Dwyer A-465 User Manual

A-465 Space Pressure Sensor

Installation and Operating Instructions

Bulletin A-27-MW

Finished
Installation of
the A-465

The A-465 Space Pressure Sensor provides a clean solution for
sensing space pressures. Typical applications include: sensing
the pressure in clean rooms, laboratories and building lobbies.
The kink resistant tubing provided is connected to tubing run­ning to a pressure transducer, Magnehelic
any other type of pressure sensing device.
The sensor can be mounted on sheetrock walls, single gang
electrical boxes or on ceiling tiles. The block free pressure ref­erence opening on the A-465 ensures accurate readings at all
times.

INSTALLATION
Wall Mounting

1. Select a suitable location complying with the gage manufac­turer's recommendations. The most common location for room
pressure measurement is on the wall next to the door inside the
room at the 5 ft. level. The wall depth must be at least 2 in. and
clear of any obstructions.
Another option is to mount the wall plate on the ceiling tile inside
the room.

Note: Always check for proper clearance before cutting any
holes.

®

Gage, VAV unit or

Parts List
A1 – Wall plate
A2 – Wall anchors
A3 – Anchor screws
A4 – Plastic tubing

4. Push the plastic tubing piece (A4) onto the reference fitting
and connect the tubing to the Magnehelic® Gage or other pres­sure sensing device.

5. Mount the wall plate to the wall or other flat surface using
screws (A3).

6. Verify the pressure measurement from the wall sensor is ac­curate to the actual pressure in the space (this assures there
aren’t any kinks or leaks in the tubing run).
Installation is now complete.

INSTALLATION DIAGRAM

A1

A2

A3

2. Using the wall plate (A1) as a guide, mark the wall for the
mounting anchors (A2) and the room reference fitting clearance.

3. Cut out the opening for the room reference fitting (usually a
1 in. hole works best) and drill the anchor holes with a 3/16 in.
drill. Install the wall anchors (A2).

©Copyright 2009 Dwyer Instruments, Inc. Printed in U.S.A. 3/09 FR# 443289-01 Rev. 3

DWYER INSTRUMENTS, INC.

Phone: [phone] www.dwyer-inst.com

A4

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