Thermowell - SS 316, F-1/2" X M-3/4" We offer a range of stainless steel welded construction thermowells for use with our range of 6mm diameter Thermocouple or Pt100 sensors. They are ideal for applications where the removal of the sensor could prove complicated such as on a vessel, pipe or tank. They are 12.7mm O.D. and are available with a ½ inch BSP taper process entry thread and ¼ inch BSP parallel sensor entry thread. A wide choice of immersion depths (under the thread) is available to suit various lengths of temperature sensor. Use a ¼ in BSP stainless steel fitting to attach the sensor to the thermowell. Available in a wide choice of lengths to suit various temperature sensors Male Thread: 1/2 inch BSPT Female Thread: 1/4 inch BSPP Sheath material: 316 Stainless Steel Operating range: -75°C to 800°C.