Technical Note
Pneumatic Interface Recommendations for Honeywell
Basic Board Mount Pressure Sensors:
TBP Series, Compensated/Unamplified
NBP Series, Uncompensated/Unamplified
Sensing and Control
1.0 INTRODUCTION
There are three methods to pneumatically connect Honeywell’s
Basic Board Mount Pressure Sensors: TBP and NBP Series, to
the end user’s system, depending on the porting selected for the
sensor (see Figure 1). These methods include tubing, O-rings,
and clamping.
Figure 1. TBP and NBP Series Pressure Ports
2.0 Tubing
Tubing is a common method of pneumatically connecting to the
sensors, and, depending on the working pressure range and
operating temperature, the corresponding type of tubing can be
selected (i.e., Superthane®, silicone, and vinyl).
Silicone tubing, for instance, tends to be the easiest to connect to
but its working pressure is not as high as the other materials.
The lower the shore for the tubing, the easier it is to insert the
tubing onto the sensor’s port. However, the lower shore tubing
also has lower working pressures. For working pressures of 20
psi and below, silicone or vinyl tubing tends to be used; for pres-
sures above 20 psi, Superthane® or low-density polyethylene
tubing can be considered.
The tubing used needs to be matched to the application to pro-
vide the required operating temperature range and working pres-
sure. Table 1 shows some recommended tubing for Honeywell’s
Basic Board Mount Pressure Sensor, “A” port (Figure 1).
Table 1. Recommended Tubing for Honeywell Basic Board
Mount Pressure Sensors
Manufac-
turer
Type Part
Number
ID
(in)
OD
(in)
Pressure
at 25 °C
(psi)
Frelin-
Wade
Free-Thane
(polyure-
thane
1A-156-11 0.093 0.156 100
Frelin-
Wade
nylon 1A-200-01 0.093 0.125 270
NewAge
Industries
PVC 1100225 0.094 0.156 42
NewAge
Industries
silicone 28003150 0.094 0.156 20
NOTICE
A technique sometimes used to apply a more rigid tubing-to-
port connection is to use a low power heat gun to slightly heat
the tubing. Once cooled, the tubing tends to grip the port better.
008260-3-EN
September 2013
Copyright © 2013 Honeywell International Inc. All Rights Reserved.
DIP Leadless SMT
AN
SMT
LN
PN
Single axial
barbless port
Low-profile
port
Single axial
barbed port
AN
LN
PN
Single axial
barbless port
Low-profile
port
Single axial
barbed port
AN
LN
PN
Single axial
barbless port
Low-profile
port
Single axial
barbed port
008246-2-EN
February 2014
Copyright © 2014 Honeywell International Inc. All rights reserved.
Sensing and Control
Honeywell
1985 Douglas Drive North
Golden Valley, MN 55422
honeywell.com
Technical Note
Pneumatic Interface Recommendations for Honeywell
Basic Board Mount Pressure Sensors:
TBP Series, Compensated/Unamplified
NBP Series, Uncompensated/Unamplified
Warranty. Honeywell warrants goods of its manufacture as being free of defective materials and faulty workmanship.
Honeywell’s standard product warranty applies unless agreed to otherwise by Honeywell in writing; please refer to your order
acknowledgement or consult your local sales office for specific warranty details. If warranted goods are returned to Honeywell
during the period of coverage, Honeywell will repair or replace, at its option, without charge those items it finds defective. The
foregoing is buyer’s sole remedy and is in lieu of all warranties, expressed or implied, including those of merchantability
and tness for a particular purpose. In no event shall Honeywell be liable for consequential, special, or indirect damages.
While we provide application assistance personally, through our literature and the Honeywell web site, it is up to the customer to
determine the suitability of the product in the application.
Specifications may change without notice. The information we supply is believed to be accurate and reliable as of this printing.
However, we assume no responsibility for its use.
Find out more
To learn more about Honeywell’s
sensing and control products,
call 1-800-537-6945, visit
sensing.honeywell.com, or e-mail
inquiries to info.sc@honeywell.com
NOTICE
A small drop of epoxy can be either applied to the port prior to
the tubing being placed onto the port or applied at the end of
the tubing once the tubing is in place instead of a clamp. This
holds the tubing in place and can further act as a sealing agent
to help ensure a leak-tight connection between the port and
tubing. A room temperature sealant is generally used for this
purpose. Ensure that the epoxy doesn’t block the hole in the
port as it needs to remain open.
3.0 O-RINGS
O-rings may also be used to connect pneumatically to the sensor.
This method is generally for devices using the “LN” or “PN” port
options (Figure 1).
• “PN” A 70 Shore 2-006 O-ring is the recommended O-ring size
used to connect to the “PN” port.
• Most O-ring manufacturers recommend a compression of 20%
to 25% to provide the proper O-ring compression over the
temperature range.
• For the “PN” option, a 5-583 size O-ring 70 shore is
recommended. This O-ring ts around the diameter of the
sensor body.
• Silicone or uorosilicone O-rings are commonly used as they
tend to take less of a set over temperature verses other O-ring
materials.
4.0 CLAMPING
Generally, when the working pressure is 15 psi or less, clamps
are typically not required. As each application is different, the
end use must be taken into account before determining whether
clamps are necessary to ensure that the tubing remains in place
and doesn’t leak. Such considerations include vibration, pressure
spikes, and the tubing being used. A common method of clamp-
ing is to use a plastic cable tie such as can be found in most
hardware stores. Ties are available in a variety of sizes. They are
relatively easy to install and stay in place over time.