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Motorola Sensor Device Data
For More Information On This Product,
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Prepared by: Brian Pickard
Sensor Products Division
Semiconductor Products Sector
INTRODUCTION
Motorola offers a wide variety of ported, pressure sensing
devices which incorporate a hose barb and mounting tabs.
They were designed to give the widest range of design
flexibility. The hose barbs are 1/8
″
 (
≈
3 mm) diameter and the
tabs have #6 mounting holes. These sizes are very common
and should make installation relatively simple. More
importantly, and often overlooked, are the techniques used in
mounting and adapting the ported pressure sensors. This
application note provides some recommendations on types of
fasteners for mounting, how to use them with Motorola
sensors, and identifies some suppliers. This document also
recommends a variety of hoses, hose clamps, and their
respective suppliers.
This information applies to all Motorola MPX pressure
sensors with ported packages, which includes the packages
shown in Figure 1.
Single Side Port
Differential Port
Axial Port
Stovepipe Port
Figure 1. MPX Pressure Sensors with
Ported Packages
A review of recommended mounting hardware, mounting
torque, hose applications, and hose clamps is also provided
for reference.
MOUNTING HARDWARE
Mounting hardware is an integral part of package design.
Different applications will call for different types of hardware.
When choosing mounting hardware, there are three important
factors:
 permanent versus removable
 application
 cost
The purpose of mounting hardware is not only to secure the
sensor in place, but also to remove the stresses from the
sensor leads. In addition, these stresses can be high if the
hose is not properly secured to the sensor port. Screws, rivets,
push–pins, and clips are a few types of hardware that can be
used. Refer to Figure 2.
Push–Pin
Rivet
Screw
Figure 2. Mounting Hardware
SEMICONDUCTOR APPLICATION NOTE
REV 1
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Freescale Semiconductor, Inc.
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