What is the pyroelectric effect?

The pyroelectric effect is one of the most efficient ways available for detecting thermal radiation or infrared radiation from the near infrared region and above.

It is essentially an electrical response to changes in light levels. The change in light level produces a change in temperature which in turn produces a change in voltage across a crystal.

The effect occurs in ferroelectric crystals with specific non-symmetric structural properties. At Pyreos we have a proprietary approach to the careful growth of these crystals to ensure the highest levels of performance, reliability and durability in our sensors.

Its low power consumption, fast response times and stability over wide temperature ranges are some of its key advantages.

What is unique about Pyreos’ technology?

Pyreos offers over 10 years experience in manufacturing patent protected silicon-based thin-film PZT pyroelectric detectors which are uniquely small, light, and robust compared to standard bulk material pyroelectric detectors for infrared sensing. Using standard and well-established semiconductor manufacturing methods, Pyreos leads the world in thin-film pyroelectric technology based around its in-house expertise.

Compared to today’s other infrared detectors Pyreos’ thin-film PZT detectors perform much better in terms of response times (smaller thermal mass), responsivity and low power consumption.

Combined with its advanced proprietary digital and analog readout circuits and applications know-how, Pyreos detectors are creating new user applications by enabling users to place our small and easily connected detectors into new spaces, places and equipment that were previously unavailable. This makes sensing, collecting, analysing and using infrared data much more flexible and ubiquitous at low power costs.

What are the benefits of our technology?

Pyreos’ thin-film PZT pyroelectric sensor technology underpins a range of passive and active infrared sensors which can be used to analyse radiation across the entire infrared spectrum, and in particular in the mid-infrared spectrum. This is a range of spectrum which provides the best analytical data (“the fingerprint range”) and which many other sensors are unable to access substances and measure flames, presence and motion. The technology has a unique combination of benefits:

  • Performance:
    • Passive sensor and lowest power of any pyroelectric or thermopile sensor – suitable for IoT and mobile systems
    • Fastest response of any pyroelectric or thermopile technology
    • Highest responsivity (ie per unit area) allows smallest form factors
    • Withstands thermal shocks and high operating temperature ranges
  • Lower cost, smaller systems
    • No moving parts
    • Needs no cooling – cheaper, smaller and more robust
    • Needs less calibration
    • Low costs in very high volumes
  • Industry-standard manufacturing
    • Scalable manufacturing by world class foundries and packaging companies using standard semiconductor techniques to ensure high quality at high volume with low cost
    • Compatible with industry-standard high-temperature surface mount manufacturing processes which deliver lower design and production costs.
    • Silicon based manufacturing: Unrestricted design flexibility at a low cost of customisation

Linear Variable Filter (LVF) 2.5µm – 5µm or 5.5-11µm or broadband filter. Other filters available on request.

Linear Array Options
128, 255, 510 linear array.

Signal Readout
CMOS amplifier and multiplexer IC, analogue signal output, rapid scan up to 1kHz.

Robust metal package with 16 pin dual in line connector.