The 3M™ Series 100 Automated Integrity Testing Device is designed to perform a pressure hold integrity test on membrane filter cartridges. This compact, battery powered system can be operated independently of any AC supply for up to 12 hours and should, for any reason, the unit remain uncharged retain all data in it’s memory for up to 6 months. The microprocessor-driven 3M™ Series 100 Automated Hand-held Integrity Testing Device can be programmed with up to 19 different test protocols, allowing the user to store commonly used test parameters covering all housing and filter combinations in use. Each of the different protocols can be quickly accessed through a single key stroke, with up to 200 test results being automatically stored ready to be recalled and printed at a later date.