Low Range pH/EC/TDS Pocket Tester (HI98129)

The Hanna Instruments HI98129 measures pH, conductivity, TDS and temperature in a single lightweight, waterproof pocket tester. It is designed for hydroponics, aquariums, pools and tanks, where quick readings are needed without switching instruments.

All pH, EC and TDS readings are automatically temperature compensated. For EC and TDS, the conversion factor (0.45 to 1.00) and the β compensation coefficient can be adjusted. The pH electrode comes in a replaceable cartridge with an extendable cloth junction, so the meter is not thrown away when the sensor wears out; the conductivity probe is graphite, which does not get contaminated by salt deposits.

• Three sensors in one meter, plus temperature readout in °C or °F.
• Floats if dropped into the sample.
• Stability indicator and HOLD button to freeze the reading.
• BEPS system shuts the meter off if the battery is too low for an accurate reading.
• Auto shut-off after 8 minutes of inactivity.

Technical data

• pH: 0.00 to 14.00 pH; resolution 0.01; accuracy ±0.05 pH
• Conductivity: 0 to 3999 µS/cm; resolution 1 µS/cm; accuracy ±2% F.S.
• TDS: 0 to 2000 ppm (mg/L); resolution 1 ppm; accuracy ±2% F.S.
• Temperature: 0.0 to 60.0 °C; resolution 0.1 °C; accuracy ±0.5 °C
• pH calibration: automatic, one or two points (4.01 / 7.01 / 10.01 or 4.01 / 6.86 / 9.18)
• EC/TDS calibration: automatic, one point (1413 µS/cm / 1382 ppm)
• pH electrode: HI73127, replaceable (included)
• Batteries: 4 × 1.5 V, about 100 hours of continuous use
• Dimensions: 163 × 40 × 26 mm
• Weight: 100 g

Includes: HI73127 pH electrode, HI73128 electrode removal tool, batteries and instruction manual.