HI 8424

Portable pH/ORP Meter with ATC and HOLD feature
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.

Specifications
Range  pH  -2.00 to 16.00 pH
ORP  ±699.9 mV; ±1999 mV
Temperature  -20.0 to 120.0°C / -4.0 to 248.0°F
Resolution  pH  0.01 pH
ORP  0.1 mV; 1 mV
Temperature  0.1°C / 0.1°F
Accuracy  pH  ±0.01 pH
ORP  ±0.2 mV; ±1 mV
Temperature  ±0.4°C / ±0.8°F
Calibration  pH  automatic, 1 or 2 point with 3 memorized buffer values (4.01, 7.01, 10.01)
Offset  ±1 pH
Slope  75 to 110%
Input Impedance  1012 Ohm
Temperature Compensation  Automatic, -20 to 120°C (-4 to 248°F) or manual without temperature probe
pH Electrode  HI 1230B PEI body pH electrode with BNC connector and 1 m (3.3’) cable (included)
Temperature Probe
HI 7662 stainless steel temperatures probe with 1 m cable (included)
Battery Type / Life  9V / approximately 150 hours of continuous use; auto-off after 20 minutes of non-use or disabled (user-selectable)
Environment  0 to 50°C (32 to 122°F); RH max 100%
Dimensions  164 x 76 x 45 mm (6.5 x 3.0 x 1.8″)
Weight  180 g (6.3 oz.)

Accessories
Electrodes
HI 1230B  Combination pH Electrode, for Field Applications
BNC Connection
HI 3230B  ORP Electrode for Municipal Water and Quality Control
BNC Connection
Solutions
HI 7061L  General Purpose Cleaning Solution
1 x 500 mL bottle
HI 5004L  pH 4.01 buffer solution
HI 5007L  pH 7.01 buffer solution
HI 5010L  pH 10.01 buffer solution
HI 70300L  Electrode Storage Solution
1 x 500 mL bottle
Accessories
HI 710015  Shockproof Silicone Boot
HI 8424 Style Casing, Blue
HI 710016  Shockproof Silicone Boot
HI 8424 Style Casing, Orange
Probes
HI 7662  Stainless Steel Temperature Probe