Ultrasonic Cleaner Foil Test is commonly used to check your Ultrasonic Cleaning Equipment to make sure it’s Cavitation is working fine to produce the required cleaning on your components. https://www.bjultrasonic.com/ Conduct an aluminum foil test on new equipment to establish a  baseline from which you can judge cleaning power performance on a regular basis (see below). Cut a strip of household aluminum foil and, wearing textile gloves, dip it in a degassed operating bath for one minute (1/2 minute without a basket in the tank). At the end of the test you should observe a surface texture that could look like pin pricks or see holes in the foil. Identify the foil with a marking pen and store it in a transparent sleeve for later use.