System and Method for Optically Detecting Low Liquid Level Condition

摘要: A system and method for remotely determining a liquid level condition within tank includes gauge connectable to the tank, dial assembly associated with an optical transceiver reflectivity of assembly. The reflective layer, blocking layer positioned over at least portion disk that is magnetically coupled gauge. One layers rotation therewith. projecting radiant energy toward detecting presence or absence reflected generating signal indicative low when substantial covered by failure occurs in thereby provide fail-safe mode operation.