RS485 Optical Water Dissolved Oxygen Sensor For Industrial Sewage Water Treatment

                                RS485 Optical Water Dissolved Oxygen Sensor For Industrial Sewage Water Treatment
 
Daruifuno's OPD790 dissolved oxygen sensor uses the fluorescence method to measure dissolved oxygen. The core is the "fluorescence quenching principle": excitation light of a specific wavelength is irradiated onto a fluorescent sensitive material (such as platinum or ruthenium dye). In the absence of oxygen interference, the fluorescence intensity or lifetime is stable; oxygen molecules will "quench" the fluorescence, causing its lifetime to shorten and the intensity to decrease; the dissolved oxygen concentration is calculated by detecting the change in fluorescence lifetime.
 

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:

Brief introduction:

• Support handheld devices and in-situ applications
• Adopt optical measurement technology based on Fluorescence principle
• 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
• Optional cleaning nozzle for underwater cleaning

Please click the user manual of DO sensor here:
OPD79 dissolved oxygen user manual.pdf

Daruifuno's OPD790 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