FirstRate FST-100-YL106 Smart Residual Chlorine Sensor, 0-20mg/L, RS485 Modbus & 4-20mA Output
The FirstRate FST-100-YL106 is a smart residual chlorine sensor designed for continuous online monitoring in water treatment systems. It provides dual 4-20mA analog and RS485 Modbus-RTU digital outputs for seamless integration with PLCs, SCADA, and industrial data loggers, ensuring precise measurement of chlorine levels from 0 to 20 mg/L.
Features
- High-precision residual chlorine measurement with 0.01 mg/L resolution.
- Dual output: 4-20mA analog signal and RS485 Modbus-RTU digital communication.
- Robust IP68-rated housing constructed from PC plastic and stainless steel.
- Wide operating temperature range of 0 to 60°C and withstands pressures up to 3 bar.
- Supports versatile drop-in or pipe socket installation for water treatment systems.
Out of stock
The FST-100-YL106 employs an amperometric sensing principle for the accurate, continuous detection of free residual chlorine in aqueous solutions. Its integrated temperature sensor provides automatic compensation to maintain measurement accuracy (±0.2°C) across varying environmental conditions, making it suitable for harsh water treatment environments.
Engineered for industrial reliability, the sensor’s PC and stainless steel construction, combined with an IP68 ingress protection rating, ensures long-term operation in high-humidity and pressurized applications such as drinking water disinfection, reverse osmosis pre-treatment, and industrial process water monitoring. The dual-output capability allows for flexible system integration, supporting both legacy 4-20mA control loops and modern RS485-based Modbus RTU networks for centralized data acquisition.
Additional Information
| Weight | 0.411 kg |
|---|---|
| Dimensions | 28 × 9 × 9 cm |













