Hanna HI8424 Microprocessor pH/mV meter

Hanna HI8424 Microprocessor pH/mV Meter – Compact, Accurate, and Trusted Worldwide

The Hanna HI8424 Microprocessor pH/mV meter is a compact, reliable digital pH/mV meter equipped with microprocessor technology for high-accuracy measurements in the laboratory, field, or industrial environments. With automatic temperature compensation, two-point calibration, and a wide measurement range, it remains one of Hanna’s most popular portable meters for professionals who demand consistency and ease of use.

Key Features

• Dual Function: pH and mV Measurement
  Ideal for both pH analysis and ORP/REDOX applications. Offers wide measurement ranges:

  • pH: –2.00 to 16.00

  • mV: ±699.9 mV and ±1999 mV (auto-ranging)

• Automatic Temperature Compensation (ATC)
  Ensures accurate pH readings with real-time compensation from –20.0 to 120.0°C (–4.0 to 248.0°F) using the included stainless steel temperature probe.

• Easy One or Two-Point Calibration
  Perform automatic calibration at one or two points using three standard buffers (pH 4.01, 7.01, and 10.01). Slope efficiency is displayed (75–110%) for easy electrode validation.

• High Accuracy and Resolution

  • pH Accuracy: ±0.01 pH

  • mV Accuracy: ±0.2 mV (low range) / ±1 mV (high range)

  • Temperature Accuracy: ±0.4°C

• Lightweight and Ergonomic Design
  Only 180 g with a compact 164 x 76 x 45 mm footprint—ideal for handheld use in the field or space-saving operation in laboratories.

• Battery-Powered with Auto-Off
  Powered by a 9V battery offering up to 150 hours of continuous use. Auto shut-off after 20 minutes of inactivity (can be disabled).

Specifications

pH Measurement

• Range: –2.00 to 16.00 pH

• Resolution: 0.01 pH

• Accuracy: ±0.01 pH

• Calibration: Automatic, one or two points (pH 4.01, 7.01, 10.01)

• Slope Range: 75 to 110%, ±1 pH

• Input Impedance: 10¹² Ohms

mV Measurement

• Range: ±699.9 mV / ±1999 mV

• Resolution: 0.1 mV / 1 mV

• Accuracy: ±0.2 mV (low range) / ±1 mV (high range)

Temperature Measurement

• Range: –20.0 to 120.0°C (–4.0 to 248.0°F)

• Resolution: 0.1°C / 0.1°F

• Accuracy: ±0.4°C / ±0.8°F

• Compensation: Automatic (with probe) or manual (without probe)

Included Probes

• pH Electrode: HI1230B PEI-body pH electrode, BNC connector, 1 m cable

• Temperature Probe: HI7662 stainless steel probe, 1 m cable

Power and Environmental Conditions

• Battery: 9V

• Battery Life: ~150 hours

• Auto-Off: After 20 minutes of inactivity (can be disabled)

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

• Dimensions: 164 x 76 x 45 mm (6.5 x 3.0 x 1.8 in)

• Weight: 180 g (6.3 oz.)

Applications

The HI8424 is ideal for:

• Water & Wastewater Treatment – Accurate pH and ORP monitoring

• Agriculture & Hydroponics – Nutrient solution management

• Food & Beverage Industry – pH control during production

• Educational Use – Widely used in schools and universities for lab experiments

• Environmental Monitoring – Field testing of lakes, rivers, and groundwater