Izitholi zokushisa ezimelana nokumelana (ama-RTD), ezaziwa nangokuthi ama-thermometers okumelana, zizwa kahle amazinga okushisa enqubo ngezinga elihle kakhulu lokuphindaphinda nokushintshashintsha kwezinto.Ngokukhetha izakhi ezifanele kanye ne-sheathing evikelayo, ama-RTD angasebenza ebangeni lokushisa elingu-(-200 kuya ku-600) °C [-328 kuya ku-1112] °F.