ChemDAQ® Peracetic Acid Monitoring System

SKU: chemdaq-PAA

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The ChemDAQ® Steri-Trac® system is the only fixed gas monitoring system for detecting airbourne Peracetic Acid

Product Description


The ChemDAQ® Steri-Trac® gas monitoring and alarm system provides the optimal solution for workplace safety, utilising low & high level alarms and a module design for continuous detection.

The Steri-Trac® sensors communicate with the DAQ (Data Acquisition) module where the real time readings are calculated and reported into short and long term exposure limits.

Peracetic Acid Monitoring & Alarms

Peracetic acid (PAA) is a liquid sterilant that is used to sterilise environments in healthcare and food & beverage processing plants.

To provide protection against workers, a1-cbiss supply the continuous gas monitoring system manufactured by ChemDAQ®.

Over exposure to PAA can cause severe physiological effects including:

  • Irritation and burning of the skin and eyes leading to eye damage
  • Irritation of the nose and throat
  • Irritation of the lungs causing coughing and shortness of breath

The Steri-Trac gas sensors display an intuitive scale of LED's to present gas concentrations. The sensors also feature clear audible and visual alerts.

Reliable Means of Employee Protection

Each Steri-Trac area detector can power up to three remote display repeaters providing workers with an indication that a room is safe prior to entry.

Low and high alarms can be set to warn workers to the levels of dangerous gases.

Relay outputs provide simple alarms or more sophisticated controlled fan/airflow systems.

The ChemDAQ® Steri-Trac® is also configurable to support 28 different gases including Ethylene Oxide, Hydrogen Peroxide and Ozone.

Reduce Downtime with Sensor Exchange Program (SXP)

The use of ChemDAQ®'s sensor exchange program utilises exchangeable EnviroCell™ sensor modules for reliable and accurate gas readings. The program provides factory calibrated sensors at regular intervals, to avoid sensor drift and eliminates the need for calibration.

How can you measure Peracetic Acid separately from Hydrogen peroxide, Isn’t there hydrogen peroxide in PAA?

Peracetic acid (PAA) is formed in an equilibrium mixture with hydrogen peroxide and acetic acid, so in a mixture of PAA, hydrogen peroxide and acetic acid, PAA is being continually formed by the reaction of hydrogen peroxide and acetic acid, and peracetic acid is continually breaking down to reform hydrogen peroxide and acetic acid.

CH3CO2H  +  H2O2  => CH3COOOH  +  H2O

CH3COOOH  +  H2O =>CH3CO2H  +  H2O2

The kinetics of this reaction are quite slow, so absent a catalyst, the reaction takes days or weeks, which for most gas detection applications, means that the mixture behaves as a simple solution of the three components, i.e. the PAA does not turn into hydrogen peroxide in the timescale of gas detection. The solution thus contains both PAA and hydrogen peroxide, and both will contribute to the vapour, but PAA is the more hazardous component. The PAA sensor thus needs to detect PAA selectively and not respond to hydrogen peroxide.

PAA and hydrogen peroxide are both strong oxidizing agents and so the bare sensor will respond to both of them, however, ChemDAQ sensors have a chemical filter in front of the sensor which removes at least 99% of the hydrogen peroxide vapour. Thus ChemDAQ’s PAA sensors do indeed respond just to the PAA and not the hydrogen peroxide.

How can a1-cbiss help you?

a1-cbiss known for their engineering capabilities offer a site survey to help specify your requirements, complete project management, installation & commissioning, and ongoing servicing of the system


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