
Liquid analysis
A clearer view of water quality
Connect analytical measurement to treatment and process control

Membrane-type dissolved oxygen measurement with analog and digital integration.
Select the measurement range, process connection and output configuration for your application.
The DM2800 uses a polarographic measurement approach with a membrane-type sensor. Dissolved oxygen depends on temperature, pressure and salinity, so these conditions should be considered when configuring the measurement. The local LCD presents oxygen and medium temperature, with current output, Modbus communication and alarm control.
Values below describe the listed product family. Optional ranges and functions depend on the selected configuration.
| Parameter | Specification |
|---|---|
| Measurement ranges | 0–20 mg/L; 0–200%; 0–400 hPa |
| Resolution | 0.01 mg/L; 0.1%; 1 hPa |
| Accuracy | ±1.5% FS |
| Repeatability | ±0.5% FS |
| Temperature range | −10 to 60 °C |
| Temperature element | NTC10K or Pt1000 |
| Analog output | 4–20 mA; maximum loop 750 Ω |
| Communication | RS485, Modbus-RTU |
| Alarm relay | 250 VAC / 3 A |
| Operating temperature | 0–60 °C |
| Power supply | 220 VAC ±10%, 50/60 Hz; maximum 5 W |
| Dimensions | 100 × 100 × 150 mm |
| Ingress protection | IP54 |
Confirm the final measuring range, material compatibility, operating limits and applicable approvals for the exact configuration before ordering. Product appearance may vary by version.