24/7 Technical Support
Hanna HI 9125N  Portable pH/mV Meter with Enhanced Design Hanna Get Quote



The HI 9125N heavy-duty waterproof pH/mV meter has been designed with the latest microprocessor technology to provide laboratory results and accuracy under harsh industrial conditions.

A large dual-level LCD displays the pH and temperature simultaneously. Graphic symbols are provided for helping the user during the calibration process.

The pH calibration procedure is automatic with 5 memorized buffer values (4.01, 6.86, 7.01, 9.18 and 10.01), buffer recognition to avoid errors and automatic temperature compensation.

The HI 9125N can be used with ORP (Oxidation Reduction Potential) electrodes. The resolution automatically switch from 0.1 to 1 mV when the reading exceeds 400 mV.

The meter is also provided with the BEPS (Battery Error Prevention System) feature, which automatically turns the instrument off when the battery level is too low to ensure reliable readings.

  • Slim Design
  • Flat Back for Better Grip
  • New Larger LCD
  • Tutorial messages displayed
  • Electrode Diagnostics

Order Information:

HI 9125N is supplied with HI 1230B combination double-junction, gel-filled pH electrode, HI 7669/2W stainless steel temperature probe with 1 m (3.3') cable, pH 4.01 & pH 7.01 buffer solutions (20 mL sachets), 100 mL plastic beaker, instruction manual and rugged carrying case.

Technical Specifications

Range pH -2.00 to 16.00 pH
Range mV ±699.9 mV; ±1999 mV
Range Temperature 20.0 to 120.0°C / -4.0°F to 248.0°F
Resolution pH 0.01 pH
Resolution mV 0.1 mV; 1 mV
Resolution Temperature 0.1 °C / 0.1 °F
Accuracy pH ±0.01 pH
Accuracy mV ±0.2 mV; ±1 mV
Accuracy Temperature ±0.4 °C / ±0.8 °F
pH Calibration automatic 1 or 2 point with 5 memorized buffer values (4.01, 6.86, 7.01, 9.18, 10.01)
Offset Calibration ±1 pH
Slope Calibration From 80 to 108%
Temperature Compensation automatic or manual, -20 to 120°C (-4 to 248°F)
pH Electrode HI 1230B, double junction, gel filled, BNC connector and 1 m (3.3’) cable (included)
Temperature Probe HI 7662 with 1 m (3.3’) cable (included)
Input Impedance 1012 Ohm
Battery Type / Life 1.5V AAA / approx 200 hours of continuous use (with backlight off); auto-off after 20 minutes of non-use (can be disabled)
Environment 0 to 50°C (32 to 122°F); RH max 100%
Dimensions 185 x 72 x 36 mm (7.3 x 2.8 x 1.4’’)
Weight 300 g (10.6 oz.)