Product news

With the LIM‐082, InfraTec presents the smallest beam splitter detector in current mode.

With the LIM‐082, for the first time InfraTec offers a beam splitter detector in a TO39 housing in current mode. In
addition to the internal beam splitter, the latest model in the PYROMID® series also has an integrated operational
amplifier.

The PYROMID® Detectors from InfraTec
The miniaturized multi‐channel detectors of our PYROMID® detector series impress with their compact, highly
integrated design. Some of these detectors also have integrated reflection beam splitters consisting of highly
reflective, gold‐plated microstructures. The complex design and manufacturing requirements for these detectors
meant that, until now, only integrated amplification in voltage mode was possible in the TO39 design. With the LIM‐
082, users of gas measurement technology can work with a beam splitter detector with an integrated operational
amplifier in a TO39 housing in current mode for the first time.

The LIM‐082 ‐ A Product of Highest Manufacturing Competence
Some PYROMID® detectors with a stacked design in a TO8 housing already come with an integrated operational
amplifier. As an innovation leader for infrared detectors, InfraTec now combines two technologies in a miniaturized
design for the first time: beam splitter and operational amplifier in a TO39 housing. The LIM‐082 with its integrated
operational amplifier provides a large, low‐impedance output signal, which is why it is insensitive to interference
coupling. This makes the LIM‐082 suitable for direct connection to an A/D converter of a microcontroller. Even
smallest gas concentrations can be measured precisely with fast response. The compressed design of the LIM‐082
allows integration into the smallest end devices for gas analysis – for example for portable applications.

Special Features of a Beam Splitter Detector
Beam splitter detectors have an internal arrangement of micro mirror surfaces that act as internal beam splitters.
When the incoming radiation hits these highly reflective gold‐coated microstructures, it is split into several radiation
beams of equal intensity but different directions. These beams then hit a pyroelectric sensor element with an
upstream optical filter.

The beam splitter principle offers the benefits that mechanical expansions in the optical system of the measuring
device, ageing effects or possible contamination in the optical path influence all measuring channels in the same way.