Abstract: An inhaler for delivering a medicament to a patient includes an actuator housing for holding the medicament. The actuator housing includes an air inlet for receiving air flow. The actuator housing further defines an air flow path into which the medicament is dispensed. The inhaler also includes a sensor disposed proximal to the air inlet. The sensor is configured to detect an obstruction of the air inlet and to generate an output signal indicative of the obstruction. The inhaler further includes a feedback device configured to receive the output signal from the sensor and to generate a feedback signal. The feedback signal indicates an obstruction of the air inlet.

Abstract: An inhaler having an air inlet, a medicament source, and an outlet for delivering an air and medicament admixture to a user, wherein the inlet is defined by a coverplate assembly comprised of a plurality of overlapping coverplates to inhibit the ingress of airborne contaminants.