Multi Channel Detectors

As the first representative of the LRM series, the LRM-254 marks the starting point for all other models. The miniaturized four channel detector in a TO39 housing with an square aperture opening of 5 mm has the typical features of this product series: cap with central window, channel filters inside the detector, miniaturized stack design, large FOV.

The detectors with the smallest housing size in the miniaturized LRM range are the LRM-102 and LRM-202. Both dual channel detectors are integrated in TO46 housings. Their aperture opening has a size of approximately 6 mm2 each. As a solution e.g. for gas analysis and leakage detection, they can be used in stationary and mobile devices ranging from medicine to safety technology.

An enormous field of view (FOV) distinguishes the LRM 244 from other detectors of the LRM series. The extremely large, symmetrical field of view of the detector of more than 90 degrees enables flames to be detected within the greatest possible angular range. In addition to this, pyroelements, each with a particularly large sensitive surface of 2 × 2 mm2, ensure an ideal signal-to-noise ratio.

On the market there are only a few miniaturized multi-channel detectors operating in current mode. Therefore the LRM-284 is definitely something special. The current mode of the single supply detector is enabled by two double-operational amplifiers. This detector allows the design of an analyser with low power consumption – a fact which particularly speaks for the operation of the detector in portable devices.

The LRM-278 is the world's first detector of its kind to combine eight measurement channels in a TO8 housing with a diameter of 15.2 millimetres and operates in current mode. It also incorporates a temperature sensor. Measuring the temperature inside the detector, for example, provides the option of compensating the typical temperature drift of the filters very accurately by means of a calibration.

As a specialist in flame detection technology the LRM-274 expands the range of detectors, that are characterized by a field of view wider than 90˚. The low-power detector requires only one unipolar supply voltage and is particularly suitable for operation in industrial fire protection and early fire detection devices. Due to its integrated heating resistors users themselves can test the detector if necessary.