Hanna HI 8424 Portable pH/ ORP Meter with ATC and HOLD feature

Automatic calibration
Automatic Temperature Compensation
Automatic buffer recognition
Three standard buffer values
Calibration tags on LCD
Low battery indicator
Auto shut-off
HOLD function
º C and º F 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.

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.)