Inside the stainless steel stem tube there is a bimetallic helicoid spiral formed by two metals with a different coefficient of expansion, whose lower part is welded to the end of the stem. The upper end is associated with the transmission shaft and the needle. A variation of the temperature causes deformation of the spiral, causing the rotation of the shaft and needle.
Fully stainless steel made.
Available dial cases Ø 63, 80, 100, 125 and 150 mm.
Bottom or back mounting, maximum stem length 1000 mm.
Available ranges up to 500ºC
Not suitable for heavy duty installations.