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Stuart Carbolite Hach




Pack Size: EACH

Product Information

Technical specification


ORP (HI-991002 only)



-2.00 to 16.00


-5 to 105.0°C









pH calibration

Automatic 1 or 2 points 4.01, 7.01, 10.01 or 6.86, 7.01, 9.18.

Temp. Compensation

Automatic from -5 to 105°C

Battery life

1500 hours continuous use approx.


Waterproof hand held pH/ORP/C meters

Two new IP67 waterproof pH meters with the latest probe technology and extended measuring range. Ideal for field or factory use, as the meters are tough and simple to use. The HI-991001 reads both pH and temperature with one probe, and the HI-991002 has a combination probe to measure pH, temperature and also ORP. Both meters have a simple two-button operation. Unit displays pH/ORP and temperature simultaneously on a large LCD screen, with a stability indicator. Calibration is automatic at one or two points with just one button. The user can select between two programmed buffer sets, and screen symbols guide the user through the procedure. When the meter is turned on a battery check advises in percentages the amount of power left. The meter will also retain data during battery replacement. For demanding applications both meters use a stainless steel multi-parameter probe fitted with an amplifier to exclude interference. Supplied complete with electrode, battery, wrist strap and buffer solutions in a hard carry case.


PH/35106   Replacement probe for HI-991001
PH/35108   Replacement probe for HI-991002
PH/35110   Probe for semi solids/direct soil testing
PH/35112   Probe for general food, dairy products
PH/35114   Meat probe
PH/35116   Surface (flat tip) probe
PH/35118   Accessory kit with protective rubber boot,
calibration sachets and carry case with foam insert.