VEGA VEGAPULS SR 68 Modbus and Levelmaster protocol - Manual (Page 29)

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4 Mounting
VEGAPULS SR 68 • Modbus and Levelmaster protocol
41371-EN-130624
In case of extreme dust deposits in the antenna system, VEGAPULS
SR 68 is available with a rinsing air connection. The air is distributed
via channels in the antenna system and keeps it largely free of dust.
Fig. 26: Purging air connection with horn antenna
Fig. 27: Purging air connection with parabolic antenna
The practice has shown that a pressure of approx. 0.2 … 1 bar
provides a sufficient air flow (see diagram in chapter "Technical data",
"Purging air connection".