The Fluke Pressure Vacuum Module, No. PV350, turns a digital multimeter into a complete measuring system, adding digital pressure and vacuum measurements to the existing capabilities of a DMM. It is compatible with all Fluke and most popular DMMs, according to the company. It also measures vacuum to 76 cm Hg, as well as displays results in English (psig of Hg) or metric (kPa or cm Hg) units.