DUCON Technologies - MIP Division

Cems Questionnaire

	The V-CEM5000 uses an infrared cross-correlation technique that requires no contact with the flue gases. The method used resembles flow measurement with chemical dye or radioactive tracers, where the velocity is derived from the transport time of the tracer between two measuring points a known distance apart. However, instead of an artificial tracer being added, the naturally occurring fluctuations of the infrared energy in the gas stream are used as the tracer. Fully purged transducers with no moving components make the system highly reliable and minimize maintenance requirements. The instrument is ideally suited to monitoring the flow rate of hot, dirty gases. Each transducer unit consists of a broadband infrared detector, a lens to focus the radiation received on the detector and a pre-amplification circuit board, all housed within a fully sealed, epoxy-coated aluminum enclosure. The transducers are supplied with air purge units to maintain the cleanliness of the transducer windows. Specification Measurement Range selectable to 50m/s Response selectable 10 seconds to 30 days Accuracy < ±2% of measurement Serial Port data bus I/P & O/P. Construction fully sealed (IP65) epoxy-coated Aluminum enclosures Ambient Temperature Limits –20 c to +70 C Power Requirements SCU 86-264V AC max. V-CEM 48V DC (from SCU) Air Purge Consumption 0.25 l/s @ 1.5 bar (compressed air); Dry (to -20°C) Clean (better than 10µm) Download PDF
Ducon Gas Velocity Monitor provides a non-contact measurement of gas velocity using a time-delay correlation of flue gas infrared emissions received by two detectors spaced a fixed distance apart suitable for all combustion gases including hot gases and gases with high dust loadings. Gas velocities ranging from 1m/s to 50 m/s can be measured. The Model V-CEM5000 is suitable for all combustion gases including hot gases and gases with high dust loadings. The velocity monitor incorporates integral automatic procedures for span checking and interfaces directly with the SmartCEM station local data bus so that all diagnostic and measurement data may be accessed by the SmartCEM Control Unit
Suitable for mass emissions analysis Fully compliant to 40CFR60 and 75 Remote MODEM/Web access Continuous real-time measurement Non contact measurement Straight path installation No moving components Auto low & high span checks
Low cost IR Flow monitor for compliance reporting Simple installation with only FOUR modules, Transmitter A, Transmitter B, Power supply and Signal Processor, all NEMA 4X rated Most suitable for emissions monitoring as well as closed loop online insitu process control with 10 secs response time

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