The ingress of water into fluid power or lubrication systems reduces the life of oil significantly and causes damage to other components. The most reliable method of detecting water in oil is to measure the interface level between water and oil when the water is separated. The Buehler water alarm units have a float which rises in water but sinks in oil. It only takes a build up of around 90 ml of water in the sight glass to elevate the float and actuate an alarm. An optional assembly kit is available. Water alarm units for in tank installation are available on request.