Dissolved Oxygen
IDO Integrated Digital Dissolved Oxygen Sensor
Dissolved Oxygen
Integrated digital luminescent dissolved oxygen sensor — no membranes or electrolyte, virtually maintenance-free, with digital Modbus networking.
- Luminescent principle — no membrane or electrolyte replacement
- Consumes no oxygen; no flow requirement
- Digital RS485 Modbus output, plug-and-play networking
- Immune to H₂S and common ion interference
Overview
A dissolved oxygen sensor continuously measures the concentration of oxygen dissolved in water — the key control signal for aeration and a fundamental indicator of aquatic health.
The IDO Integrated Digital Dissolved Oxygen Sensor operates on the principle of luminescence quenching. When blue light excites a luminescent material on the sensor cap, it emits red light. Oxygen molecules quench this emission by absorbing energy, reducing both the intensity and the lifetime of the red light in inverse proportion to the dissolved oxygen concentration. By measuring the phase shift between the emitted red light and a reference signal and comparing it with internal calibration values, the sensor calculates the dissolved oxygen level.
Typical Applications
Features
- Innovative luminescence-based technology with no flow requirement, no oxygen consumption and no interference from pH, CO₂, NH₄⁺, Cl⁻ or other ions
- Low-energy excitation extends the lifespan of the luminescent cap
- Calibration with standard gas fixture ensures superior measurement accuracy
- Optional brush self-cleaning for fouling environments
Specifications
| Parameter | Specification |
|---|---|
| Measurement Method | Fluorescence method |
| Measuring Range | 0–20 mg/L |
| Accuracy | ±2% or 0.15 mg/L |
| Repeatability | ≤ 0.15 mg/L |
| Resolution | 0.01 mg/L |
| Response Time | ≤ 60 s |
| Temperature Compensation Accuracy | ±0.3 mg/L |
| Temperature Range | 0–50 °C (non-freezing) |
| Protection Rating | IP68 |
| Communication Interface | RS485 interface, Modbus RTU protocol |
| Power Supply | 9–28 VDC |
| Power Consumption | 0.36 W |
| Dimensions | Φ40.5 × 240 mm |
| Material | 316L stainless steel |
Frequently Asked Questions
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Luminescent dissolved oxygen analyzer with no membranes or electrolyte to replace — virtually maintenance-free for harsh wastewater conditions.
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