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Dual Pass Opacity / Dust monitor

The DCEM2100 is a dual-pass transmissometer configured for the continuous measurement of opacity and dust in flue gases.

DCEM2100 Dust Monitor


The DCEM2100 provides a continuous measurement of opacity or dust concentration in flue gases by continuously measuring the transmissivity of visible light across a process duct or stack.


Its dual-pass optical arrangement is based on twin transmissometers measuring in opposing directions through the same section of the gas stream, providing not only an accurate average of the dust loading, but also providing a unique dynamic assessment of any misalignment errors due to stack movement.

Features & Benefits



Typical Applications

Brochure Download

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      DCEM2100 Specification

      Measuring units% opacity, mg/m3, mg/Nm3
      Accuracy±0.2% opacity
      Ambient Temperature-20°C to +70°C
      Power supply48V DC supplied from Power Supply Unit (PSU)
      Construction Corrosion resistant epoxy coated aluminium housing sealed to IP66
      Analogue outputs2 x 4-20mA current outputs, isolated, 500Ω load max. fully configurable from keypad
      Logic Outputs2 x volt-free SPCO contacts, 50V,1A max., configurable as alarm contacts
      1 x volt-free SPCO contact, 50V,1A max. for data valid
      Serial DataRS232/RS485 MODBUS protocol (Optional)

      For a full product specification please download the product brochure below.