Yokogawa's DO71 and DO72 optical oxygen sensors are designed to deliver accurate and stable dissolved oxygen measurements in various water applications. By using a fluorescence phase-shifting method, these sensors are less sensitive to contaminants compared to traditional methods, resulting in more accurate measurements. The flat sensor surface and stainless steel housing make them robust and easy to clean. With a fast response time of less than 90 seconds and no warm-up time, they can quickly adapt to changes in oxygen concentration. The sensors are also equipped with smart functionality that enables communication with various Modbus HOST devices, including Yokogawa's FLXA402 analyser series.
Features & benefits
- Easy to clean and long-term stability: The flat sensor surface and stainless steel housing make the sensors robust and easy to clean, contributing to long-term stability.
- Excellent maintenance opportunity: Maintenance is limited to replacing the oxygen exchange cap at the tip of the sensor, which can be done easily without tools.
- Support for different measurement environments: DO71 and DO72-W (0 to 22.5 mg/L) are suitable for a wide range of applications, including wastewater treatment and process control. DO72-T (0 to 2 mg/L) is ideal for low concentration applications such as SWAS.
- Easy measurement installation: The FLXA402 analyser can connect various sensors, including pH, conductivity and oxygen sensors, allowing customisation according to process requirements.
Applications
- Water and wastewater treatment: Monitoring of oxygen levels in wastewater treatment plants and activated sludge processes.
- Fish farming: Ensuring optimal oxygen levels for fish health and growth.
- Chemical and petrochemical industry: Monitoring oxygen concentrations in different processes to ensure product quality and safety.
- The power industry: Controlling oxygen levels in water to prevent corrosion and optimise efficiency in power plants.
Specifications
| Parameter | DO71 (with cable) | DO72-W (Brett area) | DO72-T (Track level) |
|---|---|---|---|
| Measurement area | 0 to 22,5 mg/L | 0 to 22,5 mg/L | 0 to 2 mg/L |
| Cables | Integrated type | Separate type | Separate type |
| Working temperature | 0 to 50°C | 0 to 50°C | 0 to 50°C |
| Pressures | 0 to 300 kPa | 0 to 1200 kPa | 0 to 1200 kPa |
| Flow rate | Max 2 m/s | Max 2 m/s | Max 2 m/s |
| Response time | ≤ 90 sec (90% response) | ≤ 90 sec (90% response) | ≤ 90 sec (90% response) |
