PRODUCT SHEET ACCURATE AND STABLE METHANE SENSOR FOR LONG-TERM DEPLOYMENT Tunable Diode Laser Detectors are accurate with excellent methane molecule selectivity The CONTROS HydroC™ CH4 sensor is a unique subsea methane sensor for in-situ and online measurements of CH4 partial pressure (pCH4). This versatile sensor is the ideal solution for the monitoring of background CH4 concentrations, as well as for detecting high peaks of CH4 in the deep sea environment. OPERATING PRINCIPLE Dissolved CH4 molecules diffuse through the custom-made thin film TOUGH membrane into the internal gas circuit. This leads to a detection chamber where CH4 concentration is determined by means of Tunable Diode Laser Absorption Spectroscopy (TDLAS). Concentration dependent laser light intensities and additional gas circuit data are converted into an actionable, reliable output signal. HIGH ACCURACY AND STABILITY Due to their narrow line-width, Tunable Diode Laser Detectors are accurate with excellent methane molecule selectivity. Further, they feature a large dynamic range covering background partial pressures up to 40 matm. All detectors are subject to individual calibration and an in depth quality check in the -4H-JENA QA lab before they are integrated into our sensors. The quality of the calibration is then verified individually in calibration tanks. The sensor is stable over extended periods as the detector tunes the laser to CH4 absorbing and non-absorbing wavelengths for each measurement, thus compensating for potential drift influences. ACCESSORIES A wide range of available accessories ensures that each of the CONTROS HydroC™ CH4 sensors can be adapted to meet customers requirements. Underwater pumps and different flow head designs are the most common options and can be delivered quickly. An anti-fouling head is available for conditions with significant bio-fouling challenges and an internal data logger can be specified in conjunction with the sensor’s flexible power management features and the CONTROS HydroB® battery packs for long-term, unattended deployments. SOFTWARE CONTROS DETECT® includes realtime data visualization, setting of sensor parameters, download of data from internal data logger and sleep mode function. indows 7 32 Bit or higher W 200 MB free disk space Dual Core CPU with 2GB RAM Available temperature ranges for reduced power consumption: – -2°C to +30°C – -2°C to +20°C – -2°C to +8°C Analogue output: 0 V - 5 V RS-485 data interface Internal data logger External battery packs ROV and AUV installation packages Profiling and mooring frames External pump (SBE-5T or SBE-5M) Flow through version fo

PRODUCT SHEET CONTROS HydroC™ CH4 APPLICATIONS The CONTROS HydroC™ CH4 is trusted to deliver precise readings for diverse applications, including: ● Climate studies Fresh water control Methane hydrate studies Offshore leak detection New robust TOUGH membrane Improved gas cycle management for reliable long-term deployments Deep sea capability, water depths up to 6000 meters High accuracy and low detection limit of background concentration Large measuring range Optimal long-term stability Ideal methane selectivity User-friendly 'Plug & Play' principle; all cables, connectors and software included...