PS11 Capable Forward Scatter Particulate CEM

STACK 181

US EPA PS11 compliant ProScatter™ particulate CEM providing high quality emission measurement for low dust concentrations from industrial processes

Utilising the patented ProScatter™ Forward Scatter measurement technique for measuring particulate concentration levels, typically between 0.06 mg/m3 to 300 mg/m3, this measurement technique offers improved levels of performance which make the STACK 181 very suitable for use as a PM CPMS or PM CEMS that need to comply with US EPA PS-11 for Site Operators looking to satisfy the recent MACT and MATS rules.

The STACK 181 is suitable for measuring particle emissions after both bag filter and electrostatic precipitator arrestment plant.

  • Robust design with no critical moving parts
  • Available for use in high-temperature stack conditions and Ex hazardous zones
  • Easy to fit multi-patterned flange
  • Adjustable monitoring depth to ensure sampling in the most representative part of the flow path
  • For use as PM-CPMS or PM-CEMS that need to comply with PS-11
  • ProScatter™ technology offers enhanced measurement due to reduced cross-sensitivity of particle type and size
  • Features automatic zero and upscale checks that fully challenge the system’s ability to measure forward-scattered light and satisfy daily drift checks
  • Easily audited with manual filters
  • Stacks after bag filters, cartridge filters, cyclones, electrostatic precipitators, no filtration.
  • Non-condensing / dry flue gases
  • Incineration
  • Metals eg Steel/Aluminium
  • Minerals eg Cement/Gypsum
  • Chemicals eg TiO2 / Refinery
  • Power Generation Plant eg Coal/Biomass
Technical Specifications
Measured parameters Dust
Technology ProScatter™ Forward Scatter
Measurement/Monitoring capability 0-200 mg/m3*
Stack/Duct diameter suitability up to 8m
Flue gas temperature up to 500°C
Baghouse YES
Cartridge Filter YES
Ceramic Filter YES
Coalescent Filter YES
Cyclone YES
Electrostatic Precipitator (ESP) YES
Wet Electrostatic Precipitator (WESP) /
Wet Scrubber /
Sensor variants Stainless Steel
QA checks YES

*Application dependant

Technical data
Measurement capability 0 – 1000 mg/m3
Certification Range 0 – 15 mg/m3
0 – 100 mg/m3
Resolution 0.01 mg/m3
Sensor Variants Stainless Steel (standard). Corrosion resistant Hastelloy (option)
Stack Temperature Ranges 0-250°C. Up to 500°C option
Functionality and QA Checks Automatic zero and upscale checks QA data logging
Data Output RS485 (Modbus) output to Controller
Air Purge requires continuous air purge
Enclosure Protection Rating IP66
  • US EPA PS-11 compliant
  • Ex Zone 2