Q46H/65 Chlorine Dioxide Monitor

ATi’s Q46H/65 Chlorine Dioxide Monitor provides an economical and reliable measurement system for water quality monitoring and controlling ClO2 treatment systems.

Continuous water quality monitoring of Chlorine Dioxide

Q46H/65 monitors use a polarographic membrane sensor to accurately measure ClO2 in water. The sensor operates much like a battery, generating a current that is linearly proportional to the concentration of chlorine dioxide in the solution. A ClO2 permeable membrane isolates the sensor from the measured sample and ensures that the measurement is interference-free.

Two versions of the sensor are available, a sensor intended for installation in a flow cell and a sensor intended for submersion applications. Requiring minimal maintenance, sensors are easy to use and easy to maintain. An integral RTD provides temperature compensation and allows the temperature to be displayed and transmitted from the monitor.


Features & specification

  • pH Input Option
  • Programmable range options from 0-200 PPB
    up to 0-200 PPM provides maximum application flexibility
  • AC or DC Power Options
  • Analog Output Options
  • PID Output
  • Digital Communications. Available for either Profibus-DP,
    Modbus-RTU, or Ethernet-IP
  • Relay Contacts
  • Flexible Mounting
  • A backlit large LCD display provides clear visibility in any lighting conditions. A scrolling second line on the display provides additional information and programming prompts.

Key benefits

  • Online monitoring and control for Chlorine Dioxide disinfection systems
  • Adaptable to any Chlorine Dioxide application
  • Interference-free Chlorine Dioxide measurement


  • Food washing
  • Pulp and paper mill
  • Cooling water
  • Potable water treatment


Additional information