Temperature sensor element and temperature sensor

Abstract

An object is to provide a temperature sensor element that can suppress a reduction reaction of a heat sensitive body, even after a long time usage in a strong reducing atmosphere. A temperature sensor element 1 includes: a heat sensitive body 11 of which electric resistance changes according to a temperature; a first coating layer 20 that covers a periphery of the heat sensitive body 11; a pair of lead-out wires 15 and 15 that are connected to the heat sensitive body 11, and also are led out in penetration through the first coating layer 20, toward a rear end side; a second coating layer 25 that covers a periphery of the pair of lead-out wires 15 and 15 which are led out in penetration through the first coating layer 20; and a third coating layer 30 that covers peripheries of the first coating layer 20 and the second coating layer 25. The second coating layer 25 is formed of a mixture of glass and at least one of chromium oxide, manganese oxide, ruthenium oxide powder, iridium oxide powder and platinum oxide.

Dependencies are inferred from the claim text.