The Ion Selective Sensor combines eco-friendly design with advanced measurement capabilities, ideal for water quality monitoring in diverse environments. Featuring an isolated power supply for stable performance (±5% accuracy) and anti-interference, it supports custom calibration via forward/reverse curves and multiple ion types (NH4+, NO3-, K+, Ca²+, etc.). Built with durable polymer plastic, its compact design (31mm*200mm) and RS-485 MODBUS output ensure seamless integration into industrial, municipal, or environmental systems. Suitable for surface water, sewage, and potable water testing, this sensor delivers reliable data while minimizing maintenance with its easy-to-clean, pollution-resistant structure.