold mode 60 sec in LIVE mode
Solid Light (Hold mode only) Measurement is complete.
In Hold mode, captured readings are displayed. In Hold mode, note measurement values. 6 sec

CAUTION: To measure solution at the extremes of the specified temperature or pH range, allow the pen to equilibrate by submerging the sensor in the sample solution for 1 minute prior to taking a measurement.

NOTE: If you cannot dip the pen in the sample solution, pour the sample into a clean container. If you don’t have a container or need to test a vertical stream of solution, use the scoop to hold sample solution.

1. Rinse the pen. If measuring from a container, submerge the pen and swirl it around in FRESH sample solution 3 times. Alternatively, 30 seconds under a stream or of swirling in a body of water is sufficient to prepare the sensor for measurement.
2. Remove pen from solution. (Fill the container one more time with FRESH
sample solution, if applicable.) Then push and release the push button.
3. Grasp the pen by its case with your fingers positioned between the display and
the battery cap to avoid sample contamination.
4. While the LED flashes rapidly, dip the pen in FRESH sample solution so that the sensor is completely submerged. If you do not submerge the sensor in solution before the fl slows, allow the pen to power off and retake the reading.
5. While the LED flashes slowly, swirl the pen around to remove bubbles, keeping
the sensor submerged.
a. In Hold mode when the LED turns on solid, remove the pen from solution.

The display will alternate between the final pH and temperature readings.
Note the readings for your records.
b. In LIVE mode allow the pen to remain in solution while the LED flashes slowly. The display will alternate between live pH and temperature readings. Note the readings for your records. LIVE measurement will time out after 1 minute OR push and release the push button to power the pen off at any time during LIVE measurement.

MyronLMeters.com is the premier internet retailer of the Ultrapen PT2 and other reliable Myron L meters. Save 10% on Myron L meters when you order online HERE.

Categories : Product Updates

Ultrapen PT2 pH Tester Features: MyronLMeters.com

Posted by 3 Apr, 2014

TweetThe ULTRAPEN™ PT2 pH Pen is designed to be extremely accurate, fast and simple to use in diverse water quality applications. Advanced features include automatic temperature compensation; highly stable microprocessor-based circuitry; user-intuitive design; and waterproof housing. A true one- handed instrument, the PT2 is easy to calibrate and easy to use. To take a measurement, […]

The ULTRAPEN™ PT2 pH Pen is designed to be extremely accurate, fast and simple to use in diverse water quality applications. Advanced features include automatic temperature compensation; highly stable microprocessor-based circuitry; user-intuitive design; and waterproof housing. A true one- handed instrument, the PT2 is easy to calibrate and easy to use. To take a measurement, you simply push a button then dip the pen in solution. Results display in seconds.

FEATURES
1. Push Button — turns instrument on; selects mode and unit preferences.
2. Battery Cap — provides access to battery for replacement.
3. Pocket Clip — holds pen to shirt pocket for secure storage.
4. Battery Indicator — indicates charge left in battery.
5. Display — displays measurements, menu options, battery indicator, and firmware revision (during power-up).
6. LED Indicator Light — indicates when to dip instrument in solution, when measurement is in progress, and when to remove instrument from solution.
7. pH Sensor — measures hydrogen ion concentration of solution.
8. Soaker Cap — contains a sponge soaked with pH Sensor Storage Solution to maintain sensor hydration. To remove, twist the soaker cap while pulling off. To replace, fill the soaker cap with storage solution just until the sponge is covered. Pour out any excess solution. Twist the soaker cap while pushing back on.
CAUTION: Do NOT overfill the soaker cap as solution can squirt out while you are pushing the cap back on.
9. Scoop — used to hold sample solution when dipping is not possible. To install, push the scoop onto the sensor
while shifting side-to-side. To remove, pull the scoop off while shifting side-to-side. Verify the pH sensor remained fully inserted into the PT2. If not, reinstall per pH Sensor Replacement, p. 5. To use, pour solution into the scoop or hold the scoop directly under a vertical stream to collect sample.
10. Holster — run your belt through the strap in the back of the holster for hands-free portability.
11. Lanyard — attach through hole in top of pocket clip.

