Sensorex Free Chlorine Sensors

Perform continuous monitoring without any additional reagents.


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, 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 required
  • Direct 4-20mA output

Sensorex Free Chlorine Sensor
Model Number Description Price
FCL502 Free Chlorine Sensor, 0-2 ppm, 4-20mA $1384.75
FCL505 Free Chlorine Sensor, 0-5 ppm, 4-20mA $1384.75
FCL510 Free Chlorine Sensor, 0-10 ppm, 4-20mA Call for Pricing