Setra Systems, Inc.

Anthony T Batista

Eric Christopher Beishline

Kevin Bourbeau

Been-Chyuan Lin

Tiago Braz Anes

Dennis K Briefer

Gino Amaro Pinto

Sunil Barot

Paul Francis Grosshart

Bernard A Manning, Ii

Shawn Oscar Henry

Brandon Thomas Rogers

A room condition monitor (RCM) that includes a processor with an embedded router software object that is in signal communication with a first communication connector including BACnet/IP interface for the transmission receipt of data packages over a building management system (BMS) communication network according to a BACnet/IP protocol. The RCM also includes a room condition sensor for detecting a room condition. In addition, the RCM includes a projected capacitive LCD screen display to display information regarding the detected room condition, or other building information associated with the BMS. A second communication connector with a second network protocol interface is provided for communication with network legacy devises through the RCM router.

Room condition monitoring system

A surface mounted instrument () that is easily installed to seal () against a mounting surface () in spite of imprecise installation of a standard rough-in box () or irregularities in the surface. A cover plate () overlays the installed instrument housing () without the use of outwardly visible mechanical connectors by use of a pawl () that engages the housing. An oversized display () is mounted for easy replacement on a moveable display module () for unobstructed access to the interior () of the housing. Subsurface channels () formed in the housing are used to deliver a working fluid from a measured location to a sensor () inside the housing.

Surface mounted instrument

An environmental condition monitor () configured for simple upgrade from analog signal output to any of a plurality of digital communication protocols. A display board () includes the analog signal acquisition and processing elements of the device and also includes a pre-positioned but initially inoperative digital communication output connector (). A connector board () associated with the display board includes a connector () to which any one of a plurality of digital communication boards () may be selectively connected, depending upon which of a plurality of digital communication protocols is desired. Selective connection of a digital communication board completes a circuit whereby an analog output signal is converted to the desired digital output format and is then communicated back to the now-activated digital communication output connector ().

Environmental condition monitor for alternative communication protocols

An apparatus is disclosed for measuring the pressure of a liquid column enclosed within a pressurized tank or cell, and for deriving the height and/or density of the liquid column based on the measured pressure. The apparatus includes a first pressure sensor for differentially measuring the pressure within the cell relative to a reference pressure at a first height, and further includes a second pressure sensor for differentially measuring the pressure within the cell relative to a reference pressure at a second height. A feedback network is operative to match the reference pressure to the pressure within the cell at one of the first and second heights. The feedback network ensures that the sensor detecting the one region is maintained at a zero or null differential pressure condition, enabling the use of a small dynamic range sensor.

Apparatus using a feedback network to measure fluid pressures

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Ashby, MA, United States of America

Anthony T Batista