Pyroelectric detectors are designed for use in NDIR and FTIR spectroscopy, IR laser-based measurement technology, pyrometry, and flame and fire detection. There are many good reasons for the application of pyroelectric components: they are inexpensive, reliable, robust, and have, as thermal detectors, a high sensitivity from short to long IR wavelengths.
LASER COMPONENTS will be introducing new and improved pyroelectric detectors at the Sensor+Test: the LD2100 series with a differential amplifier.
Pyroelectric crystals generate positive and negative charge carriers simultaneously on opposing sides. The LD2100 series is the first series in which both crystal sides are amplified separately: the useful signals add up linearly, which means that they are doubled. The noise portions only add up statistically; altogether there is a net gain in the signal-to-noise ratio!
Compared to the bestseller L2100 series, we were able to double the signal in the new LD2100 pyrodetector series – at the same time the noise was kept almost constant at a low level. Our R&D team has reached deep into its bag of tricks and modified the components used accordingly. The actual improvement of the signal-to-noise ratio is, therefore, significantly greater than the purely theoretical value of 1.4. Our pyroelectric detectors with differential amplifiers have two additional advantages: External interference signals are eliminated by calculating the difference. These detectors can, therefore, be used in critical environments with electric fields. Furthermore, the LD2100 series make simple circuitry possible in which the signal output can be directly applied to the input of a differential AD converter.
