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Series DS Flow Sensors |
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 The
Dwyer flow sensor is an averaging pitot tube providing accurate
and convenient flow rate sensing. When purchased with a Dwyer
Capsuhelic® differential pressure gage of appropriate range,
the result is a flow indicating system delivered off the shelf
at an economical price.
Pitot tubes have been used in flow measurement for years. Conventional pitot
tubes sense velocity pressure at only one point in the flowing stream. Therefore,
a series of measurements must be taken across the stream to obtain a meaningful
average flow rate. The Dwyer flow sensor eliminates the need for traversing the
flowing stream because of its multiple sensing points and built-in averaging
capability.
Dwyer Series DS-300 flow sensors are designed to be inserted in
the pipeline through a compression fitting. They are furnished
with instrument shut-off valves
on both pressure connections. Valves are fitted with 1/8" NPT female connections.
Accessories include adapters with ¼" SAE 45° flared ends compatible with
hoses supplied with the Model A-471 Portable Capsuhelic kit. Standard valves
are rated at 200 psig (13.7 bar) and 200°F (93.3°C). Where valves are not required,
they can be omitted at reduced cost. Series DS-300 flow sensors are available
for pipe sizes from 1" to 10". If replacing a DS-200 flow sensor or
using a A-160 thredolet with a DS-300, an optional ¼" X 3/8" bushing,
P/N A-161 is required.
DS-200 models are also available in ten insertion lengths from
1" - 10". Operation is similar to DS-300 units. Basic
differences are the multi-turn shut-off valves, 3/8" NPT
mounting and installed ¼" SAE 45° flared pressure connections.
DS-400 Averaging Flow Sensors are quality constructed
from extra strong 3/4" dia.
stainless steel to resist increased forces encountered at higher flow rates
with both air and water. This extra strength also allows them to be made in
linger insertion lengths up to 24 inches (61 cm). All models include convenient
and quick-acting quarter-turn ball valves to isolate the sensor for zeroing.
Process connections to the valve assembly are 1/8" NPT female. A pair
of 1/8" NPT x ¼" SAE 45° flared adapters are included, compatible
with hoses used in the Model A-471 Portable Capsuhelic® Gage Kit. Supplied
solid
brass mounting adapter has a 3/4" dia. compression fitting to lock in
required insertion length and a 3/4" NPT male thread for mounting
in a thread-o-let (not included).
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| How to Order |
| Merely determine
the pipe size into which the flow sensor will be mounted and designate
the size aas a sufix to Model DS-300.
For example, a flow sensor to
be mounted in a 2" pipe would be a Model No. DS-300-2". |
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| Select
model with suffix which matches pipe size |
DS-200-1"
DS-200-1 ¼"
DS-200-1 ½"
DS-200-2"
DS-200-2 ½"
DS-200-3"
DS-200-4"
DS-200-6"
DS-200-8"
DS-200-10" |
DS-300-1"
DS-300-1 ¼"
DS-300-1 ½"
DS-300-2"
DS-300-2 ½"
DS-300-3"
DS-300-4"
DS-300-6"
DS-300-8"
DS-300-10" |
DS-400-6"
DS-400-8"
DS-400-10"
DS-400-12"
DS-400-14"
DS-400-16"
DS-400-18"
DS-400-20"
DS-400-24" |
OPTIONS AND ACCESSORIES:
A-160 Threadolet - 3/8" NPT, forged steel,
3000 psi
A-161 Brass Bushing - ¼" x 3/8"
Less Valves (DS-300) - To order, add
suffix -LV; Example: DS-300-2"-LV
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Model
DS-300 For non-critical water and air
flow monitoring applications, the chart below can be utilized
for ordering a stock Capsuhelic differential pressure gage
for use with the DS-300 flow sensor. Simply locate the maximum
flow rate for the media being measured under the appropriate
pipe size and read the Capsuhelic® gage range in inches of
water column to the left. The DS-300 sensor is supplies with
installation and operation instructions, Bulletin F-50. It
also includes complete flow conversion information for the
three media conditions shown in the chart below. This information
enables the user to create a complete differential pressure
to flow rate conversation table for the sensor and differential
pressure gage employed. Both the Dwyer Capsuhelic® gage and
flow sensor feature excellent repeatability so, once the
desired flow rate is determined, deviation from that flow
in quantitative measure can be easily determined. You may
wish to order the adjustable signal flag option for the Capsuhelic® gage
to provide an easily identified reference point or the proper
flow.
