Sensor connection means

The invention relates to a sensor adapted for electrical connection to a power source having an electrical contact means ( 3 ). The sensor has a first insulating substrate ( 1 ) carrying a first electrode ( 2 ) and a second insulating substrate ( 7 ) carrying a second electrode ( 6 ). The electrodes are disposed to face each other in spaced apart relationship, sandwiching a spacer ( 4 ) therebetween. A first cut-out portion extends through the first insulating substrate ( 1 ) and a spacer ( 4 ) to expose a first contact area ( 23 ) on the second insulating substrate ( 7 ). This permits the electrical contact means ( 31 ) to effect electrical connection with the first contact ( 23 ) which in turn is in electrically conductive connection with the second electrode ( 6 ). A similar contact arrangement may be disposed on the opposite side of the sensor.