Ultrasonic stack gas flowmeter
March 2006
Flow Measurement & Control
Durag's D-FL 200 volume flowmeter is an ultrasonic measuring system operating on the differential transit time principle. The system provides continuous measurements of standard flow and velocity and in-situ measurement is directly in the flue gas flow. The measurement system is especially designed for flow monitoring below the dew-point and for aggressive gases.
Automatic zero point and reference point control is possible while inputs for temperature and pressure correction are available. The sensors are completely de-coupled from the gas by means of purge air.
The transducers continuously transmit and receive impulses, while the gas flow alters the transit time. The time upstream is reduced and the time downstream is prolonged. The system meets IP65 protection requirements, and the length of the measuring range is up to 8 m with a maximum operational temperature of 200°C.
High pre-scaleable limit values are indicated immediately, permitting necessary interventions in the plant's control system in order to comply with prescribed emission values. The system is programmable via the evaluation unit's keys or via the PC.
For more information contact Noel Bauchop, OEN Enterprises, 011 675 4447, [email protected], www.oenenterprises.co.za
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