This fluoride ion sensor is an industrial ion-selective electrode (ISE) for continuous online detection of fluoride ions in water.It adopts high-selectivity fluoride sensitive membrane, effectively resisting interfering ions, with automatic temperature compensation to ensure accurate and stable reading.
Integrated digital RS485 Modbus-RTU output, IP68 submersible, 3/4" NPT thread installation.Widely used in chemical wastewater, electroplating industry, mine drainage, environmental monitoring, surface water and factory sewage discharge detection.
The fluoride ion sensor is a digital online ISE (ion selective electrode) sensor, designed for continuous real-time monitoring of free fluoride ion content in water. It adopts high-precision LaF₃ single crystal sensitive membrane, features high selectivity, strong anti interference performance and reagent free operation
Working Principle
Based on Nernst equation, the LaF₃ crystal membrane produces a stable potential difference corresponding to fluoride ion activity. Built-in temperature sensor realizes automatic temperature compensation. The internal circuit converts analog signal into digital signal, output via RS485 Modbus RTU.
Core Features
1.High specific selectivity for fluoride ions, effectively resisting most common anions interference.
2.Integrated temperature compensation, ensuring stable measurement in fluctuating water temperature.
3.Digital RS485 communication, long transmission distance, anti-EMI, easy for PLC and DCS connection.
4.Reagent-free design, low operation cost and simple daily maintenance.
5.Submersible IP68 structure, suitable for tanks, pipelines and open water.
Main Interference & Solution
Hydroxide ion (OH⁻): control pH within 5–8
Metal ions (Al³⁺ / Fe³⁺): mask with complexing agent
High salinity: adjust ionic strength to reduce measurement deviation
Maintenance Instructions
Perform two-point regular calibration with standard fluoride solution.
Gently clean the crystal membrane with soft cloth to remove dirt.
Keep the sensing membrane wet; avoid long-term drying.
Replace the sensitive membrane regularly in harsh water quality.
Application Fields
Drinking water plant
municipal wastewater
industrial wastewater (electroplating, chemical, mining)
surface water & groundwater quality monitoring
semiconductor factory water
industrial process water
Technical Parameter
|
Measurement range |
1.8-35000ppm |
|
|
pH range |
2-12pH |
|
|
Resolution |
0.001ppm |
|
|
Accuracy |
±5%FS |
|
|
Temperature range |
0-60℃ |
|
|
Slope |
56±4mV(25℃) |
|
|
Sensing element |
Solid film |
|
|
Reproducibility |
±3% |
|
|
membrane resistor |
<50MΩ |
|
|
Signal Output |
4-20mA(Adjustable/Three-wire) |
|
|
Current accuracy |
1%FS |
|
|
Output load |
<750Ω |
|
|
Data Communication |
RS485(MODBUS-RTU) |
|
|
Power Supply |
DC 9-30V(12VRecommend) |
|
|
Pressure range |
0-3 Bar |
|
|
Shell Material |
PC+Stainless steel |
|
|
Thread |
G3/4,G1 |
|
|
Line length |
5-meter standard(customizable) |
|
|
Electrical connection |
Pin-type |
|
|
Protection Level |
IP68 |
|
|
Installation Method |
Immersive |
|
|
Known interference |
Cn-,Br-,OH-,-,S2-,NH3 |
|
|
Warranty |
6 months |
Product Application
