Mini CH4

  • Methane sensor for monitoring methane
    and other alkane levels
  • Used for detecting and following oil spills,
    studying anoxic conditions, determining
    effects of fracking, assessing landfill
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The Mini CH4™ is a compact, low-cost, lightweight, plug-n-play methane sensor designed to provide pCH4 measurements for applications involving immersion in water, oil, or water and oil mixtures.

The Mini CH4™ sensor is designed for monitoring underwater pipelines and storage facilities, and is small enough for mounting on ROV’s for underwater inspections. The Mini CH4™ probe comes in a rugged package that is ideal for studies of methane gas seeps, melting hydrates, and oil spill dispersion.

The sensor combines an oil-resistant gas transfer interface (patent pending) with an infrared detector that is linear in response to methane, but also sensitive to other alkanes.


  • Lightweight
  • Compact size
  • Low power
  • Unique antifouling protection

Physical Dimensions

  • Length: 28 cm (add 9 cm for internal battery pack)
  • Diameter: 5.1 cm
  • Weight: 0.5 kg in air, 0 kg in water
  • Housing: Acetal (depth rated to 600 meters), Titanium (depth rated to 6000 meters)

All of our instruments are covered by a ONE-YEAR LIMITED WARRANTY

Download Data Sheet



Standard measurement ranges:

pCH4 concentration
(~0-300μg/L, by mass)
(~0-3 mg/L)
(~0-30 mg/L)

0.1% of range

TDGP: 0-2 bar

pCH4: ± 2% of maximum range
TDGP: ± 1%

Equilibration time (t63): 6 minutes

Operating temperature: -2 to 50˚C

Electrical Characteristics

Input voltage:

  • 5-30 VDC (12-24 VDC for analog output)

Power consumption:

  • 0.4W (0.6 W for analog output)

Data output:

  • 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)