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The DSL-460 Opacity Monitor uses a double pass light transmission technique to measure dust, smoke and particulate emissions present in an exhaust gas flow in a duct, stack or flue. A light beam emitted from the Transceiver (TRX) passes across the duct, stack or flue to a Reflector, which returns the light beam to the TRX. Any dust or smoke particles present will attenuate the light beam and cause the intensity of the light received by the TRX to fall. The amount of light lost in crossing the duct, stack or flue is the Opacity and this correlates to the amount of dust or smoke present in the gas flow.

  • In-situ measurement directly in exhaust gas flow
  • Measurement reading as % Opacity or particulate as mg/m3
  • Integrated visual alignment aid to simplify installation
  • In-situ zero and calibration check facility
  • Choice of interface options enabling easy integration.
  • Measuring Principle: Light Transmission
  • Operating Wavelength: 510- 540 nm (Green LED)
  • Measurement Reading: Opacity(%) or Particulate(mg/m3)
  • Measuring range: Opacity:0-100 %

                                 Particulate density: 0-1000 mg/m3

  • Accuracy: +/- 2 %
  • Voltage : +24 Vdc (optional 90-260 Vac PSU available)
  • Ingress Protection Heads: IP 65
  • Ambient Operating Temperature: -20 to + 50 °C
  • Analogue Outputs: 4-20 mA

Serial Communications : Modbus RTU, Internal USB

  • Plug and socket connection enabling simple installation
  • Better accuracy over short path lengths
  • Rugged design with no moving parts so low maintenance

Latched head design to enable ease of access to optics for maintenance

  • Process control for verification, optimisation and fault diagnosis (non compliant processes)
  • Marine industry for monitoring smoke emissions from diesel engines, incinerators and boilers
  • Post particulate removal systems such as filter bag houses, electrostatic precipitators or cyclones
  • Boilers and combustion furnaces

DSL-460 Brochure