The Desktop Dissolved Oxygen Meter EZL-DDO121 measures dissolved oxygen in mg/L, ppm, or % saturation with a water-resistant membrane keypad and a simultaneous temperature display. The temperature measurement range falls from -10 °C to 110 °C with DO accuracy of ± 0.3 % and ± 0.4 %. An automatic pressure compensation of 80 kPa to 105 kPa can improve measurement precision and built-in automatic temperature compensation (ATC) of 0 °C to 100 °C for temperature variations.

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