... . The bimetal system is built in the stem of the thermometer and functions as a temperature sensor.Compare to the glass ... thermometer, it has advantages as non-Hg, clear in reading, durable. ... ,<30s; D=8mm, <40s5. PN:6.4Mpa6. Stem: 1Cr18Ni9Ti Bimetallic thermometer,digital thermometer,dial thermometer