DO8500 Portable Optical Dissolved Oxygen Meter Kit


The APERA Instruments DO850 Dissolved Oxygen Meter is equipped with ultramodern optical sensor for dissolved oxygen measurements. Equipped with state-of-the-art Optical DO sensor: measures dissolved oxygen level in a RELIABLE and EFFORTLESS manner

Minimal maintenance required. Easy calibration

State of the art Luminescent Optical DO Sensor

  • No Membrane, No Solution, No Hassle.
  • Quick & Accurate Measurements
  • The DO probe/sensor/tester does not consume oxygen. No limit on water flowing speed.
  • Maintenance-free. No need to calibrate before every use.
  • The service life of the luminescent cap is over 8000 hours. No need to replace the cap every year.
  • The special coating on the luminescent cap makes it anti-interference and unaffected by light and chemicals.
  • A calibration cap comes with the probe, which allows it to be calibrated and stored in saturated air.

Intelligent Instrumentation

  • Auto Salinity Compensation; Auto Temperature Compensation; Auto Air Pressure (barometric) Compensation
  • Large backlit LCD screen, simultaneously displaying dissolved oxygen reading and temperature. Easy switch from mg/L and % to ppm and %.
  • GLP data management: 500 sets of data storage; USB output and power supply.
  • Advanced digital processing technology, supporting stable reading and auto-lock display modes.
  • IP67 Waterproof dust-proof rating allows the meter to be used in harsh environments.
  • Foldable stand allows use as a benchtop meter.
  • Cable Length: up to 10 ft
  • Comes with a rugged carrying case, which includes a Dissolved Oxygen Meter, an Optical DO Probe, and the accessories.


Dissolved Oxygen

Measuring Range

0 to 200 %; 0-20.0 mg/l


0.1/1 %, 0.01/0.1 mg/l (ppm)


±2 % of reading or ±2 % of saturation;

±2 % of reading or ±0.2 mg/l (ppm), whichever is greater

Response time

90 % in ≤30 s (25 ℃ )

Calibration points

Saturated oxygen & zero oxygen

Temperature compensation

0 to 50 ℃ (automatic)

Air pressure compensation

60 to 120 kPa (automatic)

Salinity compensation

0-45 ppt (automatic)


Measuring Range

0 to 50 °C


0.1 °C


±0.5 °C


Data Storage

500 groups (with time and date)

Data output


Power Supply

3 x AA Batteries

IP Rating



88×170×33 mm (with case 360×270×76 mm)


313 g (with case 1.3kg)


RoHs, CE


  • DO850 Portable Optical Dissolved Oxygen Meter
  • DO803 Optical Dissolved Oxygen Probe (3 Meter)
  • Conductivity Electrode 2301 (3 Meter)
  • Probe Calibration Sleeve
  • Combined electrode clip
  • Small Screwdriver
  • PC-Link Communication Software disk
  • USB Communication Cable
  • Carrying Case
  • Sponge for Water Storage (spare)
  • Instruction Manual

3-Year warranty with the instrument, 2-year with the probe.

Bedienungsanleitung (DO8500_de.pdf, 1,666 Kb) [Download]

English (DO8500_EN.pdf, 1,792 Kb) [Download]

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