Temperature measuring device for enamelled apparatus

Claim 1

A temperature measuring device for large scale container apparatus protected by a vitreous enamel coating subject to high thermo-mechanical stresses, comprising: a support surface constituted by the surface of a probe extending through a major part of said container apparatus and supported on the wall of said apparatus only at one end of said probe, said probe having an enamel covering; two pair of conductor connection means for connections to measuring equipment external to said apparatus, said connection means being located adjacent to the end of said support surface supported on said wall of said apparatus; a measuring resistance conductor loop embedded in said enamel covering comprising two conductors that for almost all of their length are straight and parallel to each other and which are bridged across by a third conductor at a location such as to provide an electrical resistance of said loop, as embedded in said enamel covering, of a precise predetermined value convenient for thermometric evaluation, and two parallel pairs of lead conductors likewise embedded in said enamel covering, each pair connecting one end of said measuring loop to a pair of said connecting means, both said resistance measuring conductor loop and said lead conductors being of flattened cross-section oriented parallel to said support surface.