Q45/85 Peracetic Acid Transmitter

ATi’s Q45/85 Peracetic Acid Transmitter is an on-line water quality monitor capable of providing real time measurement of low levels of PAA in solution.

Features & specification

  • Low maintenance membraned sensor
  • Loop-powered or battery-operated
  • External 5-17 VDC version for solar power applications
  • Interference-free measurement
  • Measurement from 0-20 ppm to 0-2000 ppm or mg/l
  • 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


PAA disinfection monitoring you can rely on

Peracetic Acid (PAA) is an extremely strong oxidizer that is widely used in the food industry for disinfection of piping systems and processing equipment. It is also used for spray washing of food products and for disinfection of cooling water systems. As a disinfecting agent, PAA is often preferred because it produces no harmful breakdown products. As with any disinfection system, maintaining proper residual values is the key to effective pathogen control. To facilitate reliable chemical feed control, ATI has developed an on-line water quality monitor capable of providing real-time measurement of low levels of PAA in solution.

The Q45H/85 Peracetic Acid Transmitter uses a direct sensing polarographic probe mounted in a flow cell to measure PAA residuals in a flowing water stream. A permeable diffusion membrane isolates the sensing electrodes from the measured sample, providing long-term stability without electrode fouling problems. The measurement is selective for PAA and is not affected by changes in hydrogen peroxide in the solution.

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

Key benefits

  • Real-time measurement of low levels of PAA in solution
  • Long-term stability without electrode fouling problems
  • PAA specific measurements


The Q45/85 Peracetic Acid Monitor is available for a wide range of applications including:

  • Egg Washing Systems
  • Wastewater Treatment
  • Ground Water Decontamination
  • Bleaching Systems
  • Oil & Gas Recovery Systems
  • Cooling Towers Cleaning


Additional information