Patent ID: 8779785

Claim:
A water content detection sensor comprising: a circuit member in which low resistance conductors disposed in parallel to each other and a high resistance conductor connecting end portions of the respective low resistance conductors; a carrier body having a water-proof property and an insulating property; and a coating body having a water-proof property and an insulating property, the circuit member being disposed between the carrier body and the coating body, wherein a plurality of exposure holes are formed to the carrier body or the coating body so as to expose the low resistance conductors at plural portions, and when water content adheres between the exposure holes and the low resistance conductors are then short-circuited in a current conduction state, a current value is made larger than that before the water content adheres, and the coating body and the carrier body to which the exposure holes are formed as part of a lamination member composed of printing ink layers with at least one layer of the lamination member being formed of urine resist ink and at least one layer of the lamination member disposed between the urine resist ink layer and the low and high resistance conductors being formed of a solvent resist ink.