SPECIFICATIONS
pH Temperature
Range: 0.00-14.00pH 0-71°C/32-160°F
Accuracy: ± 0.01pH (After Wet Calibration) ±0.1ºC/±0.1ºF
Repeatability: ± 0.01pH ±0.1ºC/±0.1ºF
Resolution: 0.01pH 0.1ºC/0.1ºF
Time to Reading Stabilization: 10-30 seconds
Power Consumption: Active Mode 37mA, Sleep Mode 2µA
Temperature Compensation: Automatic to 25ºC
Physical Dimensions: 17.15cm L x 1.59cm D or 6.75in. L x 0.625in. D
Weight: 54g/1.9oz. (without soaker cap and lanyard)
Case Material: Anodized Aircraft Aluminum with Protective Coating
Battery Type: N type, Alkaline, 1.5V
Calibration Solutions: pH4, pH7, pH10
Operating/Storage Temperature: 0-55ºC or 32-131ºF
Enclosure Ratings: IP67 and NEMA6
EN61236-1: 2006 – Annex A: 2008: Electrostatic discharge to case of instrument may cause PT2 to spontaneously power on. If this happens, the PT2 will power itself off within seconds.

MyronLMeters.com is the premier internet retailer of the Ultrapen PT2 and other reliable Myron L meters. Save 10% on Myron L meters when you order online HERE.

Categories : Product Updates

The Ultrapen PT-2: MyronLMeters.com

Posted by 12 Jun, 2013

Tweet Myron l Meters Ultrapen PT-2 from Myron L Meters

Myron l Meters Ultrapen PT-2 from Myron L Meters
Categories : Product Updates

Testing Hydroponics System’s Nutrient Solution – MyronLMeters.com

Posted by 3 Apr, 2013

TweetTDS meter Whether or not you’re a newcomer to hydroponic growing, keeping your hydroponic system’s nutrient solution properly balanced with a satisfactory nutrient concentration can be tough. Regular testing of one’s t solution is required if you want to keep the hydroponic system balanced and your plants healthy and growing. The simplest way to keep […]

TDS meter

Whether or not you’re a newcomer to hydroponic growing, keeping your hydroponic system’s nutrient solution properly balanced with a satisfactory nutrient concentration can be tough. Regular testing of one’s t solution is required if you want to keep the hydroponic system balanced and your plants healthy and growing. The simplest way to keep your nutrient solution balanced is via testing. You must check your solution’s pH level and nutrient concentration no less than every couple of days. To be able to try out your solution you need a few basic devices. You need to get a trusted pH tester and either an overall total Dissolved Solids (TDS) meter or perhaps a Conductivity (EC) meter.

pH tester

It is generally agreed that the pH of one’s nutrient solution should be kept slightly acidic using a pH range of 5.5-6.0. You will find exceptions for this generalization. If you are unsure what are the best pH range is for the plants you might be growing, there are many resources open to guide you. You can find three basic means of testing pH. The least expensive technique is paper testing strips. They’re simple to use but could be difficult to learn. Typically the most popular testing way is liquid test kits. This method is extremely accurate and easier to see than paper testing strips but it is also more expensive. An electronic digital pH meter may be the last available option. Digital pH meters are available in various shapes, sizes, and price ranges. The benefit of an electronic pH meter is that it can be really user friendly, fast, and accurate. However, they are the most costly of the testing options, they can break easily, plus they has to be calibrated frequently if you’d like them to remain accurate.

TDS tester

Both conductivity meters and TDS meters are used to look at the strength, or concentration, of your hydroponic nutrient solution. Even though it is crucial that you know the concentration of your solution, this is because measurements ought to be used being a guideline only. EC meters will almost always be measured much the same way. Two sensors they fit within the solution being tested along with a little bit of electricity is emitted by one sensor and received by the other sensor. How well the electricity travels is then based on the EC meter. The harder electricity conducted, the greater the power of solids in the solution. A TDS meter uses the EC after which calculates the amount of solids inside the solution according to among three conversion factors. Considering that the TDS is dependant on a calculation, it really is only a quote of solids in the nutrient solution.

With this particular basic comprehension of the main difference between TDS and conductivity meters you can determine which measurement process is best for you. When you use a packaged nutrient solution, browse the product label to learn which kind of meter the maker recommends. In the event the manufacturer recommends a TDS, they’ll also inform you which conversion step to use as well as the recommended concentration range for his or her product. If you use a homemade nutrient solution plus a TDS meter, a great general guideline is to keep your TDS between 800 and 1200 ppm (ppm). If you work with an EC meter to test your homemade nutrient solution, a good range is 1.0 to 3.0 mS/cm (milisiemens per centimeter).

