Abstract: Apparatus for monitoring fluid condition in a fluid recovery system for removing water and solid contaminants from a fluid is disclosed. One aspect of the present invention relates to an improved fluid level indicator device for indicating and controlling the fluid level in a vacuum distillation chamber. A second aspect of the invention relates to an improved sight glass used for monitoring the condition of the cleaned fluid. The sight glass is a one-piece unit formed from a homogeneous, substantially transparent material. Both fluid level indicator and sight glass are designed to function individually or in combination in the severe environment and under the diverse operating conditions of the fluid recovery system.

Abstract: A fluid recovery system for removing water and solid contaminants from a fluid such a lubricant oil, coolant, and lubricating oils and the like for manufacturing operations is disclosed. A cylindrical vacuum vessel is provided with a centrally disposed cylindrical heating unit and a heat exchanger coil surrounding the heating unit, within the confines of the vacuum vessel. A water condensation trapping cover seal arrangement is provided for the top of the vessel. A cylindrical filter is disposed in surrounding relationship to the heating unit.