Helica Temperature Sensor

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Chiral Photonics has released a robust fibre optic temperature sensor to its Helica product family. The sensor has been designed for applications that require stability to 1,000°C.

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’ patented 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. 

The sensor has an accuracy of one per cent, a sensitivity of 0.01nm/°C (nominal), a probe (metal sheathing) length of 300mm as standard (with other lengths available upon request), a sensor/grating length of 15mm (with other lengths available upon request), sensor placement of 25mm from probe tip (with other configurations available upon request) and a connector type FC/APC (with other connectors available upon request).