DO850 optical oxygen meter


Plus 19% MwSt. DE

The Apera Instruments DO850 oxygen meter is equipped with a state-of-the-art optical sensor for dissolved oxygen measurements. The optical sensor has no membrane and requires no special solutions. You will get a stable reading in 1 to 3 minutes. The sensor has a lifetime of up to 8000 hours of operation. The special coating on the cap protects the sensor from external influences and enables measurements independent of available light and chemicals. The meter is waterproof and dustproof (IP57 protection rating), allowing it to work in harsh environments.

  • Equipped with state-of-the-art optical oxygen sensor: reliable and effortless measurement of dissolved oxygen in 1-3 min
  • The sensor has a lifetime of up to 8000 hours operating time
  • Measuring device incl. foldable stand
  • Easy calibration, minimal maintenance
  • The special coating on the luminescent cap makes it anti-interference and unaffected by light and chemicals.
  • The special coating of the DO8032 electrode cap prevents interference and makes it resistant to light and chemicals
  • IP57 protection level: water and dust protected design
  • Complete set incl. Sensor with 3m cable, calibration cap and rugged carrying case

The meter has the EC marking and a warranty of three years on the device (two years on electrodes).

Technical Specifications

Dissolved oxygen (DO) Measuring range 0 to 200 %; 0-20.0 mg/l
Resolution 0.1 / 1 %; 0.01 / 0.1 mg/l (ppm)
Accuracy ±2% of the display or ±2% of the saturation;

±2 % of the display or ±0.2 mg/l (ppm), the larger value counts in each case

Response time 90 % in ≤30 s (at 25 ℃ )
Calibration points Saturation point & zero point
Temperature compensation 0 to 50 ℃ (automatic)
Air pressure compensation 60 to 120 kPa (automatic)
Salt content compensation 0-45 ppt (manual)
Temperature Measuring range 0 to 50 °C
Resolution 0,1 °C
Accuracy ±0.5 °C
more Power supply 3 x AA batteries
Housing protection class IP57
Size 88×170×33 mm

(with case 360×270×76 mm)

Weight 313

(with case 1,3kg)

Certification RoHs, CE & ISO9001:2015

scope of delivery

A complete set contains:

  • DO850 Meter
  • DO803 Optical electrode for dissolved oxygen
  • Electrode calibration cap
  • Small screwdriver
  • Sponge as water reservoir (replacement)
  • operation manual
  • Carrying case


German DO850 DE
English DO850 EN