Lead salt detectors to detect fires in IR sensors

2nd May 2018
Daisy Stapley-Bunten


Since its founding in 1982, LASER COMPONENTS has specialised in IR sensors for use in flame detection devices. It manufactures lead sulphide detectors at its assembly plant in Arizona and pyroelectric detectors in Florida. A flame will flicker randomly at a rate between one and 20Hz when it is burned naturally, modulating any IR signal generated. 

Pyroelectric and lead sulphide detectors sense this modulated IR light and so can provide a warning of the presence of a flame.

The PB25 PbS detector is a cost effective sensor for this application and generates a response to the presence of a flame in 30ms at ranges out to 65m. The signal to noise characteristic of the IR sensor determines the range and sensitivity of the flame detection instrument and LASER COMPONENTS has recently added a differential pyroelectric detector to its portfolio of sensors with improved signal to noise performance.

This new product provides flame detection appliance manufacturers with an innovative detector with improved range and immunity to electromagnetic interference.

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