Siemens 547-202B RPM SM BAC +/-0.1"WC( 25 PA).25%FSSiemens 547 202B RPM SM BAC + 0. 1"WC( 25 PA). 25%FSDescriptionSiemens, Room pressure Monitor is designed for critical low differential pressure applications that require stringent pressure monitoring and alarming. The unit can be configured to monitor positive or negative pressure in protected environments and hospital isolation rooms per CDC guidelines. FeaturesIncorporates dead end differential pressure transmitter suitable for industrial and bio