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Equipped with state-of-the-art Optical DO sensor: measures dissolved oxygen level in a RELIABLE and EFFORTLESS manner

Minimal maintenance required. Easy calibration

IP67 waterproof and dust-proof structure, ideal to be used in harsh environments

Comes with a complete test kit, including the meter, 10 ft optical probe, calibration cap, and a rugged carrying case

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

        DO850 Portable Dissolved Oxygen Meter Kit

        • Dissolved Oxygen

          • Dynamic Range: (0-20.00) mg/L (ppm), (0-200.0)%
          • Resolution: 0.01/0.1mg/L (ppm), 0.1/1%
          • Accuracy: ±2% reading or ±2% saturation, whichever is greater; ±2% reading or ±0.2 mg/L, whichever is greater
          • Response Time: ≤30 s (25℃ , 90% response)
          • Calibration Points: Saturation Point & Zero Oxygen
          • Temperature Compensation: Automatic, (0 to 50)℃
          • Pressure Compensation: Automatic, (60 to 120) kPa
          • Salinity Compensation: Manual, (0 to 45) ppt


          • Range: (0 to 50.0) ℃
          • Resolution: 0.1 ℃
          • Accuracy: ±0.5 ℃


          • Batteries: AA x 3 (1.5V×3)
          • IP Rating: IP57
          • Dimensions and Weight: Meter: 88×170×33 mm/313g; With case: 360×270×76 mm/1.3kg
          • Product Certificate: RoHs, CE
        • The warranty period of the DO850 instrument (only the instrument) is 3 years from the date of purchase. That of DO803 optical DO probe (excluding sensor cap) is 2 years from the date of purchase. That of DO8032 sensor cap is 1 year from the date of purchase. If the above products or parts within the warranty period are not functional due to raw material defects or poor manufacturing, they are free for repair or replacement.


          This limited warranty does NOT cover any issues due to:

          • Accidental damage
          • Improper use
          • Normal wear and tear
          • Transportation
          • Storage
          • Failure to follow the product instructions
          • Unauthorized maintenance, modifications, combination or use with any products, materials, processes, systems or other matter
          • Unauthorized repair
          • External causes such as accidents, abuse, or other actions or events beyond our reasonable control.
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