TEMPERATURE INDICATOR Russian patent published in 1994 - IPC

FIELD: measurement technology. SUBSTANCE: permanent magnet is fastened in first space of body. Coats of diamagnetic and ferromagnetic materials with preset Curie point successively applied all over surface of bod present thermosensitive element. Light guide contacting ribbed surface of heat insulating spacer is passed through second space of body filled up with ferromagnetic fluid. Thermosensitive element contacts the other surface of spacer. In particular case magnetic pickup in the form of hermetically sealed reed relay may be attached to outer surface of body in zone of second space. EFFECT: improved operational characteristics. 3 cl, 1 dwg, 1 tbl