The DSL-220 uses the standard single pass transmission measurement technique, with Transmitter/Receiver arrangement. A light beam emitted from the Transmitter passes across the stack to a Receiver, which measures the intensity of the received light. 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 DSL-220 is available with or without an Operator Interface (control unit), so for the most cost effective monitoring solution the DSL-220 can operate as a “stand-alone” instrument consisting of the Transmitter head (TX) and Receiver head (RX), with all electrical connections (including outputs such as the alarm relays, 4-20mA and Modbus) being made inside the RX head. As a stand-alone instrument the DSL-220 is set-up and controlled using the supplied utility software, installed on a PC or laptop, and connected via the USB connector on the RX.
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
- Free utility software for PC based setup control, and data logging
- Optional Operator Interface with different mounting configurations
