Back To Top
Rosemount™ FCL Free Chlorine Measuring System
rosemount fcl measuring system
The Model FCL is a complete system that measures free chlorine in fresh water.
It includes a transmitter (choice of Model 56 or Model 1056), a 499ACL-01 free chlorine sensor, a pH sensor (if required), and a constant head flow controller. The transmitter and flow controller are mounted on a back plate, and quick disconnect Variopol sensor cables are pre-wired to the transmitter, making installation and startup fast and easy.
Rosemount™ FCL Free Chlorine Measuring System


Measurement Range
0 to 10 ppm as Cl2. For higher ranges, consult the factory.
Accuracy depends on the accuracy of the chemical test used to calibrate the sensor
Ambient Temperature
32 to 122°F (0 to 50°);


  • Complete system includes sensor, connecting cable, analyzer, and flow controller
  • Continuous pH correction eliminates expensive and messy reagents and troublesome sample conditioning systems
  • Measures free chlorine in samples having pH as high as 9.5
  • Variopol quick-disconnect fittings make replacing sensors easy
  • Available with choice of two feature-packed analyzers