Opacimeter

An opacimeter is a measuring device for measuring the turbidity of gases and liquids. The term is mainly used for devices for measuring the opacity of exhaust gases from diesel vehicles, which serves as a rough measure of the particle content of the exhaust gas.

It contains an elongated chamber through which the exhaust gas flows, at one end of which there is a strong light source and at the other end an optical sensor. The attenuation of the light beam through the particles in the exhaust gas is measured. Heaters or air curtains prevent soot from remaining on the optics.

Areas of application are the investigation of the engine management and emission control system as well as measurements on test stands.

See also

• Cloudiness
• Turbidity meter

Individual evidence

1. ↑ ^{a b} Richard van Basshuysen, Fred Schäfer: Handbook Internal Combustion Engine Basics, Components, Systems, Perspectives . Springer-Verlag, 2014, ISBN 978-3-658-04678-1 , pp. 1076 ( limited preview in Google Book search).
2. ↑ Kai Borgeest: Measurement technology and test stands for internal combustion engines, measurements on the engine, exhaust gas analysis, test stands and media supply . Springer-Verlag, 2016, ISBN 3-658-10118-0 , pp. 216 ( limited preview in Google Book search).