Rain Bird FS200B User manual

Table of contents
Introduction ........................................................... p. 1
Sensor Types and Size Selection........................ p. 1
Mechanical Installation......................................... p. 3
Electrical Installation ............................................ p. 5
Calibration ............................................................. p. 6
Impeller Assembly and Shaft Replacement ....... p. 7
Troubleshooting.................................................... p. 9
Specifications........................................................ p. 11
Introduction
Used in conjunction with flow monitors or transmitters, Rain Bird non-magnetic flow sensors manufactured by Data
Industrial provide accurate readings of the rate of liquid flow as well as total accumulated flow. A number of
sensor models are offered, which cover applications for a wide range of pipe sizes.
The flow sensors generate a frequency which is proportional to flow rate. An internal preamplifier allows the pulse
signal to travel up to 3000 feet without further amplification. Power to operate the sensor is provided by the flow
transmitter. The impeller, shaft, O-rings, and impeller bearings are replaceable in the field.
Data Industrialflow sensors feature a closed, six-bladed impeller design, using a proprietary, non- magnetic
sensing technology. The forward-swept impeller shape provides higher, more constant torque than other
impeller designs, and is less prone to fouling by water-borne debris. The forward-curved shape, coupled with the
absence of magnetic drag, provides improved operation and repeatability, even at lower flow rates. As the liquid
flow turns the impeller, a low impedance digital signal is transmitted with a frequency proportional to the flow rate.
Sensors of similar type are interchangeable, so there is no need for recalibration after servicing or replacement.
Sensor Types and Size Selection
Rain Bird provides several basic sensor configurations using the same impeller element. This allows for a wide
range of applications and pipe sizes. Sensors are supplied with two single conductor 18 AWG stranded copper
wire leads 48 inches in length with U.L. Style 1056 direct burial insulation. These sensors may be used in below
grade applications in meter pits of valve boxes. All sensor electrical components are self-contained. Pressure and
temperature ratings for the various models are contained in the Specifications section of this manual. These
models are further described one the following pages.
Owner's Manual
for Flow Sensors
by Data Industrial

Rain Bird Flow Sensors
Manual
2
Brass Insert Sensor (FS350B)
This Insert style sensor has a 5 1/4” long sleeve length, and uses brass and bronze hardware. It is used in all pipe
sizes from 3” to 40.0” in diameter. A bronze 2” NPT externally threaded hex adapter is provided. The adapter may
be mounted to the pipe using a welded-on threaded fitting such as a Thredolet®or pipe saddle.
Stainless Steel Insert Sensor (FS350SS)
This is the same as a Brass Insert Sensor, except that the sensor, sleeve and hex adapter are made of 300 Series
stainless steel.
PVC Tee Sensors
These models feature a modified PVC tee with solvent weld socket end connections, and a removable PPS sensor
insert. They are available in the following sizes and thread types:
Model (thread)
Model (thread)
Size
FS400P (slip)
IFS400PFL (DIN flanged)
4” (110mm)
FS300P (slip)
IFS300BPS (BSP)
3” (75mm)
FS200P (slip)
IFS200BPS (BSP)
2” (50mm)
FS150P (slip)
IFS150BPS (BSP)
1 1/2” (40mm)
FS100P (slip)
IFS100BPS (BSP)
1” (25mm)
FS075P (slip)
IFS075BPS (BSP)
3/4” (20mm)
FS050P (slip)
IFS050BPS (BSP)
1/2” (12mm)
BSP = Female BPS straight threaded ends
Bronze Tee Sensor
These models combine a PPS electronics package inserted into a proprietary cast bronze pipe tee with threaded
NPT (female iron pipe thread - FIPT) connections. They are available in the following sizes and thread types:
Model
Thread
Size
FS200B
NPT
2” (50mm)
FS150B
NPT
1 ½” (40mm)
FS100B
NPT
1” (25mm)
Flanged Irrigation PPS Insert Assembly (Model FSTINSERT).
This is a flow sensor insert for use with tee style fittings for larger pipe diameters.
