| 摘要 |
<p>The present invention provides a sensor unit (10) connectable in a water pipeline of a water system comprising a domestic water heater. The sensor unit comprises a housing (11, 12), a pressure sensor (13) located in the housing (11, 12) and operable to provide an electrical signal indicative of water pressure, and a temperature sensor (14) located in the housing (11, 12) and operable to provide an electrical signal indicative of water temperature. The housing (11, 12) has a communication aperture (17) in a surface thereof which allows communication of water pressure to the pressure sensor (13) located in the housing (11, 12). The housing (11, 12) has an arm (16) which when the sensor unit (10) is connected in the water pipeline extends towards the centre of the water flow and which has located therein at least a part of the temperature sensor (14).</p> |
