Dust opacity monitors

July 2005 Analytical Instrumentation & Environmental Monitoring Financial (Industry)

The D-CEM2100 opacity monitor (top) 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.

* Dual-pass transmissometer.

* Auto zero and span check.

* Dynamic misalignment check.

* Normalised reporting.

* Remote data display.

* Data in % opacity, mg/m³, mg/Nm³ dust.

The D-CEM1000/1001 opacity monitors (bottom) consist 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.

* Simple installation - high reliability - very low maintenance.

* Proven technology meets legislative requirements.

* Data in % opacity, mg/m³, mg/Nm³ dust.

* Lens contamination minimised by efficient air purging.

* Long source life >5 years.

For more information contact Environmental Process Analytics, 012 661 6528.

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