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T: 514-354-2511
T: 1 800 463-4363
F: 514-354-6948
pH Meters

pH Meters

Product Code:Waterproof pHTestrs® Series

Need more Info? (514) 354-2511 - 1-800-463-4363

Waterproof pHTestr® 10 ±0.1 pH accuracy; ATC
Waterproof pHTestr® 20 ±0.01 pH accuracy; ATC
Waterproof pHTestr® 30 ±0.01 pH accuracy; ATC; temperature display


  • Large display screen
  • Up to ±0.01pH accuracy
  • Microprocessor based
  • Three-point (USA or NIST) push-button calibration with buffer recognition
  • User-replaceable double-junction, polymer sensor
  • Simultaneous temperature display in °C or °F (pHTestrs® 30 only)
  • Automatic Temperature Compensation (ATC)
  • Self-diagnostic messages
  • Non-volatile memory
  • Freeze and Auto-off functions


  • LARGE DISPLAY SCREEN Large dual-display LCD for enhanced readability. Important meter functions such as mode, ATC, battery level and temperature (pH 30 only) are clearly displayed for your convenience, at all times. 
  • TEMPERATURE DISPLAY pH 30 displays both the pH and temperature values, simultaneously. pH is displayed on the top of the screen, while temperature i on the secondary display. You can choose to read temperature in °C or °F 
  • CALIBRATION BUFFER SETS Choose either the USA (pH 4.01, pH 7.00 and pH 10.01) or NIST (pH 4.01, pH 6.86 and pH 9.18) buffer sets. 
  • PUSH-BUTTON CALIBRATION WITH BUFFER RECOGNITION Calibration is quick and easy with simple two-button operation. In the calibration mode, your pocket tester auto-detects and displays buffer value in the lower display, minimizing calibration errors. Three-point calibration ensures accuracy across the entire pH scale. 
  • USER-REPLACEABLE DOUBLE-JUNCTION SENSOR Replace the sensor yourself! No tools or messy soldering is necessary. Sensors are equipped with a double-junction construction minimizing reference element poisoning. Replacement sensor is sold separately, below right.
  • NON-VOLATILE MEMORY Your calibration data is safe when you power off or change the batteries. EEPROM retains all the vital information. 
  • AUTO-POWER OFF Meter automatically powers off after 8.5 minutes of nonuse to conserve battery life and save you money. 
  • HOLD FUNCTION Freeze measured values for later reading and recording, especially useful when you are in dimly lit or confined areas.
Battery power level indicator
Or/Ur Over- or under-range, for pH and temperature (pH 30) values
ATC/Or/Ur When blinking, problem associated with the temperature sensor
Er.0 Temperature calibration error
Er.1 pH calibration error

WARRANTY Free from manufacturing defects for 1 year and electrodes for 6 months.

  pHTestr® 10 pHTestr® 20 pHTestr® 30
pH Range -1.0 to 15.0 pH 0 to 14.99 pH -1.0 to 15.0 pH
Resolution 0.1 pH 0.01 pH
Relative Accuracy ±0.1 pH ±0.01 pH
Calibration up to 3 points USA: 4.01/7.00/10.01; NIST: 4.01/6.86/9.18
Calibration buffer option Yes
Temp. Display - - 0-50°C (32-122°F)
Temp. Resolution - - 0.1°C/°F
Temperature Accuracy - - ±0.5°C (±0.9°F)
Temperature Calibration Window - - ±0.5°C (±0.9°F) from default value
Sensor Double juction, Ag/AgCl system with polymer gel
Auto-off After 8.5 minutes from last key press
User Reset Yes
Non-Volatile Memory Backup Yes
LCD Dsiplay Dual 4-digit LCD
Power Requirement Four 1.5V alkaline button cell batteries
Battery Life More than 500 hours
Operating Temperature 0-50°C (32-122°F)
Dimensions (tester) 6.5 x 1.5 in. (LxDia)
Weight (tester) 3oz
Dimensions (boxed) 8.5 x 2.25 x 2 in. (LxWxD)
Weight (boxed) 6oz


OAWD-35634-10 Waterproof pHTestr® 10
OAWD-35634-20 Waterproof pHTestr® 20
OAWD-35634-30 Waterproof pHTestr® 30
OAWD-35624-38 Replacement sensor
OAWD-35624-45 Carrying pouch (soft)
OAWD-35624-16 Alkaline button cell batteries (pack of 6)


Tags: Meters

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