Setra Systems, Inc.

Tiago Braz Anes

Been-Chyuan Lin

Eric Christopher Beishline

Kevin Bourbeau

Anthony T Batista

Gino Amaro Pinto

Craig Robert Halloran

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 () 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.

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Framingham, MA, United States of America

Tiago Braz Anes