Page 1
INTRODUCTION
The Low Pressure Transmitter can be used to measure positive,
negative, or differential pressure in the ranges of 1"wc to 20"wc
and 250 Pa to 5000 Pa. The highly accurate piezoresistive
sensor is ideal for monitoring pressure of non-corrosive, non-
ionic working fluids such as clean dry air or other inert gases. It
features field selectable output signal types for the most flexible
application. Typical HVAC applications include monitoring of
filter differential pressure or cleanroom pressure. The output
signal is factory calibrated and temperature compensated for
highest start-up accuracy and trouble-free operation.
BEFORE INSTALLATION
Read these installation instructions carefully before
commissioning the Pressure Transmitter. Failure to follow
these instructions may result in product damage. Do not use
in an explosive or hazardous environment, with combustible
or flammable gases, as safety or emergency stop devices or in
any other application where failure of the product could result
in personal injury.
Use electrostatic discharge precautions during installation and do not exceed the
device ratings.
MOUNTING
The transmitter mounts on a vertical surface using the two integrated mounting holes. Ensure there is
enough space around the unit to connect the pressure tubing without kinking and to make the electrical
connections, avoid locations with severe vibrations or excessive moisture. Drill a hole in the duct and
insert so the probe point is facing into the air flow. The enclosure has a standard opening for a 1/2”
conduit and may be installed with either conduit and a conduit coupler or a cable gland type fitting. See
Figure 1.
The two mounting holes will facilitate a #10 size screw (not supplied). See Figure 1.
The enclosure has a hinged cover with a latch. Open the cover
by pulling slightly on the latch on the right side of the enclosure
and at the same time pulling on the cover, as illustrated in Figure
2.
A 1/2" NPT threaded connection hole is provided on the bottom
side of the enclosure. Screw the EMT connector or cable gland
connector in until tight. See Figure 3. It is recommended that
weatherproof conduit or cable gland fittings be used. The F style
enclosure includes 1/2" NPT to M16 thread adapter and cable
gland fitting. See Figure 3.
Make wiring connections as per "Wiring" illustrations on page 2.
Two security screws are provided which can be installed to
help secure the cover once settings and wiring connections are
complete. See Figure 4.
Figure 1
Figure 2
Figure 3
Figure 4
Thread adapter and
cable gland fitting
1/2" NPT Threaded Connection
IN-GE-ELPXXXXS-01-03 11/19
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Duct Low Pressure Transmitter
ELP-S - Installation Instructions
