This sensor assembly is a very common one used in many process applications. It consists of a Pt100 sensing element housed in a stainless steel protective sheath with a process thread fixed below the termination head which can be Aluminium, Plastic or Stainless Steel. 6mm would be a standard diameter for this probe and some stock lengths are 100mm up to 300mm in increments of 50mm. Other diameters & lengths are also available

Type	PT100
Max Temperature Rating	250C
Tolerance Class	A or B
Configuration	2, 3, 4, Wire
Style	Simplex, Duplex
Termination Head	Aluminium, Plastic, Stainless
Sheath Diameter	6mm
Sheath Length	Specify
Termination Style	Leads, Block, Tx's
Process Thread	Specify
Approvals	IEC 60079-0 : 2011, IEC 60079-11 : 2011, Sira 18ATEX2024X, IECEx

Datasheet