Running time meter for central heating, has sensor for detection of operation of central heating and device for display of operating hours whereby sensor includes operation of central handling over microphone or oscillation sensor

摘要

Running time meter has a sensor (1) for detection of operation of central heating and a device for display of operating hours. The sensor includes the operation of the central heating over a microphone or oscillation sensor. The device for the display of the operation hours has an arithmetic unit for conversion of the operating hours into operational costs.