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Photodiodes & IREDs for Smoke Detection

Product information "Photodiodes & IREDs for Smoke Detection"

Excelitas provides photodiodes and IREDs as well as custom assemblies with specified signal level range to address the requirements of electro-optical smoke detectors.

An electro-optical smoke detector consists of an infrared LED light emitting diode (IRED) and photodiode assembly which exhibits a signal under the presence of smoke in the detection volume (smoke chamber). Signal range under smoke and clean-air conditions and their long-term stability are key features of a smoke detector module.

Such an assembly can be an optical block containing an IRED and PD for (SMD) board soldering or the complete smoke chamber, which are produced in high volumes. In addition to the components presented in the tables above, Excelitas can provide higher value-add assemblies for smoke detection applications, including the following:

  • An optics block which consists in a Photodiode-IRED pair selected, assembled into a plastic housing and tested to have a controlled range of transfer function between the IRED to photodiode signal under given smoke conditions.
  • A smoke chamber with base which can be easily integrated on a PCB for use with the optics block.

For further details on these or other sub-assemblies, including readout ICs, please contact the AMS Technologies experts to discuss your requirements.

Application: Electro-optical Smoke Detection


Please note that Excelitas products are available from us only in Denmark, Finland, Iceland, Norway, and Sweden. 

Manufacturer "Excelitas Technologies"

Excelitas’ thermal infrared sensors like thermopiles or pyroelectric IR detectors (PIR) are used for motion detection, presence monitoring, temperature measurement and gas detection. Excelitas’ broad portfolio of sensors, detectors and emitters also includes phototransistors, photodiodes, PIN photodiodes, avalanche photodiodes (APD), ambient light sensors, single photon detectors and many more.


The products can be found in a vast array of applications across automotive, consumer products, defense and aerospace, industrial, medical, safety and security and sciences sectors.


Please note that Excelitas products are available from us only in Denmark, Finland, Iceland, Norway, and Sweden. 

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