SUP-DM2800 Dissolved Oxygen Meter
The SUP-DM2800 is a membrane-type (polarographic) dissolved oxygen meter measuring 0–20 mg/L or 0–200% saturation with ±1.5% FS accuracy and 0.01 mg/L resolution. It compensates for temperature with NTC10K or Pt1000 sensors and outputs 4–20 mA, RS485 Modbus RTU and an alarm relay (250 VAC, 3 A).
What it does
Aeration blowers are typically the largest energy user in an activated-sludge plant. Holding dissolved oxygen at the setpoint, rather than over-aerating, is one of the most direct ways to reduce that load while protecting nitrification.
The DM2800 provides the DO signal for blower or valve control loops and integrates with SCADA over Modbus.
Technical specifications
| Range | 0–20 mg/L; 0–200%; 0–400 hPa |
|---|---|
| Resolution | 0.01 mg/L; 0.1%; 1 hPa |
| Accuracy / repeatability | ±1.5% FS / ±0.5% FS |
| Principle | Membrane, polarographic |
| Temperature | NTC10K or Pt1000, −10 to 60 °C, ±0.5 °C |
| Output | 4–20 mA (max 750 Ω); RS485 Modbus RTU |
| Relay | 250 VAC, 3 A |
| Power | 220 VAC ±10%, ≤5 W |
| Protection | IP54 |
| Dimensions | 100 × 100 × 150 mm, 0.65 kg |
Summarised from the official Supmea product page. The datasheet for your exact configuration governs. Ask us for it.
Key features
- mg/L, % saturation and partial pressure units
- Analog and digital outputs together
- Alarm relay for low-DO events
- Panel-mount format matching the pH meters
Where it is used
- Water & Wastewater: Aeration basin DO control
- Food & Beverage: Effluent treatment
- Chemical Processing: Biological treatment of process wastewater
Frequently asked questions
What DO setpoint is typical in aeration basins?
Many plants control around 1.5–2.5 mg/L; the right value depends on process design and permit limits.
Membrane or optical DO?
Membrane sensors cost less up front; optical sensors need less maintenance and do not consume oxygen.
Related instruments
Request the SUP-DM2800 datasheet and quotation
Send the medium, pipe size, flow or level range, temperature, pressure and required output. You'll get a recommended model, the datasheet and a quotation.
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- +86 133 6211 7863
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