As mentioned in J.I.G and approved for use by IATA (JIG 11, 2012)
This is very similar in appearance to the Shell Water Detector and uses a syringe and capsule. A 5ml sample is sucked through the detector head into the syringe. An initial indication occurs at about 10ppm when the capsule turns from a pale yellow to a pale green colour. The colour deepens to a dark green-blue, indicating a water content of 30ppm.