HI 991003

Portable pH/pH-mV/ORP and Temperature Meter
HI 991003 is ideal for plating baths, wastewater, swimming pool and spa water quality and environmental applications.

HI 991003 is a portable pH/pH-mV/ORP/temperature meter with our unique Sensor Check™ feature that allows the user to determine the electrode status at any time.

The HI 1297D pH/ORP/temperature probe features an easy to clean recessed tip that  prevents solids in solutions from collecting on the sensor. The AISI 316 stainless steel and titanium body of these probes function as a potential matching pin for increased stability of readings and extended sensor life.

This compact instrument fits in the palm of your hand and the bottom probe connection ensures the electrode cable doesn’t get in  your way.

Specifications 
Range pH -2.00 to 16.00 pH
pH-mV ±825 mV (pH-mV)
ORP ±1999 mV
Temperature -5.0 to 105.0°C; 23.0 to 221.0°F
Resolution pH 0.01 pH
pH-mV 1 mV
ORP 1 mV
Temperature 0.1°C/0.1°F
Accuracy
@ 20°C pH ±0.02 pH
pH-mV ±1 mV
ORP ±2 mV
Temperature ±0.5°C up to 60°C; ±1.0°C (outside); ±1.0°F up to 140°F; ±2.0°F (outside)
pH Calibration  automatic one or two point calibration with two sets of memorized buffers (standard 4.01, 7.01, 10.01 or NIST 4.01, 6.86, 9.18)
Temperature
Compensation  automatic, -5.0 to 105.0°C (23.0 to 221.0°F)
Electrode  HI 1297D pre-amplified pH/ORP probe with internal temperature sensor, DIN connector and 1 m (3.3’) cable (included)
Battery
Type/Life  1.5V (3) AAA / approximately 1200 hours of continuous use. auto-off after eight minutes of non-use
Environment  0 to 50°C (32 to 122°F); RH max. 100%
Dimensions  152 x 58 x 30 mm (6.0 x 2.3 x 1.2”)
Weight  205 g (7.2 oz.)

Accessories
Electrodes
HI 1297D  pH/ORP Electrode for Water Treatment Applications
Solutions
HI 5004L  pH 4.01 buffer solution
HI 5007L  pH 7.01 buffer solution
HI 5010L  pH 10.01 buffer solution
HI 7020L  ORP Test Solution at 200/275 mV (@20°C)
1 x 500 mL bottle
HI 7061L  General Purpose Cleaning Solution
1 x 500 mL bottle
HI 70300L  Electrode Storage Solution
1 x 500 mL bottle
Accessories
HI 710023  Shockproof Rubber Boot
Streamlined Style Casing, Orange
HI 710024  Shockproof Rubber Boot
Streamlined Style Casing, Blue