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Series 160FW Wireless Straight Pitot Tubes
Specications - Installation and Operating Instructions
Bulletin TE-160FW
Series 160FW Wireless Pitot Tubes are designed to meet the need of the
environmental eld testing and is an accurate and reliable way to measure the ow
of air or gas streams. Combined with the universal handheld and UHH gateway, the
160FW wireless capability allow users to read velocity directly on the handheld in the
Mobile Meter
®
App. This universal pitot tube can also be used to take duct traverses
when used with Dwyer’s TraverseIT
™
App. Data can be logged and sent via email for
later reporting.
For maximum accuracy of ±0.5%, as in laboratory applications, care is required and
the following recommendations should be followed.
1. Duct diameter should be 4˝ or larger.
2. Point total pressure opening upstream facing ow, and static pressure opening
downstream pointing in the direction of the ow. The faces of both openings must
be perpendicular to the airow.
3. Make an accurate traverse per drawings; calculate the velocities at each point and
average them.
4. Take readings in a smooth, straight duct section a minimum of 10-15 duct diameters
in length upstream and 5 diameters downstream from the pitot tube.
5. Provide an egg-crate type straightener upstream from the pitot tube for best
performance.
TAKING AIR VELOCITY READINGS
To measure air velocity with a Series 160FW Pitot Tube, make a 0.35˝ opening in
duct. Tubing is connected to the wireless manometer during manufacturing. In the
event tubbing becomes disconnected. Connect tubing from total pressure port or port
facing ow to high pressure side of manometer, and from static pressure port or port
facing perpendicular to ow to the low pressure side. If reading is negative, reverse
connections.
Manual Traverse
Make a series of readings traversing the duct in horizontal and vertical planes. Using
velocity pressures recorded at each location, calculate velocities and average them for
nal velocity value. See Figure 1 for more detail.
Quick Traverse
In the TraverseIT
™
app select the 160FW for the probe and follow the step by step
instructions in the app. Refer to the TraverseIT
™
app instruction manual for complete
details.
Figure 1: Traverse on Round and Square Duct Areas
MANUALLY CALCULATING VELOCITY
Air Velocity =
where:
P
v = Sensed pressure difference (velocity pressure) in inches of
water column
D = Air density in lbs./ft.
3
(dry air = .075)
C
p = Pitot tube coefcient: 0.81
Air Density = 1.325 X
PB = Barometric pressure in inches of mercury
T = Absolute Temperature (Indicated Temperature in °F plus 460)
Flow in cubic feet per minute equals duct cross sectional area in square feet x air
velocity in feet per minute.
With dry air at 29.9 inches of mercury, air velocity can be read directly from temperature
correction charts on reverse.
MAINTENANCE/REPAIR
Upon nal installation of the Model 160FW, no routine maintenance is required. The
Model 160FW is no eld serviceable and should be returned if repair is needed. Field
repair should not be attempted and may void warranty.
WARRANTY/RETURN
Refer to “Terms and Conditions of Sales” in our catalog and on our website. Contact
customer service to receive a Return Goods Authorization number before shipping the
product back for repair. Be sure to include a brief description of the problem, plus any
additional application notes.
SPECIFICATIONS
Wetted Material: 304 SS.
Accuracy: ±0.5% FS span @ 25°C (includes non linearity, hysteresis, and non
repeatability).
Pressure Limit: ±2 in w.c. (±500 Pa).
Compensated Temperature Limits: 32 to 140°F (0 to 60°C).
Pitot Tube Range: 0 to 9000 FPM (45 M/s).
Pitot Tube K-Factor: 0.81.
Process Temperature Limit: 1500°F (815°C).
Process Connections: 1/4˝ OD.
Weight: 2 lb (0.91 kg) (weight varies depending on pitot tube length).
Agency Approvals: RoHS.
1096.2 (Cp)
P
v
D
PB
T
When combined with Dwyer’s universal handheld or Android
device. The velocity is auto calculated and displayed in the Mobile
Meter
®
and TraverseIT
™
app.
NOTICE
EQUAL CONCENTRIC
A
REAS
R
D
CENTERS OF
AREAS
.316 R
.548 R
.707 R
.837 R
.949 R
A
B
16.64 EQUAL
RECTANGULAR
AREAS
CENTERS OF
AREAS
PITOT TUBE STATION INDICATED BY
Round Duct Rectangular Duct
®
Printed in U.S.A. 10/18 FR# 444490-00 Rev. 1©Copyright 2018 Dwyer Instruments, Inc.
GAGE READING WITH 160FW PITOT TUBE (VELOCITY PRESSURE) IN INCHES OF WATER
AIR VELOCITY IN FEET PER MINUTEAIR VELOCITY IN FEET PER MINUTE
GAGE READING WITH 160FW PITOT TUBE (VELOCITY PRESSURE) IN INCHES OF WATER
0 .01 .02 .03 .04 .05 .06 .07 .08 .09 .10.11 .12.13 .14.15 .16 .17.18 .1
9.
20
0
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GAGE READING WITH PITOT TUBE (VELOCITY PRESSURE) IN INCHES OF WATER
AIR VELOCITY IN FEET PER MINUTE
1400°F
1200°F
1000°F
800°F
600°F
400°F
300°F
200°F
100°F
70°F
40°F
0.2
.4
.6 .8 1.0 1.2 1.4 1.6 1.8 2.0 2.22.4 2.6 2.8 3.03.2 3.4 3.6 3.
84.0
0
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GAGE READING WITH PITOT TUBE (VELOCITY PRESSURE) IN INCHES OF WATER
AIR VELOCITY IN FEET PER MINUTE
1400°F
1200°F
1000°F
800°F
600°F
400°F
300°F
200°F
100°F
70°F
40°F
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
Phone: 219/879-8000
Fax: 219/872-9057
www.dwyer-inst.com
e-mail: [email protected]
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