Setra Systems, Inc.

Setray Systems, Inc.

Setra System, Inc.

Gino Amaro Pinto

Dennis K Briefer

Eric Christopher Beishline

Kevin Bourbeau

Shih-Ying Lee

Been-Chyuan Lin

Anthony T Batista

Tiago Braz Anes

Kevin Vaughan

Sunil Barot

Thomas Foley

Michael J Amirto

Benjamin F Fontaine

Shawn Oscar Henry

Bernard A Manning, Ii

Paul Francis Grosshart

Brandon Thomas Rogers

Craig Robert Halloran

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 pressure sensor () useful as a vacuum manometer. A reference pressure cavity () of the sensor is evacuated through an evacuation opening () located behind a plate portion () of the sensor electrode () having a non-planar surface for supporting the diaphragm () during an overpressure event. The electrode is hermetically sealed to the body () of the sensor by a brazed joint with a ceramic seal member () disposed there between. The brazed joint may include a layer of buffer material () which provides a degree of malleability to the joint to avoid cracking of the ceramic seal member. The brazed ceramic/metal joint permits the selection of materials such that differential thermal expansion effects can be passively minimized. The electrode is connected to the sensor circuitry () by a wire having a spring section (), thereby providing a stress free interconnection.

Pressure measuring instrument

An apparatus () for sensing a condition, such as humidity, through an opening () in a surface () such as a duct or wall. A housing () includes an outer section () mounted on the surface and a probe section () extending into the duct or wall. A circuit board assembly () is mounted within the housing and includes a user interface section () within the housing outer section and a sensor section () rigidly connected to the user interface section and extending into the housing probe section. The sensor section may be integrated into the circuit board assembly by a rigid connector () allowing easy removal and field replacement of the sensor section. A sealing device () isolates the housing outer section from the air within the duct or wall. A flexible grounding connection () provides electrical grounding of the circuit board assembly and a degree of mechanical support.

Humidity sensing apparatus

A capacitive pressure sensor for measuring a pressure applied to an elastic member includes a capacitive plate disposed adjacent to the elastic member so as to define a gap between a planar conductive surface of the elastic member and a corresponding planar surface of the capacitive plate. The gap, capacitive plate and elastic member together define a capacitor having a characteristic capacitance. The sensor further includes an elongated electrical conductor characterized by an associated inductance value. The conductor is fixedly attached to and electrically coupled with the capacitive plate. The gap between the capacitive plate and the elastic member varies as a predetermined function of the pressure applied to the elastic member so as to vary the characteristic capacitance. The capacitor and the electrical conductor together form an electrical resonator having a characteristic resonant frequency. Varying the capacitance of this tank circuit varies the resonant frequency of the tank circuit. Thus, the resonant frequency of the tank circuit is indicative of the pressure applied to the elastic member. The close physical proximity of the capacitor and the electrical conductor equalizes the effects of environmental influences such as temperature variations, vibration and shock, thus making such effects more predictable.

Capacitive pressure sensor having encapsulated resonating components

A capacitive sensor includes an elastic member extending about a central axis, having a central region, a peripheral region, a first side, and a second side. An overpressure stop member has an inner surface and an outer surface. The inner surface of the overpressure stop member has a contour adapted to limit deflection of the elastic member caused by a differential pressure between the two regions across the elastic member. The outer surface of the overpressure stop member has an first electrically conductive region. A second plate is spaced apart from the outer surface of the overpressure stop member, and being connected to the central region of the elastic member by a post, wherein the post transfers deformation of the elastic member caused by differential pressure across the elastic member to movement of the second plate along the central axis. The second plate has a second electrically conductive region opposite the first electrically conductive region, wherein the first electrically conductive region and the second electrically conductive region form a capacitor.

Center-mount capacitive sensor with overload protection

A capacitive pressure sensor includes a housing element, a first electrode assembly and a second electrode assembly. The first electrode assembly includes a deformable elastic member, and a plurality of petal electrodes. The petal electrodes are attached to the elastic member and extend from the elastic member in a direction which is substantially perpendicular to the surface of the elastic member. The elastic member of the first electrode assembly is secured at its perimeter to the housing element at an aperture in the housing, so that the petal electrodes are enclosed within the housing. The second electrode assembly is also enclosed within the housing and is surrounded by the elongated electrodes. The spatial relationship between the petal electrodes and the second electrode assembly is directly related to the capacitance measured between them. As pressure is applied to the outer surface of the elastic member, the elastic member deflects and causes the spatial relationship between the petal electrodes and the second electrode to change, which causes the capacitance measured between them to change.

Capacitive pressure sensor having petal electrodes

A differential pressure transducer includes a pair of interior chambers separated by a peripherally supported, nominally planar electrically conductive diaphragm. A magnetic assembly is positioned on at least one chamber wall opposite to a central portion of the diaphragm. The magnetic assembly includes an electrical conductor and preferably a magnetic field permeable electric field shield between the electrical conductor and the chamber so that as the central portion of diaphragm is displaced from its nominal plane in response to an applied pressure differential, the inductance of the magnetic assembly changes. The transducer may be a portion of a tank circuit of an oscillator having a frequency of oscillation that varies with the pressure differential applied across the diaphragm.

Magnetic position sensor with magnetic field shield diaphragm

A differential pressure transducer includes a pair of interior chambers separated by a peripherally supported, nominally planar electrically conductive diaphragm. A magnetic assembly is positioned on at least one chamber wall opposite to a central portion of the diaphragm. The magnetic assembly includes an electrical conductor and preferably a magnetic field permeable electric field shield between the electrical conductor and the chamber so that as the central portion of diaphragm is displaced from its nominal plane in response to an applied pressure differential, the inductance of the magnetic assembly changes the transducer may be a portion of a tank circuit of an oscillator having a frequency of oscillation that varies with the pressure differential applied across the diaphragm.

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Milford, MA, United States of America

Gino Amaro Pinto