First Choice for IR Applications – Signal-to-Noise Ratio Significantly Increased

UK59-0330

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.

Datasheet:

Further product information:
Differential Pyroelectric Detector