Hanna HI991003 Waterproof Portable pH/pH-mV

Hanna HI991003 Waterproof Portable pH/pH-mV/ORP/Temperature Meter – Versatile and Rugged for Multi-Parameter Field Use

The Hanna HI991003 Waterproof Portable pH/pH-mV is a compact and waterproof handheld meter designed for the simultaneous measurement of pH, oxidation-reduction potential (ORP), mV, and temperature. Built for on-site water quality monitoring, this versatile instrument combines ease of use, precision, and durability, making it ideal for environmental, industrial, and laboratory applications.

Equipped with the HI1297D pre-amplified pH/ORP probe, featuring an integrated temperature sensor, the HI991003 delivers stable and accurate readings with automatic temperature compensation—even in challenging conditions such as chemical processing, wastewater management, or aquaculture.

Key Features

• Multi-Parameter Measurement

  • pH Range: –2.00 to 16.00 pH

  • ORP (mV) Range: ±1999 mV

  • pH-mV Range: ±825 mV

  • Temperature Range: –5.0 to 105.0°C (23.0 to 221.0°F)

• High Accuracy and Resolution

  • pH Accuracy: ±0.02 pH with 0.01 pH resolution

  • ORP Accuracy: ±2 mV

  • Temperature Accuracy: ±0.5°C (≤60°C); ±1.0°C (>60°C)

• Durable, Pre-Amplified pH/ORP Electrode Included

  • Supplied with the HI1297D probe, featuring:

    • Built-in temperature sensor for ATC

    • DIN connector

    • 1 m (3.3 ft) cable

    • Suitable for both pH and redox potential (ORP) readings

• Automatic Temperature Compensation (ATC)
  Ensures consistent and reliable readings regardless of environmental fluctuations.

• Easy Calibration

  • Automatic one or two-point pH calibration

  • Compatible with two buffer sets: pH 4.01 / 7.01 / 10.01 or pH 4.01 / 6.86 / 9.18

• Waterproof and Built for the Field

  • IP67-rated housing

  • Lightweight and portable

  • Operates in 100% humidity

• Long Battery Life

  • Powered by 3 x AAA (1.5V) batteries

  • Provides up to 1200 hours of continuous use

  • Auto shut-off after 8 minutes of inactivity to save power

Technical Specifications

Ideal Applications

• Water Treatment Plants – Monitor both pH and oxidation-reduction potential in process water

• Industrial Systems – Quality control for chemical dosing, plating baths, or corrosion monitoring

• Environmental Monitoring – Field analysis of natural water bodies (rivers, lakes, aquifers)

• Agriculture & Aquaculture – Ensure optimal water conditions in hydroponics and fish farms

• Laboratories & Education – Multi-use tool for pH, ORP, and temperature experiments