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Chiral Photonics has announced the latest addition to its Helica products – a robust fibre-optic temperature sensor for demanding applications that require stability to 1,000C.

The sensor was designed for applications ranging from weld monitoring and control to turbine engine service and design.

The sensing element is a monolithic glass fibre and is as stable as the silica glass.

It is not reliant on any moving parts or coatings and the sensor packaging can be tailored to suit the application needs.

The Helica temperature sensor is based on Chiral Photonics’ chiral grating, which is fabricated by twisting, or microforming, the fibre as it is passed through a miniature heat zone to produce a distinct dip in the transmission spectrum.

The spectral position of the dip in this chiral fibre changes with temperature allowing it to be used as a temperature sensor.

‘This monolithic glass solution does not rely on photoinduced gratings or coatings or moving parts, thereby offering the reliability inherent to glass,’ said Dan Neugroschl, chief executive of Chiral Photonics.

Product specifications are: 1,000C temperature range; one per cent accuracy; 0.01nm/C sensitivity (nominal); 300mm standard probe (metal sheathing) length; sensor/grating length of 15mm; sensor placement of 25mm from probe tip; and connector type FC/APC.

Other connectors and configurations are available upon request.

Chiral Photonics

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