Sensorex FCL Free Chlorine Sensor, Amperometric

Overview

Chlorine exists in different chemical forms in solution, including free chlorine (hypochlorite ion and hypochlorous acid) and combined chlorine. Free chlorine is the only form that can perform disinfection, so knowing free chlorine concentration is critical for applications like water and wastewater treatment. FCL free chlorine sensors from Sensorex provide a direct measurement of free chlorine in parts per million (ppm). Using field tested amperometric technology, our FCL sensors perform continuous monitoring without any additional reagents. With a direct 4-20mA output, the FCL sensors can be used with any instrument accepting a 4-20mA input or connected directly to a PLC or SCADA. Direct free chlorine measurement in parts per million (ppm) No reagents requried Direct 4-20mA output Recommended accessories: Maintenance Kit (FCLA-5018): Maximize sensor lifetime by easily replacing membrane cap and fill solution Flow Cell (FC72): Maintains laminar flow across membrane and prevents air bubbles Flow Regulator (FM001): Provides consistent flow for added system stability

Specifications

Documentation

Specifications reproduced from the manufacturer's published product information (sensorex.com), retrieved 18 August 2026. Sensorex is a trademark of its owner. Confirm all specifications with ForeverPure before purchase.