G01N21/37 - CPC Classification Index

ClassID:

167853 ⎘

G01N21/37 - CPC Classification

Classification description:

Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light; Systems in which incident light is modified in accordance with the properties of the material investigated; Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands; Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infra-red light using pneumatic detection

Recent Application in this class:

20240159664

2024-05-16

NITROUS OXIDE SENSOR

20190041317

2019-02-07

Method for quantifying the amount of optically interfering gas impurities

20180299369

2018-10-18

GAS DETECTOR WITH NORMALIZED RESPONSE AND IMPROVED SENSITIVITY

20180284012

2018-10-04

Gas detector with normalized response and improved sensitivity

20170336308

2017-11-23

Heating arrangement for a material testing device

20130043391

2013-02-21

Non-Dispersive Infrared (NDIR) Dual Trace Gas Analyzer and Method for Determining a Concentration of a Measurement Gas Component in a Gas Mixture by the Gas Analyzer

20110032514

2011-02-10

Non-dispersive infrared gas analyzer

20100134784

2010-06-03

Detector arrangement for a nondispersive infrared gas analyzer and method for the detection of a measuring gas component in a gas mixture by means of such a gas analyzer