This information will help keep your hydroponics nutrient solution balanced and your plants healthy.

Myron L Meters has the perfect solution for hydroponics testing – the Ultrapen Combo.

ULTRACOMBO – ULTRAPEN PT1  Conductivity – TDS – Salinity pen & PT2  - pH – Temp Pen

Accuracy of +/-1% of READING (+/-.2% at Calibration Point)
Accuracy of +/- 0.01 pH
Reliable Repeatable Results
Solution modes: KCl, NaCl and 442
Automatic Temperature Compensation
Autoranging
Durable, Fully Potted Circuitry
Comes with 2oz bottle of pH Storage Solution
Waterproof

Ultrapen Combo

List Price: $318.00 

Exclusive Online Price: $280.50

http://www.myronlmeters.com

 

 

 

 

 

 

 

Material Shared via Creative Commons Attribution-Share Alike 2.5 Croatia, original found here: http://blog.dnevnik.hr/nathanielwhite566668/2012/02/1629933596/tds-meter.html

 

 

 

 

Categories : Application Advice, Case Studies & Application Stories, Technical Tips

pH and pH Meters – MyronLMeters.com

Posted by 24 Sep, 2012

TweetWhat is pH? pH measures the activity of the (solvated) hydrogen ion. Pure water has a pH very close to 7 at 25°C. Solutions with a pH less than 7 are acidic and solutions with a pH greater than 7 are basic or alkaline. The pH scale is traceable to a set of standard solutions […]

What is pH?

pH measures the activity of the (solvated) hydrogen ion. Pure water has a pH very close to 7 at 25°C. Solutions with a pH less than 7 are acidic and solutions with a pH greater than 7 are basic or alkaline. The pH scale is traceable to a set of standard solutions whose pH is established by international agreement. Measuring pH for aqueous solutions can be done with a glass electrode and a pH meter, or using indicators.

Measuring pH is important in water treatment, medicine, biology, chemistry, agriculture, forestry, food science, environmental science, oceanography, civil engineering, chemical engineering, and many other applications.

p[H] was first introduced by Danish chemist Søren Peder Lauritz Sørensen at the Carlsberg Laboratory in 1909 and revised to the modern pH in 1924 to accommodate definitions and measurements in terms of electrochemical cells.  According to the Carlsberg Foundation pH stands for “power of hydrogen”.

pH is defined as the decimal logarithm of the reciprocal of the hydrogen ion activity, aH+, in a solution.

pH Meters

A pH meter is an electronic device used for measuring the pH (acidity or alkalinity) of a liquid (though special probes are sometimes used to measure the pH of semi-solid substances). A typical pH meter consists of a special measuring probe (a glass electrode) connected to an electronic meter that measures and displays the pH reading.

The probe

The pH probe measures pH as the activity of the hydrogen cations surrounding a thin-walled glass bulb at its tip. The probe produces a small voltage (about 0.06 volt per pH unit) that is measured and displayed as pH units by the meter. For more information about pH probe care or replacement, please consult your Myron L meter operations manual.

Calibration and use

*Please consult your Myron L meter operations manual before calibrating.

For very precise work the pH meter should be calibrated before each measurement. For normal use calibration should be performed at the beginning of each day. The reason for this is that the glass electrode does not give a reproducible e.m.f. over longer periods of time. Calibration should be performed with at least two standard buffer solutions that span the range of pH values to be measured. For general purposes buffers at pH 4 and pH 10 are acceptable. The pH meter has one control (calibrate) to set the meter reading equal to the value of the first standard buffer and a second control (slope) which is used to adjust the meter reading to the value of the second buffer. A third control allows the temperature to be set. Standard buffer solutions, which can be obtained from MyronLMeters.com here:

http://www.myronlmeters.com/pH-Buffer-Calibration-Solutions-s/82.htm

usually state how the buffer value changes with temperature. For more precise measurements, a three buffer solution calibration is preferred. As pH 7 is essentially, a “zero point” calibration (akin to zeroing a scale), calibrating at pH 7 first, calibrating at the pH closest to the point of interest ( e.g. either 4 or 10) second and checking the third point will provide a more linear accuracy to what is essentially a non-linear problem. Some meters will allow a three point calibration and that is the preferred scheme for the most accurate work, and is recommended by Myron L Meters. Higher quality meters will have a provision to account for temperature coefficient correction, and high-end pH probes have temperature probes built in. The calibration process correlates the voltage produced by the probe (approximately 0.06 volts per pH unit) with the pH scale. After each single measurement, the probe is rinsed with distilled water or deionized water to remove any traces of the solution being measured, blotted with a scientific wipe to absorb any remaining water which could dilute the sample and thus alter the reading, and then quickly immersed in another solution.

