MTS offers Chlorine analysers from Pi that are used in many applications requiring the measurement and control of online residual chlorine levels in water. The HaloSense range is suitable for total or free residual chlorine monitoring or control applications in potable water, seawater, process water, swimming pool water, waste water, food washing, paper and pulp, etc.

The HaloSense range of controllers/transmitters means that you get exactly what you need and nothing that you don’t. From a low cost no-frills chlorine dosing controller (CRONOS®) to a highly sophisticated colour display, remote access controller (CRIUS®) – and all with the same great sensors! Chlorine dosing control is now simpler and cheaper than ever! Both instruments can have multiple sensors and multiple sensor types, saving money on the requirement for one sensor and one transmitter per measurement.


The following are available in the HaloSense range;

  • Online free chlorine 0.005-2ppm, 0.05-5ppm, 0.05-10ppm, 0.05-20ppm, 0.5-200ppm
  • Online total chlorine 0.005-0.5ppm, 0.005-2ppm, 0.05-5ppm, 0.05-10ppm, 0.05-20ppm
  • Online residual chlorine in seawater analysers (free or total bromine) 0.005-2ppm, 0.05-5ppm, 0.05-10ppm, 0.05-20ppm
  • Online zero chlorine (designed to measure the absence of free chlorine) 0.005-2ppm for applications such as post activated carbon and pre-RO monitoring.


  • Continuous online monitoring for residual chlorine in any water
  • Water treatment plant residual chlorine dosing control
  • Secondary chlorination free chlorine dosing control
  • Distribution monitoring
  • Cooling tower monitoring and control
  • Pasteuriser dosing control
  • Seawater chlorination control
  • Bromine monitoring in seawater
  • Food washing
  • Chloramination control

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