THREE MODELS 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

FEATURES 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.

SELF-DIAGNOSTIC MESSAGES
	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.

SPECIFICATIONS
	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
ATC	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

CAT. NO.	DESCRIPTION
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)