Item no. HI-8424
Portable pH/ORP Meter with ATC and HOLD feature HI-8424
Automatic Temperature Compensation
Automatic buffer recognition
Three standard buffer values
Calibration tags on LCD
Low battery indicator
ºC and ºF measurements
HI 8424 is one of the most popular pH meters on the market. This instrument is able to perform pH, ORP and temperature measurements with a high degree of accuracy and fast response.
Calibration is automatic at one or two points with three memorized buffer values (pH 4.01, pH 7.01 and pH 10.01). Once the instrument has been calibrated, the buffer values used during calibration are displayed with tags on the LCD. This feature keeps users informed of the current calibration and helps to avoid taking measurements that are out of range.
Exchange the pH probe for an ORP probe to obtain ORP readings in the mV range.
HI8424 is supplied with HI 1230B pH electrode, HI 7662 temperature probe, battery, protective case and instructions.
|Accuracy mV||±0.2 mV; ±1 mV|
|Accuracy pH||±0.01 pH|
|Accuracy Temperature||±0.4°C / ±0.8°F|
|Battery Type / Life||1 x 9V / approx. 150 hours of continuous use; auto-off after 20 minutes of non-use or dis|
|pH Calibration||automatic, 1 or 2 point with 3 memorized buffer values (4.01, 7.01, 10.01)|
|pH Calibration Offset Calibration||±1 pH|
|pH Calibration Slope Calibration||75 to 110%|
|pH Electrode||HI 1230B, double junction, gel filled PEI (PolyEther-Imide) body, BNC connector, 1 m (3.3') cable (included)|
|Range mV||±699.9 mV; ±1999 mV|
|Range pH||-2.00 to 16.00 pH|
|Range Temperature||-20.0 to 120.0°C / -4.0 to 248.0°F|
|Resolution mV||0.1 mV; 1 mV|
|Resolution pH||0.01 pH|
|Resolution Temperature||0.1°C / 0.1°F|
|Temperature Compensation||Automatic, -20 to 120°C (-4 to 248°F) or manual without temperature probe|
|Temperature Probe||HI 7669AW with 1 m (3.3') cable (included)|