variable depth style temperature sensors have the sensor in the tip. The element of a variable depth sensor is protected by a flexible stainless steel hose. These temperature sensors are equipped with a single pin bayonet style lock cap that swivels up and down directly on the armor hose. The cap locks onto the pin of the adapter screwed into the equipment needing temperature sensing. A solid pin male plug is supplied for instrumentation hookup. J type 20 guage sensor with standard limits of error.