>> For the FW 300, the approved transmission principle has been re-packaged in a compact, modularly constructed instrument and the application data has been improved and extended. Therefore the FW 300 is suitable for nearly all measuring tasks, by using the transmission method to check, monitor or control the dust concentration values: e.g. in processes, factory buildings, quarry mill works and filter plants. The fields of application range from power plants to the building material industry up to food industry.

The FW 300 is suitable for measuring distance from 0.5 m up to 15 m and is working trouble-free and with precision even under very unfavorable conditions. Sticky dust, high gas temperatures, varying gas velocities are no problem for the FW 300.

The physical units of transmission, opacity, extinction or dust concentration are freely selectable. Due to the modular construction of the instruments, the project engineering can also be flexible, thereby reducing costs.

With the scattered light monitor FW 100 we offer high performance, where other technologies fail. With this measuring technique, integrated in a measuring probe, very small dust concentrations can be measured precisely. With the FW 100 neither mechanical alignment nor adjustment in dust-free measuring environment is necessary.

How the monitor works:
The red laser light beam goes through the probe into the real measuring volume, which is defined by a 50 mm aperture at the end of the probe. If there are dust particles in the measuring aperture, the light will be scattered by these particles. A part of this scattered light reaches the receiver optics via an optic fiber cable located in the probe. The measurement of the dust concentration here is also independent of the gas velocity. The measuring ranges are freely selectable between 0–5 mg/m³ and 0–200 mg/m³.

New and potential cost savings are the common standards for both of these devices working with different operating principles. The dimensions of the monitors themselves and thereby their flange sizes are identical. Both systems use the same purge air blower for cooling and cleaning the optical surfaces. The blower is integrated in the connection box which is constructed identically for both systems. As for the software, the MEPA operating program for menu-driven parameterization can be used for both FW 100 and FW 300.

Both units have an automatic control cycle for zero and span with freely-selectable cycle interval. Consequently the correct function of the unit is transparent at any time, without the need for any additional tools. In addition, the FW 100 is equipped with a contamination measurement. The calibration data, which is determined by a gravimetric comparison, will be stored in the FW 100 and FW 300 and provide the relationship to the dust concentration.

The SICK-MAIHAK dust monitors are certified in many different countries and TÜV approved – for the German regulation and many applications in Europe. In addition they are conform to EPA standards for the US and the Far East market, GOST certified for the Russian market and approved by Kaitec for Korea. An MCERTS test according the newest English guideline is in progress.