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The OCD-D-101 is a GM tube replacement kit for the CD V-700 introduced in 1963. [7] The kit, which was produced by Lionel Electronic Labs and EON Corporation, is designed to decrease the sensitivity of Model 6, 6A & 6B meters by ten times. This would result in the following ranges: x10 (0-5 mR/h or 0-3000 C/m) x100 (0-50 mR/h or 0-30000 C/m)
Fourier transform infrared spectroscopy (FTIR) [1] is a technique used to obtain an infrared spectrum of absorption or emission of a solid, liquid, or gas. An FTIR spectrometer simultaneously collects high-resolution spectral data over a wide spectral range.
An infrared detector is a detector that reacts to infrared (IR) radiation. The two main types of detectors are thermal and photonic ( photodetectors ). The thermal effects of the incident IR radiation can be followed through many temperature dependent phenomena. [ 2 ]
Infrared spectroscopy is also used in gas leak detection devices such as the DP-IR and EyeCGAs. [8] These devices detect hydrocarbon gas leaks in the transportation of natural gas and crude oil. Infrared spectroscopy is an important analysis method in the recycling process of household waste plastics , and a convenient stand-off method to sort ...
A nondispersive infrared sensor (or NDIR sensor) is a simple spectroscopic sensor often used as a gas detector.It is non-dispersive in the fact that no dispersive element (e.g a prism or diffraction grating as is often present in other spectrometers) is used to separate out (like a monochromator) the broadband light into a narrow spectrum suitable for gas sensing.
The Fellgett advantage, also known as the multiplex principle, states that when obtaining a spectrum when measurement noise is dominated by detector noise (which is independent of the power of radiation incident on the detector), a multiplex spectrometer such as a Fourier-transform spectrometer will produce a relative improvement in signal-to ...
It is commonly used in infrared point detectors where path lengths are necessarily short, and for open-path detectors requiring parts-per-million sensitivity. A disadvantage for many applications is that methane absorbs relatively weakly compared to heavier hydrocarbons, leading to large inconsistencies of calibration.
As of 2023, commercial SNSPD devices are available in multichannel systems in a price range of 100,000 euros. It was recently discovered that superconducting wires as wide as 1.5 μm can detect single infra-red photons. [12] [13] [14] This is important because optical lithography rather than electron lithography can be used in their ...
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