Siemens 547-317A RCM FM P1 +/-5.0"WC(1250PA)0.5%FSSiemens 547 317A The Siemens 547 317A is a highly reliable and efficient industrial automation supply designed for precise pressure measurement. With its advanced features, this product ensures accurate readings with a tolerance of only + 5. 0"wc (1250Pa) and an impressive accuracy rate of 0. 5%FS. This makes it ideal for applications that require precise control over pressure levels such as HVAC systems, cleanrooms, and industrial processes.