Storage conditions of the glass probes

When not in use, the glass probe tip must be kept wet at all times to avoid the pH sensing membrane dehydration and the subsequent dysfunction of the electrode. You can get your sensor storage solution here:

http://www.myronlmeters.com/pH-Storage-Solution-p/s-ssq.htm

A glass electrode alone (i.e., without combined reference electrode) is typically stored immersed in an acidic solution of around pH 3.0. In an emergency, acidified tap water can be used, but distilled or deionised water must never be used for longer-term probe storage as the relatively ionless water “sucks” ions out of the probe membrane through diffusion, which degrades it.

Combined electrodes (glass membrane + reference electrode) are better stored immersed in the bridge electrolyte (often KCl  3 M) to avoid the diffusion of the electrolyte (KCl) out of the liquid junction.

Cleaning and troubleshooting of the glass probes

Occasionally (about once a month), the probe may be cleaned using pH-electrode cleaning solution; generally a 0.1 M solution of hydrochloric acid (HCl) is used, having a pH of one.

In case of strong degradation of the glass membrane performance due to membrane poisoning, diluted hydrofluoric acid (HF < 2 %) can be used to quickly etch (< 1 minute) a thin damaged film of glass. Alternatively a dilute solution of ammonium fluoride (NH4F) can be used. To avoid unexpected problems, the best practice is however to always refer to the electrode manufacturer recommendations or to a classical textbook of analytical chemistry.

Types of pH meters

A pH meter for every industry

pH meters range from simple and inexpensive pen-like devices to complex and expensive laboratory instruments with computer interfaces and several inputs for indicator and temperature measurements to be entered to adjust for the slight variation in pH caused by temperature. Specialty meters and probes are available for use in special applications, harsh environments, etc. Myron L Meters offers a simple pen-style pH meter, analog handheld meters, digital handheld multiparameter meters, and inline monitor/controllers.

Myron L Ultrapen PT2 pH and Temperature Tester

 

 

 

 

 

 

 

 

https://www.myronlmeters.com/Ultrapen-PT2-Multiparameter-Meter-p/dh-up-pt2-ss.htm

ULTRAPEN PT2 pH and Temperature Pen

Accuracy of +/- 0.01 pH

Reliable Repeatable Results

Easy Calibration

Automatic Temperature Compensation

Measures Temperature

Durable, Fully Potted Circuitry

Waterproof

Comes with 2oz bottle of pH Storage Solution

 

 

Myron L AG-6 TDS and pH meter

 

 

 

 

 

 

 

 

 

http://www.myronlmeters.com/Analog-pH-Conductivity-Meter-p/ah-ds-ag6-fslash-ph.htm

 

Agri-Meter – Ag-6: 0-5 millimhos; 2-12 pH

Instant and accurate TDS tests

Electronic Internal Standard for easy field calibration

Fast Auto Temperature Compensation

Rugged design for years of trouble-free testing

Simple to use

 

Myron L Ultrameter II 6P multiparameter meter

 

 

 

 

 

 

 

 

 

http://www.myronlmeters.com/Ultrameter-II-6P-Multiparameter-Meter-p/dh-umii-6pii.htm

 

 

Multi-Parameter: Conductivity, TDS, Resistivity, pH, ORP, Temperature, Free Chlorine (FCE)

+/-1% Accuracy of Reading

Memory Storage: Save up to 100 samples w/ Date & Time stamp

Wireless Download Module Optional

Waterproof

 

Myron L 723II digital inline pH monitor/controller

 

 

 

 

 

 

 

 

 

http://www.myronlmeters.com/Inline-pH-Digital-Monitor-Controller-p/i-dmc-723ii.htm

 

The advanced “isolated” circuitry of the 720 Series II pH/ORP Monitor/ controllers guarantees accurate and reliable measurements — completely eliminating ground-loop and noise issues.

 

The unique sensor preamp allows for longer distances between the sensor and the Monitor/controller without the loss of accuracy or reliability.

 

All Myron L Monitor/controllers feature a highly refined and precise Temperature Compensation circuit. This feature perfectly matches the NERNST equation correcting the displayed reading to 25′C. The TC may be disabled to conform to USP requirements.

 

 

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