Bayonet Thermocouples are prefered to use in basic process. They are produced as stationary armed and assembled onto system with a compressed spring. Sensor cable is fitted on metal pipe mouth which works as a probe, it doesnt have leakage approve because of fitted to metal pipes mouth. Because of that, they can not be used in humidity ambient nor in liquid applications. Generally, they are used by fitting a metal blocks hole or by touching a metal surface. Standard type is M12 x 1,5 threaded.