Ready-To-Install (RTI) temperature transmitter assemblies for surface measurements mount directly to tanks, pipes, motors, compressors, reactors or anywhere a surface temperature measurement is needed. These assemblies, classified as RTI-3 temperature assemblies, include the Worm Flexible Sensor coupled with the PC-Programmable or Smart HART temperature transmitters. The Worm spring-loaded flexible sensor trims-to-length and slides through the connection head port and into the assembly.