Sight Glass – Thermaflow Kit

The 9180-K Thermaflow sight glass gauge is an industrial fluid level indicator designed for use in hydraulic or cooling system reservoirs. It combines a clear 5-inch glass window to show fluid level and an integrated thermometer dial or tube to provide temperature reading of the fluid. The unit mounts via a 3/8-16 (or other specified) threaded boss into a reservoir or reservoir tank wall, giving operators a quick visual check on both fluid level and temperature without opening the tank. Its robust construction suits heavy-duty machines, truck/trailer hydraulic systems, or other industrial equipment requiring reliable monitoring. Installation is straightforward: screw into the tank port, ensure proper sealing, then simply observe. Because it monitors both level and temperature, it helps identify potential fluid overheating or low level conditions early, improving maintenance response.
Typical uses include hydraulic reservoir cooling circuits, industrial coolant tanks, and mobile equipment reservoirs.

Before installing, verify the thread size and depth match your reservoir port. The sight glass should face the operator location to be easily viewed. After installation, fill system to required level and check temperature reading during operation to ensure gauge is functioning correctly. Periodically inspect the glass for clarity and the thermometer dial for accuracy — if either is compromised (cloudy glass, stuck dial) replace the unit. For mobile equipment or trucks subject to vibration, ensure the mounting is tight and that sight glass is protected by guard or housing to prevent damage.