Abstract: An apparatus for inserting a canister (3) into an inhaler actuator device (20), wherein the apparatus comprises a force sensor (25) adapted to measure a reaction force between the canister and actuator device as the canister moves relative to the actuator device, and a corresponding method.

Abstract: The present disclosure is in the technical field of dent detection in canisters. Accurate and consistent detection of dents in canisters has been a problem in the industry for some time. The present disclosure describes an apparatus and method that addresses this technical problem in a repeatable and easily implemented manner. There is provided a dent detection apparatus including a conduit dimensioned to be the maximum allowable diameter of a canister, a transportation portion for transporting a canister through the conduit and a rotation portion for rotating the canister as it passes through the conduit. A sensor detects when a canister stops rotating and gets stuck in the conduit and alerts the user. Thus faulty canisters can be detected and removed from production.