Hanna Instruments Canada
The Hanna Advantage: A Worldwide Leader in Technology and Innovation 100% Quality  360 Value
Contact Hanna: (800) 842-6629
Hanna Instruments Canada
Customer Support: (800) 842-6629

Portable Dissolved Oxygen Meter - HI9142


In stock

The HI9142 is a rugged, portable, waterproof dissolved oxygen (DO) meter, with replaceable polytetrafluoroethylene (PTFE) membrane caps and protective shield, designed to provide reliable measurements under harsh environmental conditions. The HI9142 is supplied complete with polarographic probe, PTFE membrane caps, electrolyte fill solution, protective shield, and rugged carrying case.

  • Easily Replaceable Membrane Caps
  • Waterproof
  • One or Two Point Calibration



Replaceable, pretensioned, polytetrafluoroethylene (PTFE) membranes with a screw cap design for simple filling of electrolyte and easy replacement.

Polarographic measuring system based on the Ross and Clark polarographic measurement method

The probe uses a platinum cathode and silver anode in an electrolyte solution using  external voltage to establish a current proportional to the concentration of dissolved oxygen

Manual one or two point calibration at 100% and automatic calibration in zero oxygen solution

A high-accuracy, built-in linearized thermistor temperature sensor behind a stainless steel cover

All readings are automatically compensated for temperature variations

Additional information

Weight 1.36 kg

Dissolved, Oxygen

Temperature Accuracy

±0.2°C (±1°F) (excluding probe error)

Temperature Range

-5.0 to 50.0°C (23.0 to 122.0°F)


SKU HI9142
Name Portable Dissolved Oxygen Meter – HI9142
Dissolved Oxygen Measurement Type polarographic
Dissolved Oxygen Range 0.0 to 19.9 mg/L (ppm)
Dissolved Oxygen Resolution 0.1 mg/L (ppm)
Dissolved Oxygen Accuracy ±1.5% F.S.
Dissolved Oxygen Calibration manual in 100%; automatic in 0% DO
Dissolved Oxygen Temperature Compensation automatic, 0 to 50°C (32 to 122°F)
Temperature Range -5.0 to 50.0°C (23.0 to 122.0°F)
Temperature Resolution 0.1°C (1°F)
Temperature Accuracy ±0.2°C (±1°F) (excluding probe error)
DO Probe HI 76407 with 4 m (13′) cable (included)
Automatic Shut-Off After approx. 8 minutes
Battery Type/Life 1.5V AA (4) / approx. 500 hours of use
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 in.)
Weight 500 g (1.1 lb.)

Ordering Info

HI9142 is supplied complete with HI76407 DO probe, HI76407A/P pre-formed PTFE DO membranes (2), HI7041S electrolyte solution (30 mL), batteries, instructions and rugged carrying case.


Portable Dissolved Oxygen Meter – HI9142