Suggested Operating Range for Tee Selection
Model
Description
Operating Range
GPM
LPM
m3/hr
Brass Tees
FS200B
2" Brass Tee Flow sensor
10 to 100
38 to 380
2.3 to 23
FS150B
1 1/2" Brass Tee Flow sensor
4 to 80
15 to 300
1 to 18
FS100B
1" Brass Tee Flow sensor
2 to 40
7.6 to 150
0.5 to 9
Plastic Tees
FS400P
4" PVC Tee Flow Sensor
40 to 500
150 to 1900
9 to 110
FS300P
3" PVC Tee Flow Sensor
20 to 300
75 to 1130
4.5 to 70
FS200P
2" PVC Tee Flow Sensor
10 to 200
40 to 750
2.3 to 45
FS150P
1 ½" PVC Tee Flow Sensor
5 to 100
19 to 380
1.1 to 23
FS100P
1" PVC Tee Flow Sensor
5.4 to 54
20 to 200
1.2 to 12
FS075P
3/4" PVC Tee Flow Sensor
3.3 to 33
13 to 125
.75 to 7.5
FS050P
1/2" PVC Tee Flow Sensor
1.9 to 19
7 to 70
.43 to 4.3
Inserts
FS350B
Brass Insert Flow Sensor
Depends on Pipe Type and Size.
See pages 6 through 8.
FS350SS
Stainless Steel Insert Flow Sensor
Values for plastic tees apply for BSP and slip threads.

Rain Bird Flow Sensors
Manual
3
Mechanical Installation
General
The accuracy of flow measurement for all flow measuring devices is highly dependent on proper location of the
sensor in the piping system. Irregular flow velocity profiles caused by valves, fittings, pipe bends, etc. can lead
to inaccurate overall flow rate indications even though local flow velocity measurement may be accurate. A
sensor located in the pipe where it can be affected by air bubbles, floating debris, or sediment may not achieve
full accuracy and could be damaged. Rain Bird flow sensors are designed to operate reliably under adverse
conditions, but the following recommendations should be followed to ensure maximum system accuracy:
1) Choose a location along the pipe where 10 pipe diameters upstream and 5 pipe diameters downstream of the
sensor provide no flow disturbance. Pipe bends, valves, other fittings, pipe enlargements and reductions
should not be present in this length of pipe.
2) The preferred location around the circumference of a horizontal pipe is on top. If trapped air or debris will
interfere, then the sensor should be located further around the pipe from the top but not more than 45
degrees from top dead center. The sensor should never be located at the bottom of the pipe, as sediment
may collect there. Locations off top dead center cause the impeller friction to increase, which may affect
performance at low flow rates. Any circumferential location is correct for installation in vertical pipes.
3) Small pipe PVC and Bronze Tee Type sensors are Factory Set, but for insert sensors the Insertion depth
should be set to 1 1/2" for accurate flow readings. The following pages show methods for ensuring correct
insertion depth for various sensor mounting configurations.
4) Alignment of the sensor to ensure that impeller rotation is parallel to flow is important. Alignment instructions
are also included on the following pages.
Mechanical Installation for PVC Tee Sensors
1) Note intended direction of flow as indicated by arrows on the tee. There must be free, unrestricted pipe for at
least 10 diameters upstream and 5 diameters downstream of the tee.
2) Remove the clevis pin and remove the sensor from the tee.
3) Properly clean the pipe ends and tee sockets.
4) Solvent cement the pipe to the tee.
5) Reinstall sensor in tee as follows:
a) Align the flow arrow on the top of the sensor housing in the direction of flow.
b) Carefully press sensor straight into tee.
c) Lead the sensor cable through the conduit cap, if so equipped. The cap will fit standard 1/2” conduit
fittings.
d) Install clevis pin through tee, sensor, and conduit cap, and install cotter ring.
Mechanical Installation for Bronze Tee Sensor
Install with flow label pointing in the direction of flow (downstream).
To install the sensor tee
1) Note intended direction of flow as indicated by arrows on the cast bronze tee. There must be free,
unrestricted pipe for at least 10 diameters upstream and 5 diameters downstream of the tee.
