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Dynamic Opacity Particulate & Opacity Monitoring System

Supplier: Phoenix Instrumentation

The SC602 is a modbus based cross-stack optical measuring system which uses a dynamic sensing technique to measure the rate of change of light (Dynamic Opacity) as particulates pass through a modulated light beam.

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This proven optical technique, coupled with advanced design features, offers significant reliability and resolution advantages over traditional Opacity monitors and virtually overcomes lens fouling associated with standard Opacity monitors.

The SC602 provides similar dust measurement capability to the PCME SC600 which is already approved (by TUV and MCERTS) for dust measurement in the range 0-150mg/m3 in coal power plant applications.

Principle of Operation

The SC602 measures the effect of particles on a light beam transmitted across the stack. The instrument measures the ratio of the temporal variation in intensity to the intensity, unlike traditional Opacity instruments in which the beam intensity is simply measured. This intensity variation derives from the statistical variations in the distribution of particles in the air-stream.

The higher the concentration of particles, the greater the range of variation. Empirical results confirm a repeatable relationship between Dynamic Opacity and dust concentration.

A linear relationship has been demonstrated in 3rd party independent approvals such as MCERTS and TUV and permits the instrument to be calibrated in mg/m3 by comparison to the Standard Reference Method of Iso-kinetic Sampling (ISO 9096).

The SC602 is primarily designed for applications with typical emissions in excess of 25 mg/m3 where interferences from water vapour and heat effects are small compared with dust signals.

The instrument will also operate at much higher dust concentrations (up to 500 mg/m3)* and is capable of measuring as low as 5 mg/m3* in applications with ambient temperature and low humidities.

The SC602 can also measure Opacity (and extinction) directly and this output is available for processes which are still regulated and controlled in terms of Opacity (Colour impact) rather than dust concentration in mg/m3.

More Information on Dynamic Opacity Particulate & Opacity Monitoring System (pdf) >>

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