Abstract: A telemetry system for reporting the status of a number of physical parameters occurring during operation of industrial equipment, such as the monitoring of refrigeration/air conditioning safety controls and anticipatory refrigeration controls. Activation of the safety or anticipatory controls generate electrical signals to activate a four input alarm transmitter, which automatically dials a pre-programmed telephone number and reports the status of the various inputs to a special monitor receiver at a remote location. An interface board is coupled to the safety and anticipatory controls, and multiplexes the signals therefrom into four transmitter inputs. An indicator panel connected to the interface board provides a maintained visual indication of which input(s) have caused a transmission. The anticipatory controls are set to trip before the safety controls, which latter controls effect shut-down of the system, and provide anticipatory signals warning of impending system problems.