Page 19: of Marine Technology Magazine (March 2013)

Instrumentation: Measurement, Processing & Analysis

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gas well, production facility, or pipeline. Teledyne Marine has recently licensed technology developed by CONTROS GmbH to produce the HydroCO2 and HydroCH4 instruments and allow its customers to better address their bio-geo-chemical as well as oil and gas-related applications. Combining carbon dioxide and/or meth-ane concentration data with the physical oceanographic parameters measured with Teledyne RD Instruments? Acoustic Dop- pler Current Pro lers (ADCPs) and Con- ductivity Temperature and Depth (CTD) sensors will allow improved understand- ing of biogeochemical processes as a function of ocean temperature, salinity, mixing, and advective transport. Inte- gration of the ADCP current pro les and volumetric transport information with the dissolved gas readings from the Hy- droCO2 and HydroCH4 systems will also improve the utility of hydrocarbon leak detection programs by allowing users to backtrack the ?up current? to identify the source of the seep or leak. Facilitating and expanding data collec- tion will be accomplished by integrating the HydroCO2 and HydroCH4 in-situ sensor technologies with other Teledyne Instruments, Inc. product offerings. Ex- amples are the Teledyne Benthos, Tele- dyne Webb Research, and Teledyne Gavia tethered, towed, and autonomous vehicles. The HydroCH4 sensor may be combined with the Teledyne TSS Pipe Detection system via the Mobile Early Leak Detection System (MELDS) for de-tecting the presence of hydrocarbons in water. The HydroCO2 and HydroCH4 products utilize a  at hydrophobic membrane that forms a semi permeable phase boundary between full ocean depth pressures and the interior of the instrument. Dissolved gasses in the water pass into an equili- brated internal headspace in the form of a gas stream. Concentration of CO2 or CH4 in the gas stream is quanti ed us- ing an industry standard non-dispersive MTR #2 (18-33).indd 19MTR #2 (18-33).indd 193/5/2013 4:01:18 PM3/5/2013 4:01:18 PM

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