The HI 9025 is a microprocessor-based pH meter that is housed in a rugged waterproof casings that can measures pH/ORP and temperature.

The Auto-Instruction feature guides the user step-by-step through the calibration process with graphic symbols. The automatic calibration procedure is simple and quick and can be performed at 1 or 2 points selected from 5 memorized buffers: pH 4.01, 6.86, 7.01, 9.18 and 10.01. A stability indicator assures a correct calibration.

This meter also features an automatic shut-off to save battery life.

• Range:  pH:  0.00 to 14.00 pH
• Range:  mV:  ±399.9 mV; ±1999 mV
• Range:  Temperature:  0.0 to 100.0°C / 32 to 212.0°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 (pH 4.01, 6.86, 7.01, 9.18, 10.01); offset calibration: ±1 pH; Slope Calibration: 70 to 108%
• Temperature Compensation:  automatic or manual, -5 to 105°C (23 to 221°F)
• pH Electrode:  HI 1230B double junction, PEI (PolyEther-Imide) body, gel filled, BNC connector and 1 m (3.3') cable (included)
• Temperature Probe:  HI 7669/2W with 1 m (3.3') cable (included)
• Input Impedance:  10¹² Ohm
• Battery Type / Life:  4 x 1.5V AA / approx. 500 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:  196 x 80 x 60 mm (7.7 x 3.1 x 2.4")
• Weight:  500 g (1.1 lb.)

HI 9025 is supplied with HI 1230B pH electrode, HI 7669/2W temperature probe, pH 4 and pH 7 buffer sachets, 100mL plastic beakers, batteries, rugged carrying case and instructions.