Q45H/62-63 Residual Chlorine Transmitter

ATi’s Q45H/62-63 Residual Chlorine Transmitter is designed for online water quality monitoring and control of chlorination systems.

Features & specifications

  • Free or Combined Chlorine monitoring
  • Loop-powered or battery operation
  • External 5-17 VDC version for solar power applications
  • Reagent free measurement
  • pH compensation for the operation to a pH of 9.5
  • Measurement from 0-200 ppb to 0-200 ppm
  • Constant-head flowcell simplifies operation
  • Large, easy-to-read LCD display
  • Clear, menu-driven user interface
  • NEMA 4X (IP-66) enclosure
  • Wall or pipe mounting bracket standard
  • Built-in PID controller


Continuous water quality monitoring of Residual Chlorine

ATi’s Residual Chlorine Transmitter is designed for on-line monitoring and control of chlorination systems. It is available as a Free Chlorine Monitor for drinking and cooling water systems, and a Combined Chlorine Monitor ideally suited for “chloraminated” drinking water. The Combined Chlorine System can also be used in wastewater effluents where sufficient ammonia is present prior to chlorination to result in a predominantly monochloramine residual.

Unlike on-line colorimetric and most amperometric monitors, Q45H systems utilise a membrane-covered polarographic sensor that does not require the addition of chemical reagents. That means no more costly reagents to purchase or flow cells that require frequent cleaning. All that’s needed is a constant flow of water across the face of the sensor and this is provided by a sample constant-head flowcell. The Q45H system has no moving parts, so there are no pumps or motors that burn out, or tubing breaks that create maintenance nightmares. All normal maintenance items are included with each system. The Q45H Chlorine Monitoring System is easy to operate, requires minimal maintenance, and will not eat a hole in your operating budget with ongoing reagent requirements or component replacement costs.

Submersible sensor

Submersible sensor

Sealed flow cell

sealed flowcell

Constant head flow cell

constant head flowcell

Key benefits

  • Reagent free
  • Free or combined chlorine monitoring
  • No moving parts for reliability and easy maintenance
  • Easy to install


ATi’s Q45H/62-63 Residual Chlorine Transmitter is available for a wide range of applications including:

  • Potable Water Treatment
  • RO Membrane Protection
  • Chloramination Systems
  • Cooling Towers
  • Wastewater Treatment
  • Food Wash Water


Additional information