The InfraTec GmbH Infrarotsensorik und Messtechnik company from Dresden, Germany, a manufacturer of pyroelectric infrared detectors launched a product line with integrated CMOS preamplifier technology. The detectors with JFET source tracking capabilities can operate in current mode and provide, for example, time response advantages. Due to a signal voltage of up to several hundred mV they can be coupled with a microcontroller.
This product line with integrated CMOS preamplifier has included single-channel detectors for single-supply operation for some years. The low power consumption of 40 µW at 2.7 V particularly suits requirements for the operation of portable analysers. The thermal compensation of these detectors ensures stable operation even under severe temperature fluctuations.
With the new LMM-274, InfraTec now offers a low-power detector with four channels, so that three gases can be measured simultaneously and a reference channel is also available. For the operation of the LMM-274, a battery for the power supply is sufficient (power consumption in single-supply operation is only 160 µW in contrast to 800 µW in split-supply operation). Due to the high sensitivity of > 90 kV/W, the LMM-274 is ideal for gas analysis in the wavelength range of 8–12 microns and can be used to identify alcohol or chlorinated hydrocarbons.
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