The Importance of Measuring Actuation Force Image Credit: Stable Micro Systems Ltd What is an Actuation Test? An actuation test measures the process that occurs when a mechanical device operates. For example, the release of a hairspray aerosol, a liquid soap hand pump, an inhaler barrel, or a keyboard or camera button. It is a non-destructive test, simply causing a device to function in the way in which it was designed and used to measure every aspect of interest of this function. Why are Actuation Tests Important? Many characteristics of actuation can be measured, and the parameters of interest depend on the product under investigation. In the case of an aerosol, hand pump, or inhaler, the main parameter required is the force used to expel its contents. The travel that occurs during actuation is also frequently important.