Hanna HI991001-03 Waterproof Portable pH/Temperature

Hanna HI991001-03 Waterproof Portable pH/Temperature Meter – Rugged, Accurate, and Field-Ready

The Hanna HI991001-03 Waterproof Portable pH/Temperature is a compact, waterproof portable meter designed for fast and accurate pH and temperature measurements in field and laboratory environments. Engineered with simplicity and durability in mind, this meter features automatic temperature compensation, intuitive calibration, and a titanium-body pH probe that withstands demanding conditions such as water treatment, environmental monitoring, and industrial processing.

Equipped with CAL Check™ diagnostics, pH sensor integrity checks, and a long-lasting battery, the HI991001-03 offers dependable performance where reliability and portability are essential.

Key Features

• Dual-Range pH Accuracy and Automatic Temperature Compensation

  • Measures pH from –2.00 to 16.00

  • Resolution: 0.01 or 0.1 pH

  • Accuracy: ±0.02 pH (high-resolution mode)

  • Built-in temperature sensor ensures ATC from –5.0 to 105.0 °C

• High-Quality Titanium pH Electrode Included

  • Supplied with the HI12963 pre-amplified probe featuring:

    • Titanium body for chemical resistance

    • Internal temperature sensor

    • Quick Connect DIN plug

    • 1 m (3.3 ft) cable

• Built-In Diagnostics & CAL Check™

  • Real-time probe condition indicator

  • Sensor integrity check ensures electrode performance

  • On-screen guidance for calibration status and stability

• User-Friendly Operation

  • Automatic calibration with 1 or 2 points

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

  • Simple interface with dual-line LCD display for simultaneous pH and temperature readings

• Built for Harsh Environments

  • IP67 waterproof protection

  • Operates in 100% relative humidity

  • Compact and lightweight design for handheld field use

• Extended Battery Life and Auto-Off Function

  • Runs on 3 x AAA batteries for up to 1400 hours

  • Selectable auto shut-off (8 min, 60 min, or disabled)

Technical Specifications

Ideal Applications

• Water Treatment & Industrial Use – Reliable field readings in wastewater, process water, and treatment tanks

• Environmental Testing – On-site pH and temperature monitoring in lakes, streams, or groundwater

• General Laboratory Use – Quick spot-checks and calibration reference testing

• Education & Quality Control – Durable, accurate instrument for teaching or internal validation