EziLab offers the Desktop Dissolved Oxygen Meter EZL-DDO121, a benchtop DO meter that reads 0.00 to 20 mg/L (ppm) and 0.0 to 200% saturation at 0.01 mg/L resolution. A polarographic electrode measures DO, temperature, and salinity together, with automatic compensation for temperature from 0 to 100°C, salinity up to 50.0 g/L, and air pressure from 80 to 105 kPa. Readings stay within ±0.07 mg/L per hour and reach 90% response in 30 seconds or less. The included calibration sleeve cuts electrode polarization to 3 to 5 minutes. A 7-inch, 1024 × 600 screen shows results, while 1000-set storage, USB export, and Bluetooth move data off the meter, with optional PC software and mobile app. The IP54 body, rotary electrode holder, replaceable membrane caps, electrolyte, and 12 V adapter come standard. As a dissolved oxygen analyzer, it gives lab staff fast, compensated readings for BOD work, process checks, and compliance sampling. Aquaculture farms track oxygen in ponds and tanks, while water utilities monitor source water. Wastewater treatment plants check aeration basins and effluent, environmental agencies sample rivers and lakes, and schools and research labs study water chemistry. See the Dissolved Oxygen Meters and Desktop Dissolved Oxygen Meter pages for full specifications.
| 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
| • | Tracks dissolved oxygen in aquaculture ponds and tanks, reading 0.00 to 20 mg/L and 0.0 to 200% saturation. |
| • | Monitors aeration basins and effluent at wastewater treatment plants, with automatic salinity and air pressure compensation. |
| • | Samples rivers and lakes for environmental monitoring, storing 1,000 sets of test data and exporting them by USB or Bluetooth. |
| • | Checks water sources and utility supplies at the bench, with a 7-inch screen and IP54 protection. |
| • | Supports BOD work and compliance sampling, with a calibration sleeve that cuts electrode polarization to 3 to 5 minutes and a magnetic stirrer setup. |
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
