PM400 Multi Zone Phosphine Fumigation Monitor

Continuously Monitor Multiple Phosphine Concentration Fumigation Points With The PM400 Fumigation Monitor From Spectros Instruments. 

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  • Overview
  • Features
  • Specifications
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Continuously monitor multiple fumigation points using advanced infrared technology and the latest in network communication protocols.

The Spectros Instruments’ PM-400 rugged modular design delivers unmatched performance for critical Phosphine Fumigations. The user may monitor multiple locations on-site or remotely via a secure enscripted web portal.

Phosphine Concentration Values for each zone may be viewed in real time and:

  • stored onboard, printed later
  • transmitted to the internet and viewed on a secured server or smartphone
  • downloaded to a personal computer
  • used to indicate alarm/action levels

The PM400 Multi Zone PH3 Fumigation Monitor is available for sales at all Air-Met offices. 

The PM400 Multi Zone Fumigation Monitor features:

  • Superior Infrared Technology
  • 0-10,000 ppm (1%) options
  • Multiple Sample Lines
  • Wi-Fi (Cellular, Satellite), Ethernet, PLC Integration
PM400 Specifications
Coverage 4 zones standard (8,12,16 zone options)
Detector NDIR (Non-Dispersive Infrared)
Measuring Range PH3: 0-10,000 ppm options
Size/Weight 22”H x 14”W x 6”D, 16lbs.
Sampling Automatic or manual
Monitoring Distance 500ft./150meters (sample + exhaust)
Operating Temperature 32ºF to 122ºF / 0ºC to 50ºC
AC Power 100 to 240VAC. 50/60Hz, 20W
Altitude Limit 2000m


  • Fumigation phosphine monitoring