Rotary, vane level sensor. The sensor blade rotates freely around the axis until it encounters resistance (tank filling). After the blade stops, the sensor contacts are switched.
The great advantage of the mechanical sensor is its resistance to contamination and dust.
The sensor is ATEX approved. The sensor is intended for materials with a density ranging from 0.5 to 2.0t/m3
https://www.aspar.com.pl/katalogi/ILT_0308.pdf
