OP Series - Opacity

Particulate Emission Monitor

To padronize the evaluation of gas effluents, EPA (Environmental Protection Agency), in 1971 approved the method 9 - Ringelman Scale.

The Opacimeter or particulate monitor is designed to comply with all the conformities of EPA- CFR, part. 60, Appendix b, Performance Specification.

Analytical Methods for monitoring of Particulated Monitor emissions:
Emission Monitor - ON-SITU
Determination of Particulated Material from Stationary Sources in Pipes and Chimneys - Isokinetic Sampling

Assuming that the measurement of opacity does not express Concentration , but only Turbidity of the gases, to establish a connection with the concentration of particulates, it becomes necessary to know:
Active Optical Step
Particle size and particle nature
Measurement range - concentration value to be monitored

Doubts of how the opacimeter works? Contact our experts or come and visit us and take part in one of our opacity training sessions.

See all models in the table below and click to compare or view the opacimeter characteristics of your preference.

Model Features


Description Range
Opacity Monitor -

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