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  • Cutting Edge Technology in Most Confined Spaces

Cutting Edge Technology in Most Confined Spaces

Oct 10 2018 Read 476 Times

Since its foundation InfraTec focuses on most advanced sensor technology meeting the needs of industry and science. Latest result of this effort is a series of miniaturised multi channel detectors - the LRM series.

A mere glance at its appearance gives clues about these sensors first unique feature. In the cap where conventional multi channel detectors have sensitive narrow bandpass channel filters with special adhesive mounted, a robust central window has been added instead, e.g. made of silicon. It offers substantially better protection against environmental influences such as penetrating moisture. The central window can also be soldered to the housing to create a complete hermetic seal.

So Small and so Effective

The channel filters are placed inside the detectors instead. Shielded from mechanical stress as well as from other strains from harsh environments they are also located even closer to the pyroelectric elements. The reduction of this distance and the central window integrated into the detector caps ensure a wide field of view (FOV). At the same time, all elements are placed closer together inside the detectors. This allows more radiation to reach the pyroelectric element and therefore a higher signal. In addition, since the optical correspondence of the individual channels is supressed very effectively, the whole detector series proves to be extremely powerful.

Because of their modular stack design LRM detectors are available with and without thermal compensation. They are an example of an innovative product line, and one that provides users with additional possibilities for the use of sensors. With unchanged detector size the compact, miniaturised construction allows for an increasing number of channels and to detect more gases while the cuvette diameter remains constant. Or, the same number of channels can be integrated into significantly smaller packages, what leads to smaller measuring modules.

Additional Option: Wide Field of View

The LRM-244 is an example that counts among the models which operate in voltage mode. This miniaturised four channel detector comes in TO8 housing, with an aperture of 8.5 x 8.5 millimeters. It impresses with an extremely wide and symmetric FOV, which allows to detect flames within an angular range of more than 90 degrees. Pyroelements with a particularly large sensitive surface of 2 × 2 mm2 ensure an ideal signal-to-noise ratio.

Similar to the LRM-244 the LRM-284 operates in current mode. Its characteristic low power consumption qualifies for the operation of the detector in portable devices. Due to the compact stack design, this detector assembles four channels in a TO39 housing. In the fields of gas and flame sensor technology, this increasingly compact module size plays a crucial role.

Space and Cost Saving

Due to the minimised stack design, users of these miniaturized multi channel detectors gain important new flexibility and benefit directly from cost-optimised production. They get a solution for gas analysis that can be used in stationary and mobile devices ranging from medicine to safety technology and convinces with an attractive price-performance ratio.

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