Combo pH/Conductivity/TDS Tester (Low Range) – HI98129

The HI98129 makes measuring pH quick and easy! This lightweight, waterproof tester offers high accuracy pH, low range EC/TDS (0 to 3999 µS/cm EC/ 0 to 2000 ppm TDS) and temperature measurements in a single handheld unit! No more switching between meters for your routine measurements.



Waterproof and designed to float in water
Replaceable pH electrode with extractable junction
Selectable 0.45 or 1.0 EC to TDS conversion factor


  • pH electrode, amperometric EC/TDS sensor, and temperature probe in a single meter
  • pH range is from 0.00 to 14.00 pH
  • Automatic Temperature Compensation (ATC), displays temperature in °C or °F
  • Large LCD displays stability indicator, low battery indicator, and calibration tags
  • HOLD button for easier measurement recording
  • Graphite sensor reduces polarization effects and does not oxidize
  • Battery Error Prevention System (BEPS)
  • Automatic shut-off with three user controlled settings


SKU: HI98129

Product Name: Combo pH/Conductivity/TDS Tester (Low Range) – HI98129

Quote Required: Yes

pH Range: 0.00 to 14.00 pH

pH Resolution: 0.01 pH

pH Accuracy: ±0.05 pH

pH Calibration: automatic, at one or two points with two sets of standard buffers (pH 4.01 /7.01/10.01 or pH 4.01 / 6.86 / 9.18)

pH Temperature: Compensation automatic

EC Range: 0 to 3999 μS/cm

EC Resolution: 1 μS/cm

EC Accuracy: ±2%/6 F.S.

EC Calibration: automatic, one-point at

TDS Range: 0 to 2000 ppm (mg/L)

TDS Resolution: 1 ppm (mg/L)

TDS Accuracy :±2% F.S.

TDS Calibration: automatic, one-point at

EC/TDS Temperature Compensation: automatic with β adjustable from 0.0 to 2.4%/ °C

EC to TDS Conversion Factor: 0.45 to 1.00

Temperature Range: 0.0 to 60.0°C/ 32.0 to 140.0°F

Temperature Resolution: 0.1°C / 0.1°F

Temperature Accuracy: ±0.5°C /±1°F

pH Electrode: HI73127 (replaceable; Included)

Battery Type/Life: 1.5V (4) / approx. 100 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: 163 x 40 x 26 mm (6.4 x1.6 x1.0″)

Weight: 100g (3.5 oz)

Ordering information: HI98129 is supplied with HI73127 pH electrode and HI73128 electrode removal tool, batteries (4 x 1.5V) and instructions.

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