Abstract: A dosing device with a dosing mechanism and a dispensing mechanism for providing a metered amount of a powdered or granular substance. The dosing mechanism has a reservoir (2), a rotatable central axis (5) to which a rotatable actuator (3) and a rotatable member (65) metering a volume of the powdered or granular substance to be dispensed is rotationally fixed, at least one dosing chamber (6). The rotatable actuator (3) drives the rotation of the central axis (5) and the rotatable member (65) in at least one rotational direction. The dosing chamber (6) can take a fill state and a release state, which is defined by its angular position. The dispensing device may comprise a dispensing mechanism with a rotatable metering disc (65) having one or more dosing chambers (6).

Abstract: The present disclosure relates to a pressure measuring device configured to measure positive pressure and negative pressure. The pressure measuring device may comprise a sealing part, a ring configured to be in contact in use, and a protrusion.