S304 / S304 Ex Emission Monitor

Emission monitor that can be calibrated to give mg/m3 output

For applications requiring absolute value measurements of dust concentrations, the S304 can be calibrated to give the user a mg/m3 output.  Once calibrated, this dust monitor helps plant operators know exactly how much dust is passing through the stack or outlet duct of their plant.

The S304 is additionally equipped with a 4-20 mA signal and two independent alarm relays that can be used to further optimized process conditions in the plant.


  • Easy start-up and commissioning
  • Rugged design for harsh industrial conditions
  • Proven technology
  • Accurate dust measurement
  • Extremely wide measurement range
  • Detection limit of 0,01 mg/m3
  • Multipoint calibration
  • Normalized measurement response
  • Flow speed compensation (optional)
  • Automatic Zero and Span check
  • 4-20mA, RS485, USB, two status
  • relays and wireless option
  • Local display, user interface and 3 color status LEDs

S304 Ex is IECEx/ATEX approved

Ex model is suitable for Zone 20, 21 and 22 inside and Zone 21 and 22 outside the duct.