Siemens 547-002 Differential Pressure Monitor Without Key PANEL ONLY NEW OPENED BOX/ NO KEY/ PANEL ONLY/ NO BACK PLATE/ Siemens 547-005 is a Differential Pressure Monitor used in building HVAC applications to visually and audibly indicate room or duct pressure status, typically for spaces that must be kept positive or negative relative to adjacent areas. It is an APOGEE/TEC-family accessory that works with remote pressure transmitters to show differential pressure on a front-panel display and trigger alarms when setpoints are exceeded.? What the 547-005 is The 547-005 is a wall-mounted differential pressure monitor with a keyed two-position selector that allows selection between pressure modes (for example Positive/Neutral according to the spec sheet part listing). It is part of Siemens building technologies hardware, intended to supervise low air pressure differences in critical rooms such as labs, isolation rooms, or other controlled environments.? Key functions and features The monitor accepts input from remote differential pressure transmitters and provides through-the-wall differential pressure indication in units such as inches of water column or Pascals via a digital display. It includes visual status LEDs for normal vs alarm conditions and an audible alarm output, plus relay contacts that can be tied into building automation or monitoring systems when pressure goes out of range.? Typical applications Common uses include monitoring room pressure in healthcare isolation rooms, cleanrooms, laboratories, and other areas where pressure must remain positive or negative relative to surrounding spaces to control airflow and contamination. In Siemens APOGEE/TEC installations it can be integrated so that pressure status is supervised centrally, while still giving local staff a simple front-panel indication and alarm.? We are wholesaler/liquidators. We bought this in a lot of new items to resell. We are counting upon you to know what you are buying and if this item will suit your needs. No returns. Please only purchase this if you agree to those terms. *** PLEASE NOTE! Our store buys and sells a variety of new and used electronics, instruments, tools, antiques and many other items. We do our absolute best to thoroughly test all our merchandise and accurately describe and depict any flaw or defect we find. SHELF: FA-C SA