The M Class Deltabar M PMD55 transmitter and its Cerabar line of pressure transmitters make it easier for legacy plants to upgrade to digital communications systems. The line is also certified for hazardous areas use. The Deltabar differential pressure transmitter can be used for flow measurement of gases, vapours and liquids; the Cerabar measures absolute and gauge pressure; and the Deltapilot is used for measuring hydrostatic liquid level in vented tanks.