DSL-320

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.

Features

Gas flow's measurement

In situ measurement directly in exhaust gas flow

Opacity's measurement

Measurement reading as % Opacity

Modulated green LED source

Modulated green LED source for long lifetime stability and immunity to ambient light

Rugged construction

Rugged 316 stainless steel construction

Calibration

In-situ zero and calibration check facility

Interface options

Choice of interface options enabling easy integration

Free utility software

Free utility software for PC based set-up, control and data logging

Optional Operator Interface

Optional Operator Interface with different mounting configurations

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Resources

DSL-320
Brochure

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.

Benefits

Simpler installation than single pass opacity monitors
Better accuracy over shorter path lengths than single pass opacity monitors
Rugged design with no moving parts so low maintenance
Latched head and lid design to enable ease of access for installation and maintenance