Analytical Instrumentation & Environmental Monitoring


Dust opacity monitors

August 2005 Analytical Instrumentation & Environmental Monitoring

The D-CEM1000/1001 single pass opacity monitor (see diagram) consists of a visible light transmitter and receiver arrangement with digital data processing in a local display unit. The monitors can display data in either opacity, extinction or dust density in mg/m3 or normalised dust density in mg/Nm3. The D-CEM1001 possesses four analog outputs for normalisation data; temperature, oxygen, pressure and water vapour.

These low-maintenance instruments are simple to install and their proven technology meets legislative requirements data in % opacity, mg/m3, mg/Nm3. Dust lens contamination is kept to a minimum by high-efficiency air purges.

Dual pass instrument

The D-CEM2100 opacity monitor is a dual-pass transmissometer configured for the measurement of opacity and dust concentration within the flue gas. Its unique optical arrangement provides continuous measurements of transmissivity of visible light across the flue in opposite directions, providing an accurate average of the dust loading within the duct, as well as a dynamic assessment of any misalignment errors that may occur due to duct movement. Other features include an auto zero and span check, normalised reporting and remote display of data in % opacity, mg/m3, mg/Nm3 dust.



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