Patent ID: 6625029
Filing Date: 2003-09-23
Classification: G01L

Abstract:
A sensor for sensing water temperature and water pressure in a water boiler,wherein said sensor arrangement is a combined pressure and temperature sensor unit provided in a single housing, said housing containing a ceramic support element having a water contact side which is freely accessible by water inside an open cavity provided inside said housing, said ceramic support element carrying an electronic circuit comprising separated first and second electronic circuit zones on a dry side sealed from said water contact side by a sealing arranged in said cavity inside said housing, said ceramic support element comprising a temperature sensing NTC-sensor or a SND-chip thermistor connected to said first electronic circuit zone, said ceramic support element being formed with an integrated membrane which is deformable by pressure on said water contact side and which carries on the dry side of the ceramic support element electronic components responding to pressure depending membrane deformations, said electronic components being connected to said second electronic circuit zone, said electronic components and said second electronic circuit zone serve to detect water pressure being constituted by an Application Specific Integrated Circuit (ASIC), and wherein said ceramic support element with said electronic circuit and said respective pressure detecting and temperature sensing electronic components being integrated into a prefabricated electronic chip body.