HI98131 Waterproof pH/EC/TDS/Temperature Tester for Agriculture

The HI98131 is a compact pocket tester designed to monitor nutrient solutions. It features quick calibration, automatic temperature compensation, and a replaceable pH electrode for longer lifespan. Water-resistant design, ideal for field or greenhouse use.

Ranges and Resolutions:

• pH: 0.00 to 14.00; Resolution: 0.01 pH
• Conductivity (EC): 0.00 to 6.00 mS/cm; Resolution: 0.01 mS/cm
• TDS: 0 to 3000 ppm (factor 0.5) or 0 to 3999 ppm (factor 0.7); Resolution: 10 ppm
• Temperature: 0.0 to 60.0 °C ; Resolution: 0.1 °C 

Accuracy:

• pH: ± 0.1 pH (25ºC)
• Conductivity: ± 2% FS (25ºC)
• TDS: ± 2% FS
• Temperature: ± 0.5 °C (25ºC)

Calibration:

• pH: Automatic, 1 or 2 points with standard buffers (pH 4.01, 7.01, 10.01) or quick one-point calibration
• EC / TDS: Automatic, 1 point at 1.41 or 5.00 mS/cm or quick one-point calibration

Temperature Compensation:

• pH: Automatic
• EC / TDS: Automatic, with coefficient set at 1.9% / °C

Battery:

• 4 x 1.5V batteries
• Approx. 100 hours continuous use
• Auto-off after 8 minutes inactivity (adjustable to 60 min or disabled)

Operating Environment:

• Temperature: 0 to 50 °C 
• Max relative humidity: 100%

Dimensions and Weight:

• 163 x 40 x 26 mm
• 100 grams

Package Includes:

• HI98131 meter
• HI73127 pH electrode (replaceable)
• HI73128 electrode removal tool
• 4 x 1.5V batteries
• Instruction manual
• Quality certificate