Thin-film RTD elements are made by depositing a very thin layer of metal (usually platinum) onto a ceramic substrate material. The metal film is laser cut or etched into an electrical circuit pattern that provides the specified amount of resistance. Lead wires are then attached, and a thin protective glass coating is applied to the entire element.

The thin-film RTD elements are made by depositing a very thin layer of metal (usually platinum) onto a ceramic substrate material. The metal film is cut by the laser or etched into an electrical circuit pattern which provides it the specified amount of resistance.

A platinum resistance temperature detector (RTD) is a device with a typical resistance of 100 Ω at 0 °C. It consists of a thin film of platinum on a plastic film. Its resistance varies with temperature and it can typically measure temperatures up to 850 °C. Passing current through an RTD generates a voltage across the RTD.

Thin film RTD Thin film RTD element is made by depositing a thin layer of the temperature sensitive material such as nickel, platinum & copper on the insulating substrate. The material is carved into a pattern to meet the required temperature. The terminals are then attached to the element & a protective sheath covers the element to protect it.