The Dusty C works on the basis of the electrodynamic principle. A charge transfer occurs as soon as particles flow past the measuring probe.
A measuring signal is generated from this, which triggers a switching contact as soon as a limit value is reached.
The Dusty C is a compact device that works with a 24 V DC power supply. The device is supplied precalibrated. The switching point is around 25 mg/m3 dust*. At the current output this value corresponds to an output signal of 12 mA.
The sensor provides the user with the option of defining the alarm thresholds himself. This can be done in a range between approx. 5 mg/m3 and approx. 150 mg/m3. The corresponding switching stage can be changed in approx. 5 mg increments simply by pressing a button.
* Precalibration is carried out on SWR’s in-house test bench with organic dust under the following conditions:
Duct diameter = 250 mm
Air velocity = 14 m/s
Temperature = 25 °C