Methane is one of the most important gases in our environment. Detecting sites of active methane seepage from the sediment and quantifying gas fluxes in the water column requires accurate online measurements in-situ.

CONTROS’ HydroC™ CH₄ is a unique underwater methane sensor solving the global problems of the in-situ and online measurements of CH₄, profiling on rosettes or long-term deployed on buoys and moorings. Applications include climate change studies, methane hydrate studies, detection and localization of natural methane seepage, etc.

Weight:	3,4 kg (0,2 kg in fresh water @ 20°C; S = 0)
Power:	300mA @ 12V (without external pump)
Data Output:	RS-232 or RS-485
	Analog option available
Operational Depth:	2000 - 4000 - 6000m
Response Time (T63):	< 100 sec. (with external pump)
Housing:	90 mm ø x 376 mm plastic housing
Connector:	Subconn® MCBH8MTI (8-pin male)
Antifouling:	CONTROS ProtectionCap
Detection Range:	100 nmol/l - 75 µmol/l (other ranges available)
Resolution:	10 nmol
Temperature Range:	+3° C - +30°C Arctic version: -2° C - +15°C
Software:	CONTROS DETECT Software

Function principle

Dissolved methane diffuses quickly from the liquid through a patented thinfilm composite membrane into the internal gas circuit. Here the CH₄ concentration is measured with high accuracy by non-dispersive infrared spectrometry (NDIR).

Advantages

• The advantages of the CONTROS HydroC™ sensor line is the stability in long term monitoring (12 months+)
• Track proven record in the oil & gas field as well as in the scientific research
• Unaffected performance from turbidity and zero interferences to other gaseous substances in the environment (lowers false alarm rate)
• Easy integration to the required system, integration pigtail is included
• Long-term stable signal, high realiability, very high accuracy and a long maintenance interval
• High realiability and reproducibility of the data
• Plug n' Play principle, all required cables, connectors and software are included and a proven ROV and AUV compatibility