The DSL-320 uses the double pass light transmission measurement technique, with a folded beam Transceiver /Reflector arrangement. A light beam emitted from the Transceiver (TRX) passes across the duct, stack or flue to a Reflector, which then returns the light to the Transceiver where the intensity of the received light is measured. Increased particulate or dust in the stack gas attenuates the transmitted light and causes the intensity of the received light to fall. This reduction in intensity is measured and presented as % opacity.
The DSL-320 has no moving parts, is of rugged design and has an excellent reliability record. Regular maintenance simply involves cleaning the optical surfaces which are easily accessible due to our latched head design. Both the TRX and Reflector heads are supplied with an air purge body, which when connected to a high volume source of clean air, keeps the contaminated stack gas away for the lens surfaces. An Aluminium air purge body is available for use on standard installations and a more advanced Stainless Steel air purge body is available for more demanding installations.
Advantage:
- In-situ measurement directly in exhaust gas flow using the widely accepted light transmission technique.
- Measurement reading as % opacity.
- Modulated green LED source for long lifetime stability and immunity to ambient light.
- Rugged 316L stainless steel construction.
- Choice of interface options enabling easy integration.
- Free utility software for PC based setup, control, and data logging.