Model DS-400
Capsuhelic® gages with special ranges and/or direct
reading scales in appropriate flow units are available on special
order for more critical applications. Customer
supplied data for the full scale flow (quantity and units) is required along
with the differential pressure reading at that full flow figure. Prior to ordering
a special Capsuhelic® differential pressure gage for flow read0out, we recommend
you request Bulletin F-50 to obtain complete data on converting flow rates of
various media to the sensor differential pressure output. With this bulletin
and after making a few simple calculations, the exact range gage required can
easily be determined. |
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GAGE
RANGE
(IN. W.C.)
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MEDIA
@ 70°F
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FULL
RANGE FLOWS BY PIPE SIZE (APPROXIMATE) |
1
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1
.25
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1.5
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2
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2.25
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3
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4
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6
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8
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10 |
2
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Water
(GPM)
Air @ 14.7 PSIA (SCFM)
Air @ 100 PSIG (SCFM)
|
4.8
19.0
50.0
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8.3
33.0
90.5
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11.5
42.0
120.0
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20.5
65.0
210.0
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30
113
325
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49
183
510
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86
330
920
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205
760
2050
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350
1340
3600
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560
2130
6000
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5
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Water
(GPM)
Air @ 14.7 PSIA (SCFM)
Air @ 100 PSIG (SCFM)
|
7.7
30.0
83.0
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14.0
51.0
142.0
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18.0
66.0
190.0
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34.0
118.0
340.0
|
47
178
610
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78
289
820
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138
510
1600
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320
1200
3300
|
560
2150
5700
|
890
3400
10000
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10
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Water
(GPM)
Air @ 14.7 PSIA (SCFM)
Air @ 100 PSIG (SCFM)
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11.0
41.0
120.0
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19.0
72.0
205.0
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25.5
93.0
275.0
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45.5
163.0
470.0
|
67
250
740
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110
410
1100
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195
725
2000
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450
1690
4600
|
800
3040
8100
|
1260
4860
15000
|
25
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Water
(GPM)
Air @ 14.7 PSIA (SCFM)
Air @ 100 PSIG (SCFM)
|
18.0
63.0
185.0
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32.0
112.0
325.0
|
40.5
155.0
430.0
|
72.0
255.0
760.0
|
108
390
1200
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173
640
1800
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310
1130
3300
|
720
2630
7200
|
1250
4860
13000
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2000
7700
22000
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50
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Water
(GPM)
Air @ 14.7 PSIA (SCFM)
Air @ 100 PSIG (SCFM)
|
25.0
90.0
260.0
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44.0
161.0
460.0
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57.5
205.0
620.0
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100.0
360.0
`050.0
|
152
560
1700
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247
900
2600
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435
1600
4600
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1000
3700
10000
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1800
6400
18500
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100
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Water
(GPM)
Air @ 14.7 PSIA (SCFM)
Air @ 100 PSIG (SCFM)
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36.5
135.0
370.0
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62.0
230.0
660.0
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82.0
300.0
870.0
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142.0
505.0
1500.0
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220
800
2300
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350
1290
3600
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620
2290
6500
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1500
5000
15000
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| Model A-471 Portable Kit |
 CAPSUHELIC
GAGE SHOWN INSTALLED
IN A A-471 PORTABLE KIT
The Dwyer Series
4000 Capsuhelic® differential pressure gage is ideally
suited for use as a read-out device with the DS-300
Flow Sensors. The gage may be used on system pressures
of up to 500 PSIG even when the flow sensor differential
pressure to be read is less than 0.5" w.c. With
accuracy of ±3% of full scale, the Capsuhelic® gage
can be used in ambient temperatures from 32°F to 200°F.
Zero and range adjustments are made from outside the
gage. The standard gage with a die cast aluminum housing
can be used with the flow sensor for air or oil applications.
For water flow measurements, the optional forged brass
housing should be specified. The Capsuhelic gage may
be panel or surface mounted and permanently plumbed
to the flow sensor if desired. The optional A-610 pipe
mounting bracket allows the gage to be easily attached
to any 1 ¼" - 2" horizontal or vertical pipe.
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| For portable
operation, the A-471 Capsuhelic Portable Gage Kit is available
complete with tough polypropylene carrying case, mounting bracket,
3-way manifold valve, two 10' high pressure hoses, and all necessary
fittings. |
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