SS316 Material RS485 Modbus RTU Digital Dissolved Oxygen Sensor For Wastewater Treatment Industry
Daruifuno's OPD890 dissolved oxygen sensor sensor uses optical measurement technology based on the principle of fluorescence quenching, which is reliable and accurate, and does not require frequent calibration. The sensor does not require consumables or maintenance during use, which can greatly reduce the cost of use. The only consumption is to replace the membrane cap every two years. Since the sensor does not consume oxygen during measurement, the dissolved oxygen sensor can be used in most measurement environments, even in scenarios with very low flow rates.
Advantages and features of fluorescence dissolved oxygen OPD790
1. No electrolyte and membrane required, more durable
The electrolyte and oxygen permeable membrane in traditional electrodes are not used, and the structure is simpler. It avoids problems such as membrane pollution, aging, and breakage, and reduces maintenance frequency and cost.
2. Maintenance-free and long-term stability
The fluorescence sensor almost does not need to replace consumables regularly, and the maintenance cycle is longer. It is suitable for long-term online monitoring, with good data stability and small drift.
3. Strong anti-interference ability
Not affected by the flow rate in the water (no agitator or circulation pool is required to ensure the flow rate). It has strong anti-pollution ability and has little effect on oil, suspended matter, bubbles, etc. It is more suitable for highly polluted water bodies or low flow rate environments.
4. Fast response speed
The fluorescence quenching reaction is very rapid, and the response time is generally less than 60 seconds, which is suitable for dynamic monitoring.
5. Low power consumption design
Suitable for battery-powered systems, especially for outdoor and aquatic buoys.
6. Accurate measurement and good repeatability
High precision, low drift, and repeatability better than traditional polarography. Especially suitable for application scenarios that require high precision and long-term online monitoring.
7. High degree of intelligence
Can be directly connected to the SCADA system through digital signal output (MODBUS). Supports remote calibration, fault diagnosis and data transmission.
Specification:
| Measuring principle | Fluorescence principle |
| Measuring range | Saturation: 0~200% Dissolved oxygen: 0.00~20.00mg/L Temperature: 0.0~50.0℃ |
| Resolution | Saturation: 0.1% Dissolved oxygen: 0.01mg/L Temperature: 0.1℃ |
| Accuracy | Saturation: ±1% Dissolved oxygen: ±0.1mg/L Temperature: ±0.2℃ |
| Response time | T90 less than 60s |
| TEMP compensation | Built-in temperature unit, full range automatic compensation |
| Calibration method | One-point (100%) or two-point (100% and 0%) |
| Working temperature | 0 to 50°C |
| Storage temperature | -10~60℃ |
| Working pressure | 0~3Bar |
| Waterproof level | IP68 |
| Power requirements | DC 9~24V |
| Power consumption | About 0.7W |
| Communication Interface | RS485 MODBUS |
| Shell material | Stainless steel SUS 316 and Titanium alloy membrane cap |
| Sensor dimension | Diameter 37mm, total length about 276mm |
| Connection method | M16 |
| Installation size | 1-inch NPT thread at both ends |
| Weight | Approx. 800g (without cable) |
| Cable | Standard 10 meters, can be customized length |
Brief introduction:
- Support handheld devices and in-situ applications
- Adopt optical measurement technology based on Fluorescence principle,Reduce maintenance work(no need to replace electrolyte), reducing operating costs
- The sensor does not require consumables or maintenance during use, can greatly reduce the cost of use
- Low sensor drift and longer calibration interval
- Without consuming oxygen, accurate measurement can be achievedwhen oxygen concentrationis low
- All-in-one package, the dissolved oxygen sensor can be used with the online transmitters, DTU, and portable instruments
- RS485 interface, Modbus RTU,support access to standard industrial control system
- The protection grade is IP68, can work continuously and stably under water for a long time
- Internal storage of calibration data, support offline calibration, plug and play on site,Fast response time
- Optional cleaning nozzle for underwater cleaning
- Low sensor drift and longer calibration intervals
- No polarization required before use
- No minimum flow rate requirement (does not consume oxygen)
Daruifuno's OPD890 dissolved oxygen sensor has 1"NPT threads at both ends:
1. Universal standard, strong compatibility
NPT (National Pipe Thread) is an American standard for tapered pipe threads, widely used in the field of industrial fluid connections. The 1-inch diameter is the universal size of most sensors and pipeline interfaces, and is easy to match with existing equipment.
2. Threads at both ends, supporting multiple installation directions
Both ends have threads: one end can be used for installation, and the other end can be connected to an extension rod, a sheath or a reverse fixing accessory to improve adaptability. It supports multiple installation methods such as insertion, immersion, and pipeline bypass.
3. Good sealing and strong anti-leakage ability
NPT is a tapered thread. The thread part becomes tighter as it is screwed. Combined with sealing tape or thread glue, reliable sealing can be achieved to avoid water seepage or pollution.
4. Stable installation and good seismic performance
Compared with snap-on or sliding installation, the threaded fixing structure is more reliable, especially safer and more reliable under conditions such as flow velocity impact and vibration.
Aplication:
◇ Sewage: long-term online, high stability, strong anti-pollution
◇ Surface water monitoring:strong anti-interference, suitable for low flow rate environment in the wild
◇ Aquaculture water bodies: Fast response, suitable for dynamic change scenarios
◇ Urban sewage treatment
◇ Industrial wastewater treatment
◇ Aquarium: fast response, suitable for dynamic change scenarios
◇Drinking water plant: no reagents, less maintenance, clean and hygienic
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SS316 Material RS485 Modbus RTU Digital Dissolved Oxygen Sensor For Wastewater Treatment Industry Images
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