HI 8424N pH meter View larger

HI 8424N pH meter


New product

HI 8424N is a microprocessor- based pH meter. HI 8424N can also measure ORP in the mV range using ORP electrodes (available separately).

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Measures pH, ORP & Temp (with ORP probe available separately)

By utilizing an advanced, custom microprocessor, HI 8424N is able to perform pH, ORP and temperature measurements with high accuracy and fast response. The mV measurements automatically switch from 0.1 to 1mV resolution when the reading reaches ±699.9mV.

Simple to Operate

The Auto-Instruction feature guides the user step-by-step through the calibration process with graphic symbols. The automatic calibration procedure is simple and quick and can be performed at 1 or 2 points selected from 5 memorized buffers: pH 4.01, 6.86, 7.01, 9.18, 10.01. A stability indicator assures a correct calibration.

HI 8424N is supplied complete with HI 1230B pH electrode, HI 7669/2W temperature probe, pH 4 and pH 7 buffer sachets, 100 mL plastic beaker, batteries, rugged carrying case and instructions. 

Note:The pH standard solutions included with this meter are small packets to get you started. Additional calibration solutions are available separately.


Range pH: 0.00 to 14.00 pH

Range mV: ±399.9 mV; ±1999 mV

Range Temp: 0.0 to 100.0°C / 32.0°F to 212.0°F

Resolution pH: 0.01 pH

Resolution mV: 0.1 mV; 1 mV

Resolution Temp: 0.1°C / 0.1°F

Accuracy (@20°C/68°F) pH: ±0.01 pH

Accuracy (@20°C/68°F) mV: ±0.2 mV; ±1 mV

Accuracy (@20°C/68°F) Temp: ±0.4°C / ±0.8°F

pH Calibration: automatic, 1 or 2 point with 5 memorized buffer values (pH 4.01, 6.86, 7.01, 9.18, 10.01); offset calibration: ±1 pH; slope calibration: 70 to 108%

Temp. Compensation: automatic or manual, -5 to 105°C (23°F to 221°F)

pH Electrode: HI 1230B, double junction, PEI® body, gel filled, BNC connector and 1 m cable (included)

Temp. Probe: HI 7669/2W with 1 m (3.3’) cable (included)

Battery Type / Life: 4 x 1.5V AA / approx. 500 hours of continuous use; auto-off after 20 minutes of non-use (can be disabled)

Environment: 0 to 50°C (32 to 122°F); RH max 100%

Dimensions: 196 x 80 x 60 mm (7.7 x 3.1 x 2.4’’)

Weight: 500 g (1.1 lb.)