Phosphine Gas

PM400 Series

Phosphine Monitors

Image of a fumigation monitor

Multi-Zone Fumigation Monitoring

The modular design of the PM400 delivers unmatched phosphine fumigation performance. With two configurations, the monitor can be permanently fixed in one location or transported from one job to another. The device features an intuitive interface to set up and monitor fumigations. Data is automatically archived on the device to prevent loss in the event of power loss. It is securely transfered to the online portal for remote analysis.

Online Monitor Portal

A diversified sensor platform for fumigation that allows users to track gas concentrations, temperature, relative humidity and more from any remote location. Our monitors continuously transmit accumulated data securely, via Amazon Web Services (AWS), using 256-bit SSL encryption to prevent security risk to your firewall configuration.

The portal visualizes:

  • Real-time concentration readings from multiple sampling points
  • Graphing of concentration over time for all points
  • Details about each sensor
  • Job specifics: location, time zone, fumigant, commodity, environment and scheduling
  • Status conditions and alerts

This actionable intelligence transforms raw data into informed decision making.

Screen image of an online portal showing a gas fumigation graph

Product Specifications

Product Type
Phospine (PH3)
4 zones standard (8,12,16 zone options)
Measuring Range
0-10,000ppm (1%) Options
Monitoring Distance
500ft/150m (sample + exhaust)
Detector Type
+/- 1% (50-3,000ppm) +/- 3% (full scale)
Front Panel
3 indicator lights
Data Logging & Web Portal Upload
  • Advanced microprocessor command and conrol
  • Data Storage with continuous data transfer to Spectros Instruments Web Portal and archival option of 1 million record storage
Color touchscreen web interface; Monochrome LCD monitor
Sampling Frequency
User selectable for automatic on/off collection of data and storage onboard and/or on secured web portal
Response Time/Flow Rate
Dependent on gas-sample line length; 0.25" OD x 0.17" ID tubing
Power Safety Mode
Fully automatic system reset; all programmed parameters retained
AC Power
100 - 240 VAC;50/60Hz mains (standard) also battery/solar panel(optional)
Power Consumption
20 Watts
System Noise
Less than 40dB(A) at 10 feet
Operating Temp
32ā„ƒ - 122ā„ƒF (0 - 50ā„ƒC)
Ambient Humidity
5% to 90% RH (non-condensing)
Temperature Drift
±0.3% of reading per Cā„ƒ
Altitude Limit
6,562 ft. (2,000m)
22"H x 14"W x 6"D / 16 lbs.
1 Year from date of shipment. All non-wetted parts.
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