There are two main types of Pt100 element: wire wound and thin-film.
» Wire Wound Pt100 Elements
Wire wound elements consist of a length of fine Platinum wire coiled around a ceramic or glass core. These types of Pt100 element are typically 1 to 5mm diameter and 10 to 50mm in length. The ceramic or glass core can make them fragile and susceptible to vibration so they are normally protected inside a probe sheath for practical use.
» Thin Film Pt100 Elements
Thin film Pt100 elements are manufactured using materials and processes similar to those employed in the manufacture of integrated circuits. A platinum film is deposited onto a ceramic substrate which is then encapsulated. This method allows for the production of small, fast response, accurate sensors.