Search This Site

(Search by Product Type i.e. Level or Brand Name i.e. Walchem)

FCL Amperometric Free Chlorine Sensor

FCL Amperometric Free Chlorine Sensor

Process,Chlorine,Dioxide,Sensor,SensorexChlorine 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


  • Measurement Range: 0-2 ppm, 0-5 ppm, or 0-10ppm free chlorine

  • Temperature Range: 0-45° C

  • pH Range: 5.5 – 8.5 pH

  • Membrane Cap Material: PVC Housing, Proprietary Membrane Technology

  • Pressure Range: 0 – 14.7 PSIG

  • Temperature Compensation: Integrated Automatic Temperature Compensation (ATC)

  • Cable Length: 10 feet (3 meters)

  • Sensor Output: 4-20mA

  • Flow Range: 0.2 – 0.6 gpm (45 l/hr – 135 l/hr)

  • Connector: Tinned Leads

  • Supply Voltage: 12-24V DC (250mA minimum)

  • Cross Sensitivity: Chlorine Dioxide, Ozone, Bromine, Iodine

  • Warranty: One year limited warranty

FCL Amperometric Free Chlorine Sensor



About Us

Metex Corporation Limited has been providing superior products and services to the process control, chemical treatment, waste water, industrial and manufacturing industries for over 25 years. It is our goal to continually provide our customers with the best possible equipment, technology, and service.


Our Products

Dataloggers, sensors, pumps, recorders, hand held instruments, flow instrumentation, level controls, valves, instrumentation, containers, tanks, transmitters, data loggers, digital indicators, mixers and agitators, pressure intrumentation, analyzers and controllers for a variety of industrial applications such as water quality, pH/ORP and more.

Website Content

Water Analyzers and Controllers, Wireless Products, Corrosion Monitoring Equipment, Cooling Tower and Boiler Controllers, a wide variety of Pumps, Valves, Dataloggers and Recorders, HVAC, Instrumentation, Skids and Systems, Containers and Tanks from world leading manufacturers are products you will find on this site.

Get in Touch