soil methane (CH4) sensor

Soil CH4 SensorThe PSI Mini-Pro CH4 Sensor is ideal for measuring soil methane partial pressure. The sensor is designed for long-term monitoring in any soil environment. It is easily supported by any data logging platform and has a low power consumption.

The PSI Mini-Pro CH4 Sensor can be combined with the EOSense range of soil CO2 concentration or flux sensors for complete environmental monitoring and budget analysis of greenhouse gases (GHG).

Our range of sensors are ideal for scientific research or for consultants and environmental management.


related products



  • Soil Biogeochemistry Research
  • Landfill and Groundwater Methane Monitoring
  • Coal Seam Gas and Fracking Monitoring
  • Greenhouse Gases (GHG) and Climate Change Research



  • Standard measurement ranges (pCH4 concentration): 0-1% (~0-300μg/L, by mass); 0-10% (~0-3 mg/L); or 0-100% (~0-30 mg/L)
  • Resolution: 0.01% or 0.1% for 0-100% measurement range
  • TDGP: 0-3 bar
  • Accuracy: pCH4: + 2% of maximum range; TDGP: + 1%
  • Equilibration time (t63): 6 minutes
  • Operating temperature: -2 to 50˚C
  • Input voltage: 6-12 V DC
  • Power consumption: 100 mA; 120 mA during warmup
  • Data output: Choose between Digital RS-232, Analog 0-5 V or 4-20 mA
  • Data Storage: 2GB (with datalogging option)
  • Sample rate: 1 second (user selectable with datalogger / controller)
  • Length: 28 cm (add 9 cm for internal battery pack)
  • Diameter: 5 cm
  • Weight: 1 kg in air, 0.25 kg in water
  • Housing: Delrin® (waterproof to 300 meters)
  • Membrane Protection: NITEX screen
  • Warranty: 1 year