DSL-320 MkIII
Double Pass Opacity Monitor for monitoring opacity and smoke emissions
The DSL-320 Opacity Monitor is an optical instrument designed to measure the visible opacity of exhaust gas in a duct, stack or flue.
DSL-320 MkIII
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 smoke density 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 higher the level of particulate or smoke present, the more light lost and therefore, the greater the opacity.
Optional accessories
- Operator interface (OI)
- 90-260 Vac model available
- Mounting flange installation kit
- Laser alignment tool to assist with installation
- Air purge blower kit (110 Vac / 230 Vac / 415 Vac)
- Compressed air purge kit
- Reference filters for routine calibration check of the instrument
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