Horiba OM-71-2 Portable Dissolved Oxygen Meter (2m Cable)

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This dissolved oxygen meter is waterproof and field ready. It comes with a dissolved oxygen sensor with a 2 meter long cable for easy field measurement.

Horiba OM-71-2 Portable Dissolved Oxygen Meter (2m Cable)




  • Waterproof and field ready design
  • Measures dissolved oxygen concentration (DO), oxygen concentration (O2), saturation (SAT.RATIO) and temperature of aqueous solutions
  • Uses a durable field sensor for DO measurements and laboratory sensor for BOD measurements
  • Integral RS-232C port for connection to a PC or printer
  • Measurement data memory function stores 1,000 data points
  • Bright backlit display
  • Comes with a 2 meter cable (OM-71-2), 10 meter cable (OM-71-10) or laboratory Biochemical Oxygen Demand kit (OM-71-L1)
  • Replaceable sensor tips for minimizing electrode costs

This field ready meter is ideal for testing dissolved oxygen levels in ponds, lakes, streams, tanks and any other water sample. It features a Horiba 9520-10D field probe which has a 2 meter long cable and is immersible in samples.


Determining the dissolved oxygen content of samples is a great way to determine the organic quality of water. Water samples containing very low dissolved oxygen levels cannot support aerobic life forms.


This meter also has the ability to test for the biochemical oxygen demand of a water sample. This is simply the amount of dissolved oxygen needed by aerobic biological organisms in a body of water to break down organic material present over a specific period of time. Testing of the BOD is typically done in a lab and monitors the amount of oxygen consumed over a period of time.


The Horiba OM-71 meter can use a variety of dissolved oxygen sensors to best suit the testing situation at hand.




  • Measurement Method: Membrane galvanic cell
  • Measurement Range (Temperature): 0.0 - 100.0: Resolution 0.1C
  • Measurement Range (Dissolved Oxygen): 0.00 - 20.00mg/L Resolution 0.01mg/L
  • Measurement Range (Saturation Oxygen): 0.0 - 200.0% Resolution 0.1%
  • Measurement Range (Oxygen): 0.0 - 50.0% Resolution 0.1%
  • Repeatability (Temperature): ±0.1C ±1digit
  • Repeatability (Dissolved Oxygen): ±0.1mg/L ±1digit
  • Operating ambient temperature/humidity: 0℃ to 45℃, 80% or less in relative humidity (no condensation)
  • Power: LR03/AAA alkaline batteries or AAA Ni-H rechargeable batteries × 2, AC adapter 100 V to 240 V 50/60 Hz (optional)
  • Current consumption: Less than 2 mA
  • Battery life (without backlight or accessories): Approx. 500 hours
  • Dimensions: Approx. 67 (80) × 28 (42) × 170 mm (The figures in parentheses are maximum thicknesses)
  • Weight (without batteries and electrode): Approx. 270 g

Unit Ship Weight: 3 lbs

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