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£628.30 £753.96 (Inc. VAT)

Product Description

HI-991003 Extended Range pH Meter with pH/ORP electrode & °C sensor

  • pH range of -2.00 to 16.00
  • 2 year manufacturer warranty

The HI-991003 is ideal for plating baths, wastewater, swimming pool and spa water quality

and environmental applications. This meter 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 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.

Key features:

  • pH Sensor Check; Allows users to check electrode status at any time
  • Multi-level LCD display; Display the current measurement simultaneously with the current


  • On-screen tutorial messages
  • Automatic Temperature Compensation
  • Automatic one or two point calibration
  • HI-1297 pH/ORP/Temperature and HI 1296 pH/Temperature probe in titanium


  • BEPS; (Battery Error Prevention System)
  • Compact, heavy-duty, and water resistant

Each meter is supplied complete with:

  • HI-1297D pH/ORP probe with internal temperature sensor
  • Starter pack of buffer and cleaning solutions
  • Batteries and instructions
  • HI-700601 Electrode cleaning solution (2 sachets)
  • Rugged carrying case


Protective rubber holsters are a popular option for the HI- 991001 meter. Available to buy

separately Blue or Orange rubber, they encase the meter in a flexible neoprene shell and

offer protection against accidental damage resulting from drops and spills. When used in the

field the rubber holsters make the meters easy to hold with wet hands.

  • HI-710023 – Holster in Orange
  • HI-710024 – Holster in Blue

pH Range -2.00 to 16.00 pH*
pH-mV Range ±825 mV
mV Range ±1999 mV
Temperature Range -5.0 to 105.0°C / 23.0 to 221.0°F
pH Resolution 0.01 pH
pH-mV Resolution 1 mV
mV Resolution 1 mV
Temperature Resolution 0.1°C / 0.1°F
pH Calibration automatic, 1 or 2 point with 2 sets of memorised buffer values
(pH 4.01 / 7.01 / 10.01 or pH 4.01 / 6.86 / 9.18)
Temperature Compensation Automatic, -5 to 105°C (23 to 221°F)
Electrode HI 1297D, amplified, combination pH/ORP electrode with
internal temperature sensor, DIN connector and 1 m (3.3′) cable (included)
Battery Type / Life 3 x 1.5V AA / approx. 1500 hours of continuous use:
auto-off after 8 minutes of non-use
Environment 0 to 50°C (32 to 122°F); RH max 100%
Dimensions 150 x 80 x 36 mm (5.9 x 3.1 x 1.4″)
Weight 210 g (7.4 oz.)

Please call for more information on this product.

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