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

SKU: HI98129

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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

More Information
SKU HI98129
Product Name Combo pH/Conductivity/TDS Tester (Low Range) - HI98129
Quote Required No
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% 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 x 1.6 x 1.0’’)
Weight 100 g (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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