Q45/84 Hydrogen Peroxide Transmitter

ATi’s Q45/84 Hydrogen Peroxide Transmitter provides online, real-time measurement of low levels of dissolved H2O2 in solution.

Continuous Water Quality Monitoring of H2O2

ATi’s Q45/84 Hydrogen Peroxide Water Quality Transmitter is designed to continuously measure the concentration of H2O2 in aqueous systems. Using a direct sensing polarographic probe, this monitor is mounted in a flowcell to measure H2O2 in a flowing water stream. A Peroxide permeable diffusion membrane isolates the sensing electrodes from the measured sample, providing long-term stability without electrode fouling problems. The measurement is selective for Peroxide and does not respond to most other chemicals in solution.

Please Note: This transmitter does not include a Battery-Operated version. For Portable Monitoring please view our PQ45 Portable Monitor & Data-Logger System.

Features & specification

  • Low maintenance membraned sensor
  • Loop-powered or battery-operated
  • External 5-17 VDC version for solar power applications
  • Interference-free measurement
  • Constant-head flowcell simplifies operation
  • Sealed flowcell option for recirculation systems
  • 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


The Q45/84 Hydrogen Peroxide Monitor is available for a wide range of applications including:

  • Food Wash Water
  • Iron Oxidation Systems
  • Free Chlorine Removal
  • Bleaching Systems
  • Cooling Towers
  • Potable Water Treatment
  • Odour Scrubbers

Key benefits

  • Multiple flowcell options
  • Measurement from 0-2 ppm to 0-200 ppm or mg/L
  • For simple installation, complete flow control assemblies are available



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