2) Apply pipe compound over the first 3 or 4 threads of the mating pipe.
3) Thread the pipe into the sensor tee until hand tight.
4) Tighten the pipe, using a wrench, an additional 1 1/2 turns.

Rain Bird Flow Sensors
Manual
4
To install sensor in tee
1) Apply a small amount of silicone grease to O-rings on sensor insert and chamfer on inside lip of tee. Clean
off any grease which could be deposited on the impeller.
2) Align flow arrow on sensor with direction of flow.
3) Carefully press sensor straight into tee. Caution: Impeller may strike sides of venturi cavity in tee if
misaligned, causing damage to impeller or shaft.
4) Install clevis pin through the tee, sensor, and conduit cap, and install split ring.
5) Before pressurizing pipe, verify that:
•All threaded connections are tight.
•The flow direction arrows on the tee and sensor are aligned with the flow direction.
•The clevis pin and cotter ring are installed.
Mechanical Installation for Insert Sensors
The insertion depth and alignment of the sensor assembly are critical to the accuracy of the flow measurement.
The Flat End of the sensor tube assembly MUST BE INSTALLED 1-1/2" from the inside wall of the pipe. In order
to allow for variations in wall thickness, lining or coatings, the depth adjustment is controlled by the position of
the Hex Nuts on the three (3) threaded studs of the Hex Mounting Adapter. The Hex Mounting Adapter is
provided with a 2" Male NPT connection.
There are two methods of mounting these Rain Bird sensors in a 3” or larger pipe. One for PVC pipe uses a 2”
NPT threaded pipe saddle. The other, for steel pipe, uses a welded-on fitting such as a Thredolet®, also tapped
for a 2” NPT connection. In either case, cut a 2” hole through a depressurized pipe and then secure the saddle
or welded fitting to the pipe. Note: Do not use a threaded outlet tee, the inside dimension of the tee is not
the same as the pipe O.D. Install the 2” NPT adapter provided, using a thread sealant to prevent leakage.
Tighten as necessary. Rain Bird insert style sensors are calibrated with the sensor inserted 1 1/2” into the pipe
flow.
To determine the proper insertion depth, proceed as follows:
1) Apply Anti-Seize thread lubricant, supplied with the sensor, to the threaded studs of the mounting
adaptor.
2) Determine the height to the upper adjusting nuts on the three 1/4” studs using the insertion depth gauge
contained in the RBIK Installation Kit. Set them at 3 3/4" above the inside wall of the pipe.
3) Clean O-Rings and flow sensor sleeve, and lightly lubricate O-Rings with silicone grease from the packet
provided or some other acceptable lubricant. Take care not to get grease on the impeller or bearing.
4) Insert the flow sensor into the 2” NPT adapter so that the mounting holes in the positioning collar fit over the
studs on the adapter. Lower the sensor onto the previously adjusted nuts. Install the lock nuts on top of the
positioning collar and tighten. Now tighten the lower jam
nuts firmly against the upper adjusting nuts to secure
them for future removal of the sensor for inspection or
service.
Alignment of Flow Sensor
1) Loosen positioning collar set screws with a 3/32” Allen
wrench. Place the alignment rod through the sight holes
in the flow sensor. Refer to Figure 2. Using the
alignment rod as a guide, align the flow sensor so that
the flow label arrow matches pipe flow direction and so
that the alignment rod is exactly parallel to the pipe.
This procedure aligns the impeller directly into the fluid
flow.
As a backup to the flow arrow label, there is a small hole
next to the larger sighting hole of the upstream side.
Figure 1
Installation of FS350B and FS350SS
3 ¾”

Rain Bird Flow Sensors
Manual
5
SET SCREW
ALIGNMENT ROD
ALIGNMENT ROD
C
C
2) With a 3/32” Allen wrench, tighten positioning collar set screws. Double check that the sighting holes in the
sleeve are parallel down the pipe and that the flow arrow label matches pipe liquid flow direction.
