FWE200 Dust monitor for wet gases

FWE200 Dust monitor for wet gases

FWE200 – Dust monitor for wet gases based on scattered light technology

The FWE200 dust measuring device is designed to measure dust concentrations in wet flue gas. The gas is extracted via a sampling probe and heated above dew point. Droplets in the gas are vaporized, making it impossible for them to falsify the measurement results. The scattered light principle enables even very low dust concentrations to be measured.


Measuring range
0 ... 5 mg/m³ / 0 ... 200 mg/m³
Higher measuring ranges on request
Measuring principle
Scattered light
Ambient temperatures
–20 °C ... +50 °C
Protection class
IP54 (control unit IP65)
2001/80/EC, 2000/76/EC,
27.BImSchV, TA-Luft, EN 15267,
EN 14181, MCERTS, 2010/75/EU,
U.S. EPA PS-11 compliant
Supply voltage
115 ... 250V AC / 47 ... 63 Hz
Analogue outputs
1x 0/2/4 ... 20mA, max. load 750Ω;
Electrically isolated, second output as option
Digital outputs
4 relay contacts: 250V, 1 A
Preset for failure, warning, limit value and maintenance
Digital inputs
1 input: Potential-free, for maintenance switch
≤ 2 % Of measuring range full scale
EN14181 QAL1 certificate
EN 15267-3 certificaat
Response time
1 s ... 600 s Freely adjustable
Measuring gas temperature
PVDF probe: ≤ +120 °C
Hastelloy probe: ≤ +220 °C
Dimensions (H x W x D)
830 x 730 x 340mm (FWE200 measuring and control unit)
FWE200 measuring and control unit: 65 kg
Sampling probe: ≤ 15 kg
Electrical safety




  • For very low to medium dust concentrations
  • Gas sampling and return combined in one probe
  • Contamination check
  • Automatic check of zero and reference point


  • Reliable dust measurement in wet gas
  • No moving parts in contact with aggressive gas, therefore low maintenance
  • Mounting directly at the duct due to compact design


  • Monitoring of wet gas purification plants
  • Measurement in saturated gas downstream of desulfurization plants
  • Determination of dust concentrations in wet exhaust air