EziLab Desktop Dissolved Oxygen Meter EZL-DDO121 delivers precise dissolved oxygen concentration and saturation measurements for aquaculture testing, wastewater treatment evaluation, environmental laboratories, scientific research institutes, and educational setting applications. Automatic temperature, salinity, and air pressure compensation ensures stable dissolved oxygen analyzer results across varying test conditions, while high-re display enhances data visibility during continuous monitoring. Rapid sensor response reduces overall analysis time, and excellent measurement stability minimizes drift during extended laboratory studies. Built for long-term performance across demanding analytical environments without frequent recalibration. EziLab's Lab Equipment and water quality analyzers present the complete dissolved oxygen analyzer and desktop DO measurement range for laboratory and research use.



Parameters Concentration, Saturation, Temperature
DO Range 0.00 to 20 mg/L (ppm)
Resolution 0.01/0.1
DO Accuracy ± 0.3 % ± 0.4 mg/L
DO Saturation 0.0 to 200 %
Saturation Resolution 0.001
Saturation Accuracy ± 2.0 % FS
Temperature Measuring Range -10 °C to 110 °C
Temperature Resolution 0.1 °C
Temperature Accuracy ± 0.1 °C
Temperature Compensation Range 0 °C to 100 °C (Automatic)
Salinity Compensation Range 0.0 to 50.0 g/L
Air Pressure Compensation Range 80 to 105 kPa
Air Pressure Resolution 1
Air Pressure Accuracy ± 2 %
Stability ± 0.07 mg/L/1h
Response Time ≤ 30 s (25 °C, 90 % Response)
  • 7-inch screen with high resolution of 1024×600

  • Auto-calibration, auto temperature compensation, data storage USB data export, clock, wireless printing, function setup, smart self-diagnosis

  • Adjustable screen brightness

  • Data storage of 1000 sets of test data can be edited and transferred

  • DO mode have functions of ATC, auto salinity compensation and auto pressure compensation

  • Wireless Bluetooth block

  • Optional PC software and cell phone APP

  • Polarographic DO electrode can measure temp., salinity and DO

  • Equipped with DO electrode calibration sleeve, only need 3 to 5 minutes for polarization

  • Combined diaphragm cap, replace sensitive membrane just by screwing new cap

  • IP54 dustproof and waterproof

  • Optional real time data transmission

  • Desktop DO meter is Polarographic instrument and used with magnetic stirrer

  • Laboratory desktop DO meters are useful in aquaculture, water source monitoring, waste water treatment, environmental monitoring, and other industries, as well as in education and scientific research.

  • DO Meter LO-DDOM100 Series 1 unit

  • Composite DO electrode 1 pc

  • Rotary electrode holder 1 pc

  • 12V Power adapter for instrument 1 pc

  • Membrane cap 3 caps

  • DO electrode electrolyte (30ml) 1 bottle

  • User manual in USB 1 copy