CCS - MV Bluefin 2017 V01 Radon

A Durridge model RAD7 radon sensor, coupled to a liquicel membrare contactor equilibrator, was installed in the carbon team’s container and measured seawater from the ship’s auxiliary seawater pump for the duration of the voyage. Survey settings: A flow of 2-3.5 litres per minute of seawater was maintained through the membrane contactor’s shell side and the RAD7’s air pump was used to circulate 300-700 SCCM air through the lumen side of the contactor and the detector. Readings were stored every 10 minutes (each reading is an integration of counts from the preceding 10 minute period). Calibration Information: The instrument was calibrated by the manufacturer in 2017. Survey settings: The instrument was submerged in a bath of continuously flowing seawater with a flow of 2.5 litres per minute into the sensor head. Readings were recorded once per minute Calibration Information: The instrument was calibrated by the manufacturer in 2017.