The M Class Deltabar M PMD55 transmitter and its Cerabar line of pressure transmitters have ATEX, FM, CSA, NEPSI and IEC Ex certifications. The Deltabar M PMD55 differential pressure transmitter can be used for flow measurement of gases, vapors and liquids. It works over measuring ranges of 0.15 to 600 psi with a maximum recommended turndown of 100:1.