Abstract: A flow indicator (F) for an inhaler (I) comprises a housing (1) defining a mouthpiece (M2), an inlet (2) for connection to the product-dispensing chamber of the inhaler, a chamber (3) positioned between the inlet and the mouthpiece of the indicator, and an indicator member (4) movably mounted in the chamber in such a manner that inhalation at the mouthpiece of the indicator causes the indicator member to move within the chamber. The indicator member (4) is so mounted as to co-operate with a switch member (6, 9) associated with the housing (1) to provide an indication when inhalation is at an optimum rate for a given inhaler attached to the inlet (2).

Abstract: A flow indicator (F) for an inhaler (I) comprises a housing (1) defining a mouthpiece (M2), an inlet (2) for connection to the product-dispensing chamber of the inhaler, a chamber (3) positioned between the inlet and the mouthpiece of the indicator, and an indicator member (4) movably mounted in the chamber in such a manner that inhalation at the mouthpiece of the indicator causes the indicator member to move within the chamber. The indicator member (4) is so mounted as to co-operate with a switch member (6, 9) associated with the housing (1) to provide an indication when inhalation is at an optimum rate for a given inhaler attached to the inlet (2).