CH₄ FT - METHANE SENSOR - ACCURATE LONG-TERM

The CONTROS HydroC CH₄ FT is a unique surface methane partial pressure sensor designed for flow through applications like pumped stationary systems (e.g. monitoring stations) or ship based underway systems (e.g. FerryBox). Fields of application include: Climate studies, methane hydrate studies, limnology, fresh water control, aquaculture / fish farming.

All sensors are individually calibrated using a water tank, which simulates the expected water temperatures and gas partial pressures. A proven reference system is used to verify the CH₄ partial pressures in the calibration tank. This process ensures that the CONTROS HydroC CH₄ sensors achieves excellent short and long term accuracy.

OPERATING PRINCIPLE
Water is pumped through the flow head of the CONTROS HydroC CH₄ FT sensor. Dissolved gases diffuse through a custom made thin film composite membrane into the internal gas circuit leading to a detector chamber, where the CH₄ concentration is determined by means of Tunable Diode Laser Absorption Spectroscopy (TDLAS). Concentration dependent laser light intensities are converted into the output signal taking additional sensors within the gas circuit into account.

HydroC CH4 FT data sheet

FEATURES

  • High accuracy and low detection limit of background concentration
  • Large measuring range
  • Optimal long-term stability
  • Ideal methane selectivity
  • Non-consuming CH₄ measurement
  • Very robust
  • User-friendly ‘Plug & Play’ principle; all required cables, connectors and software are included

OPTIONS

  • Data logger
  • Easy integration into FerryBox applications
  • Analogue output: 0 V – 5 V

  REFERENCES

SEDIMENT TRAPPING BY DAMS CREATES METHANE EMISSION HOT SPOTS
Applying continuous measurements of the CONTROS HydroC CH₄ reveals that dammed fresh water reservoir emission rates far exceed previous estimates for temperate reservoirs or rivers.

ENVIRONMENTAL SCIENCE & TECHNOLOGY,
DOI 10.1021/ES4003907

METHANE EMISSIONS DRIVEN BY HYDRODYNAMICS AND TEMPERATURE
“This work illustrates that small rivers can emit significant methane and highlights the need for further studies on the link between hydrodynamics and connected wetlands.”

ENVIRONMENTAL SCIENCE & TECHNOLOGY,
DOI 10.1021/ACS.EST.6B03268

METHANE RELEASE RATES FROM ICE SHEETS DETECTED USING THE CONTROS HYDROC CH4
The Greenland Ice Sheet emits tons of methane according to a new study, showing that subglacial biological activity impacts the atmosphere far more than previously thought.

 

NATURE, DOI 10.1038/S41586-018-0800-0