Abstract: Powder spraycoating facility. It is automatically switched between a first operating mode where only recovery powder is moved into an intermediate receptacle (24) and a second operating mode wherein only fresh powder from a fresh powder unit (70, 74) is fed to the intermediate receptacle (24). Preferably switching may be carried out from the second operating mode to a reserve powder operating mode when, following switching from the first operating mode to the second operating mode, an intermediate receptacle sensor (S1) continues to transmit a “powder needed” signal.

Abstract: An emptying unit for powder bags used in powder spray coating facilities comprises a bag-receiving hopper which seats a powder bag and is narrower at its bottom than at its top to keep the powder bag dimensionally stable and in a position such that the bag aperture is situated in the upper bag end.

Abstract: A powder-level sensor unit comprises at least one sensor (102) of which the sensor measuring surface (108) is covered by a compressed air chamber (106). The compressed air chamber (106) is bounded on its side opposite the sensor measuring surface (108) by an air-permeable porous front wall (110). The front wall (110) is designed in a manner to be permeable to compressed air but impermeable to the spraycoating powder.