The Shell Water Detector capsule is the standard industry test for monitoring the level of free or dispersed water in Jet Fuel. Capsules will only work on jet fuels. They will not work reliably with lighter (Avgas) or heavier (diesel) fuels.
Slight variations in manufacturing and the fact that the chemicals used are sensitive in their response to different sizes of water droplets prevents this tester from being useful to determine exact water levels. This test should be used as a go/no go method. Results should be either negative (no color response), positive (noticeable green color) or trace (slight color).
The capsules are not accurate if less than 5 ml. of fuel is drawn into the syringe.
Part Number Description:
Shell ® Water Detector capsules – Box of 80 capsules, (10 tubes of 8 capsules per tube)