Dust Emission Measuring System

The StackGuard continuously monitors the scatted light intensity of an extracted, withdrawn sample of gas. The laser light source minimized stray light and improves sensitivity to the µg/m³ level, the filtered purge air prevents from window soiling. A calibration check is performed by means of a checking rod. The sample air is led out of the stack, heated up above the dew point and then fed through the measuring cell.

  • The tried-and-tested measuring system for tough jobs, e.g. continuous monitoring of tiny concentrations in dry or wet and hot gases
  • Continuous measurement of particulate matter concentration via scattered light principle
  • Compliance with EN 14181


Nominal range

0 .. 100 PLA (Polystyrol-Latex-Aerosols)

Scale ranges

max. 8 ranges between 0..0.05 PLA and 0..30 PLA
other ranges on request
adjustment range 1.0 PLA (mandatory item)


0.0002 PLA


Additional weather protection required for outdoor installation

Sample flow rate

790 .. 930 l/min @ 160°C

Power input

5.5 kVA (basic version with 2 heaters)
+1.0 kVA per additional 1.0 kVA heater
+1.5 kVA per additional 1.5 kVA heater
+2.0 kVA per additional 2.0 kVA heater


ca. 240 kg (basic verson)

Sample temperature

max. +170°C

Sample pressure

max. ±3'000 Pa (±30 mbar)


Profibus DP (optional)
RS-232 diagnostic interface


2 x 0/4 .. 20 mA, max. 600 ohms
5 x relais contacts max. 250 VAC, max. 4 A
digital in-/outputs max. 5 V

Ambient environment

-20 .. +50° C
0 .. 99% rel. humidity, not condensing

Maximum service altitude

3,000 m above sea level

Power supply

3 x 340 .. 440 VAC, 50/60Hz

Uninterruptable power supply

230 VAC / 195 W


max. 25 AT