RTM Dissolved Oxygen Sensor
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A. Product Overview
RTM-ANL-DO-SENS-22380 is an online optical dissolved oxygen sensor used for measuring dissolved oxygen levels in water and wastewater applications. It is suitable for continuous monitoring where dissolved oxygen is an important parameter for treatment efficiency, aeration control and process stability.
The sensor uses fluorescent optical technology instead of traditional electrochemical membrane-based measurement. This makes it suitable for long-term online use because it does not require electrolyte filling, has no oxygen consumption during measurement and is not dependent on flow rate.
RTM-ANL-DO-SENS-22380 provides RS485 output with Modbus communication, making it suitable for connection with controllers, PLC, SCADA and online monitoring systems. The built-in temperature sensor provides automatic temperature compensation for stable readings in changing water conditions.
With IP68 protection and submersible installation, the sensor is suitable for aeration tanks, wastewater channels, treated water tanks, fish farming tanks, process water tanks and other continuous water quality monitoring points.
B. Working Principle
RTM-ANL-DO-SENS-22380 works on the fluorescence lifetime principle. The sensor uses fluorescent material and light excitation to measure the dissolved oxygen present in water.
When the sensing surface is exposed to water, oxygen molecules affect the fluorescence signal. The sensor measures the change in fluorescence lifetime and converts it into a dissolved oxygen value. This method does not consume oxygen during measurement, so it does not require a minimum flow rate.
Unlike traditional membrane-type dissolved oxygen sensors, this optical sensor does not require electrolyte replacement and has no membrane maintenance requirement in normal operation. The hydrophobic membrane design helps reduce algae adhesion on the membrane head, improving long-term measurement stability.
The built-in NTC temperature sensor measures water temperature and applies automatic temperature compensation. The final dissolved oxygen value is transmitted digitally through RS485 Modbus output to a controller, PLC, SCADA or monitoring system.
C. Why It Is Used
RTM-ANL-DO-SENS-22380 is used to continuously monitor dissolved oxygen levels in water and wastewater systems. Dissolved oxygen is an important parameter in biological treatment, aeration efficiency, aquatic life support and water quality control.
In STP and ETP plants, dissolved oxygen monitoring helps operators maintain proper aeration in biological treatment tanks. Too little oxygen can reduce treatment efficiency, while too much aeration increases energy consumption. Online DO measurement helps improve process control and reduce unnecessary blower operation.
In aquaculture, dissolved oxygen monitoring helps maintain a healthy oxygen level for fish and aquatic organisms. In water treatment and environmental monitoring, DO measurement helps track water quality and biological activity.
Main reasons for using RTM-ANL-DO-SENS-22380 include:
- Continuous online dissolved oxygen monitoring
- Better aeration control in STP and ETP plants
- Energy saving by avoiding over-aeration
- Stable measurement using optical fluorescence technology
- No electrolyte requirement and low maintenance operation
- No oxygen consumption and no flow restriction
- RS485 Modbus output for digital monitoring
- Automatic temperature compensation for reliable readings
- IP68 submersible design for field installation
- SS316 housing for industrial water and wastewater applications
D. Suitable Buyers
RTM-ANL-DO-SENS-22380 is suitable for customers who need reliable online dissolved oxygen monitoring in water and wastewater applications.
Suitable buyers include:
- STP plant manufacturers
- ETP plant manufacturers
- Wastewater treatment plant operators
- Water treatment companies
- Aquaculture and fish farming operators
- Industrial effluent treatment plants
- Municipal sewage treatment plants
- Common effluent treatment plants
- Environmental monitoring companies
- Panel builders and system integrators
- PLC and SCADA automation companies
- Pharma industry utility departments
- Chemical and process industries
- Food and beverage wastewater treatment plants
- Research laboratories and water quality testing teams
- Maintenance and purchase departments looking for online DO sensors
FAQ
1. What is RTM-ANL-DO-SENS-22380?
RTM-ANL-DO-SENS-22380 is an online optical dissolved oxygen sensor used for continuous DO measurement in water, wastewater, STP, ETP, aquaculture and industrial water quality applications.
2. What technology does this dissolved oxygen sensor use?
It uses fluorescence lifetime technology with high-performance fluorescent material for dissolved oxygen measurement.
3. What is the measuring range of RTM-ANL-DO-SENS-22380?
The measuring range is 0 to 20 mg/l dissolved oxygen.
4. What is the response time of the sensor?
The response time is 4 seconds.
5. What is the accuracy of this sensor?
The catalog mentions 1 percent accuracy.
6. Does the sensor support digital communication?
Yes, the sensor has RS485 output and supports Modbus communication.
7. Can this sensor be connected to PLC or SCADA?
Yes, the RS485 Modbus output allows connection with PLC, SCADA, controller or online monitoring systems.
8. Does this sensor need electrolyte?
No, this optical dissolved oxygen sensor does not require electrolyte, which reduces maintenance compared to traditional membrane-type DO sensors.
9. Does this sensor consume oxygen during measurement?
No, the sensor does not consume oxygen during measurement. This helps avoid flow restriction and makes it suitable for online monitoring applications.
10. Does the sensor require flow in the water?
No, the catalog mentions no flow rate limitation, so it can be used in tanks, channels and process water applications.
11. Is RTM-ANL-DO-SENS-22380 suitable for submersible installation?
Yes, the sensor has IP68 protection and is suitable for submersible installation.
12. What is the housing material of the sensor?
The housing material is SS316.
13. Does the sensor have temperature compensation?
Yes, it has a built-in NTC temperature sensor and automatic temperature compensation.
14. What is the temperature range of this sensor?
The temperature range is 0 to 50 degrees Celsius.
15. What is the temperature accuracy?
The temperature accuracy is plus or minus 0.2 degrees Celsius.
16. What cable length options are available?
The catalog mentions 10 meter or 15 meter cable length options.
17. What is the maximum working pressure?
The maximum working pressure is 3 bar.
18. What is the fluorescent cap life?
The fluorescent cap life is approximately 1 year as per the catalog.
19. Where is this sensor commonly used?
It is commonly used in STP, ETP, wastewater treatment, aeration tanks, aquaculture, fish farming, water treatment plants, industrial effluent monitoring and environmental water quality systems.
20. Who should buy RTM-ANL-DO-SENS-22380?
This product is suitable for STP and ETP manufacturers, wastewater treatment companies, aquaculture users, municipal plants, industrial utility departments, system integrators, panel builders and automation companies.