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State-of-the-art Optical DO sensor measures dissolved oxygen in a RELIABLE and EFFORTLESS manner

Minimal maintenance required. Quick and easy calibration

Automatic compensation for salinity, temperature& air pressure

GLP/GMP data management, 500 groups of data storage, USB data output

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

Diameter of the probe cap for the DO803 Luminescent Optical DO Probe: approximately 1.3 inches (3.3 cm)

        DO8500 Portable Optical Dissolved Oxygen Meter Kit with Data logger

        • 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 ±0.2 mg/L,whichever is greater;±2% reading or ±2% saturation,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 or automatic, (0 to 45) ppt


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


          • Data Storage: 500 groups (with time and date)
          • Output: USB
          • 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 DO8500 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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