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Photoacoustic IR Gas Monitor – PA4000

Photoacoustic IR Gas Monitor
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Photoacoustic IR Gas Monitor – PA4000

Photoacoustic IR Gas Monitor – General Monitors PA4000

The stable, durable PA4000 Photoacoustic IR Gas Monitor is purpose-built and detects minute amounts of a wide variety of gases.

Three different enclosure styles ensure there is a configuration for wildly different situations. The instrument typically draws the gas sample via an internal pump, which allows the unit to be mounted in a convenient location if the area to be monitored is inaccessible. The unit can be expanded to monitor up to 8 locations, while an easy-to-read display shows gas concentrations and 3 levels of alarms.


  • Photoacoustic infrared (IR) technology allows gas detection in applications where contaminants or interferants preclude use of other techniques
  • Concentration range from %v/v, ppm, to ppb depending on gas make it suitable for monitoring gases in several applications
  • Easy to install, operate, and maintain for low cost of ownership
  • Operates over a wide temperature range for applications in numerous environments and configurations
  • Easy-to-read display showing gas concentration(s) and alarms provide ease of operation


  • Agriculture
  • Chemical
  • Construction
  • Electric utility
  • Hazardous materials
  • Indoor air quality
  • Medical
  • Mining
  • Oil and gas
  • Pulp and paper
  • Spray painting
  • Water and wastewater
  • Welding