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WaterTechw² Free Chlorine (FCL) Sensor

The WaterTechw² FCL sensor is ideal for monitoring free chlorine in drinking water, seawater, process water, swimming pool, wastewater applications.

The enhanced amperometric sensor is enhanced with a third, reference electrode which eliminates zero drift and the unique design means that pH compensation is not usually required. This combination of features removes the needs for buffers and reagents and keeps operator maintenance to a minimum and delivers exceptionally low cost of ownership.

The sensor integrates with the WaterWatch² product range and the 7300w² Monitor allowing the sensor to be combined with pH, Redox, Turbidity and other measurements, keeping installation costs and space requirements down. The 7300w² monitor is rightly recognised as one of the easiest to use monitors on the market avoiding any need for specialist training.

For specialist advice call:

+44 (0)1726 879800

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  • General Specification
  • Measurement Specification
DimensionsElectrode Body - 220 mm x 25 mm diameter
Protection ClassIP65
Electrode BodyPVC-U, PEEK, Stainless Steel, microporous hydrophilic membrane
Cable EntriesIntegral Cable Gland
Cable Length1 metre
Environmental Data
Operating Temperature0 to 45°C
Pressure3 Bar, no pressure surges and/or fluctuations
Power Supply12 Volts from monitor
Interface to monitorRS485
Accuracy<1% of measured value or 0.01 mg/l
Range0 to 5ppm (mg/l)
Resolution0.01 ppm (mg/l)
Measurement PrincipleMembrane covered, amperometric, 3-electrode system
EPA 334.0 Compliant
Response TimeT90 = approx. 2 minutes
pH Range4 to 9 pH
InterferencesChlorine Dioxide, Ozone
Service RequirementMembrane & electrode replacement every 12 months
Regular calibration is required using a DPD test kit

7300w² Monitor

The core product in the WaterWatch² range - the 7300w² Monitor provides all the user interface and system configuration

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