TEMPERATURE SWITCH

PURPOSE: To provide good thermal responsiveness for the prevention of cracking by providing a clamp of a nonmagnetic material between the bores of a temperature- sensing magnetic material and of permanent magnets and a reed-switch storage body, the clamp having a stopper portion at one end and secured to the storage body at the other. CONSTITUTION: The contact portions of the pair of magnetic-material reed pieces 2a, 2b of a reed switch 2 are sealed inside a glass tube together with an inert gas and the opposite side is exposed to the outside for connection. The switch 2 is secured to a storage body 4 made of resin and is held in position by the packing of a mold- filling resin 8 to provide a watertight structure. A temperaturesensing magnetic material 6 and permanent magnets 5a, 5b are secured to the storage body 4 via a cylindrical clamp 33 passing through the bore side. The clamp 33 is constructed of a nonmagnetic material having a stopper portion 33a in the form of a flange or the like at its lower portion to prevent dropping and a caulking portion 33c at its upper portion which is secured to the storage body 4. Since heat is transferred also from the bore of the magnetic material 6 through the clamp 33, quick response to changes in outside temperature is assured, and, since no adhesive is used the glass tube, etc., is not cracked by thermal expansion of the adhesive.