Pyroelectric sensor produces digital output

The DigiPyro is billed as the world's first digital pyrodetector, a pyroelectric infra-red sensor for home and industrial motion detection applications.

New from PerkinElmer Optoelectronics, the DigiPyro is billed as the world's first digital pyrodetector, a pyroelectric infra-red sensor for home and industrial motion detection applications.

The DigiPyro PYD 1998 dual element pyrodetector provides OEMs with clear performance advantages over traditional analogue pyrodetectors and reduces the cost and space requirements associated with analogue circuitry.

The DigiPyro PYD 1998 is the first in a new series of digital pyrodetectors from PerkinElmer.

Until the introduction of the DigiPyro, traditional detection instrumentation relied on analogue signal processing for motion detection applications.

To process an analogue signal, these detectors require additional system components such as amplifiers, resistors, capacitors for EMI filtering, and A/D convertors, all components that add to system costs without improving performance.

While design considerations are different for each customer's equipment, indications are that system costs due to fewer components can be reduced by up to 20%.

Impaired by cellphone and other EMI signals, traditional analogue pyrodetectors are easily disrupted, making them less reliable in use in home and industrial settings.

There is significantly improved EMI immunity with the new DigiPyro.

Tests show that the power supply rejection ratio (PSRR) is improved by 30dB, a 32-fold improvement over the traditional analogue pyrodetector technology.

"The new DigiPyro illustrates PerkinElmer's commitment to deploying innovative solutions for a wide range of digital-based, motion detection applications", said Rick Weiler, Vice President and General Manager, Industrial Products, PerkinElmer Optoelectronics.

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