Platinum sensors details multi-sensor platforms

Depending on the intended application and control system used, the platforms can be kept at a constant temperature or subjected to precise temperature cycles.

The heater and temperature sensor circuits are protected by an electrically insulating glass layer.

Sensitive layers can be applied to the non-passivated electrodes by the customer, usually by way of a screen process or drop coating.

Through the application of the appropriate metal oxides, for example, MSPs become gas sensors with which concentrations of oxygen, carbon monoxide, nitrogen or methane can be detected down to the parts-per-million range.

The platforms can also be used as a base for high-accuracy humidity sensors or air-quality sensors.

The MSPs have an operating temperature range of -50C to + 500C and are available in a range of sizes from as small as 3 x 3.2mm.

They are usually supplied with 10mm-long connection leads (two for the heater, two for the temperature sensor and two for the customer-specific electrodes) although leadless versions can be produced if required for customers who prefer to bond directly to the substrate.