Abstract: A controller for a water heater which has a power source configured to power up the components of the controller, wherein the power source is independent of a battery or mains electricity and uses a thermoelectric effect; and a gas sensor powered from the controller via the power source, wherein the gas sensor is configured to be positioned externally to the controller and connected to the controller, and wherein the controller is configured to trigger an alarm if a concentration of gas in the vicinity of the gas sensor is above a predetermined threshold.

Abstract: A heating system including a gas burner configured to burn gas to produce heat. The gas burner includes a gas inlet and a gas burner controller. A gas valve is arranged to regulate the flow of gas to the gas inlet of the gas burner. The system includes power lines. The gas valve is connected to the gas burner controller via one or more of the power lines. A gas valve control unit is operatively connected to the gas valve. The gas valve control unit includes stored parameter data of the gas valve. The gas burner controller transmits an enquiry signal to the gas valve control unit. The gas valve control unit is operative to transmit the parameter data to the gas burner controller in response to receipt of the enquiry signal. The enquiry signal and the parameter data are transmitted via the one or more power lines.

Abstract: Method for pressure monitoring a pressure-dependent process comprising the following steps: Measuring over time a pressure of the pressure-dependent process. Processing the measured pressure by determining if the measured pressure (10, 20) or a filtered pressure obtained from the measured pressure is inside or outside defined pressure ranges (11, 12, 13, 14), each pressure range being defined by a respective lower limit (A, C, E, G) and by a respective upper limit (B, D, F, H).

Abstract: There is provided a pressure sensing device comprising a first elongated hollow member comprising a first opening located at a first end of the first elongated hollow member: a second opening located at a second end opposite to the first end of the elongated hollow member: a third opening located at between the first and the second end of the first elongated hollow member. The pressure sensing device further comprises a second elongated hollow member, the second elongated hollow member being connected to the first elongated hollow member via the third opening, wherein the first opening being configured to connect the inside of the second elongated member to the inside of a third hollow member: one of the free end of the second elongated member or third opening configured to open out to external atmospheric pressure through an aperture: and a pressure sensing element being connected to the other one of the free end of the second elongated member or the third opening.