The RTD‑805/C has its element mounted in open‑ended stainless steel housing. The encapsulated sensor design on the RTD‑830/C provides low cost with a fast response and is designed for mounting on flat surfaces. Stainless steel housing with 1/4" hex head and a #8‑32 NC‑2A threaded body encapsulates the element on the RTD‑850/C. This unit is designed for applications requiring vibration and shock resistance. The RTD‑860/C has a closed‑end stainless steel tube with the sensor mounted in the tip, the mounting plate includes two holes for easy installation.