3) Cable routing: The positioning collar is threaded for connection of a standard 1/2” electrical conduit (flex
cable) or a wire strain relief. Route cable as required. Be sure to leave enough flex in cable or conduit to
allow future removal of sensor for service or cleaning if necessary.
Figure 2 –Alignment of FS350B and FS350SS
Electrical Installation
The sensor leads are supplied with watertight caps over the ends.
1) DO NOT remove the plastic caps from the sensor leads until ready
2) Use PE-39 #19 AWG cable, which is suitable for direct burial and clean data transmission, to connect the
sensor to the transmitter, monitor, or controller.
3) Make a water tight splice. Direct burial silicone grease splices are recommended (Rain Bird DBRY20 or 3M
DBR/Y-6). Two part epoxy type waterproof kits are also acceptable (be sure the epoxy seals the ends of
the cables).
4) For silicone grease splices, make sure the wire nut is installed as deep as possible into the grease tube.
For epoxy type, make sure the epoxy is hardened before inverting the splice or dropping it in standing
water.
5) DO NOT make an underground splice unless absolutely necessary.
6) Route the cable from the sensor to a Rain Bird flow monitor/transmitter. The cable may be extended up to
2000 feet by using PE-39 #19 AWG cable, which is shielded. Be sure to leave sufficient slack in the cable
to allow for future service of sensor.
7) When connecting to a Rain Bird flow monitor/transmitter, locate the section of terminal strip on the monitor
labeled “SENSOR INPUT” or “SENSOR”. Connect the red wire to RED(+) terminal and the black wire to
BLACK(-).

Rain Bird Flow Sensors
Manual
6
Calibration
Rain Bird sensors use unique K and offset numbers for calibration. These numbers are derived from
calibration runs using NIST traceable instruments. Using both a K and an offset number provides higher
accuracy than using a K factor alone. K and offset numbers for each tee configuration are listed in the
following tables.
Calibration Tables
The table on pages 7 and 8 provides calibration and operation data for most scheduled pipe sizes from 3”
through 36”. For tee-mounted sensors, see the table below.
Calibration Table for Tee Mounted Sensors
K Value, Offset and Suggested Operating Range
Model
Description
K Value
Offset
Operating Range
GPM
LPM
m3/hr
Brass Tees
FS200B
2" Brass Tee Flow sensor
2.7470
0.0000
10 to 100
38 to 380
2.3 to 23
FS150B
1 1/2" Brass Tee Flow sensor
1.0653
0.0892
4 to 80
15 to 300
1 to 18
FS100B
1" Brass Tee Flow sensor
0.3974
0.2618
2 to 40
7.6 to 150
0.5 to 9
Plastic Tees
FS400P
4" PVC Tee Flow Sensor
13.7424
0.2307
40 to 500
150 to 1900
9 to 110
FS300P
3" PVC Tee Flow Sensor
8.3090
0.2270
20 to 300
75 to 1130
4.5 to 70
FS200P
2" PVC Tee Flow Sensor
2.8429
0.1435
10 to 200
40 to 750
2.3 to 45
FS150P
1 ½" PVC Tee Flow Sensor
1.6970
-0.3160
5 to 100
19 to 380
1.1 to 23
FS100P
1" PVC Tee Flow Sensor
0.2611
1.2000
5.4 to 54
20 to 200
1.2 to 12
FS075P
3/4" PVC Tee Flow Sensor
0.1563
0.9000
3.3 to 33
13 to 125
.75 to 7.5
FS050P
1/2" PVC Tee Flow Sensor
0.0780
0.9000
1.9 to 19
7 to 70
.43 to 4.3
Description of Column Information for Pipe Sizes 3” through 36”
Column 1 Nominal Pipe Size
Column 2 Pipe O.D. as defined by ASA B36.10 and other standards
Column 3 Pipe I.D. as defined by ASA B36.10 and other standards
Columns 4 and 5 The K value and Offset that should be used in our frequency equation:
Freq = GPM
K− Offset
This equation describes the frequency of the output signal of all Rain Bird flow
sensors. By substituting the appropriate K and Offset values from the table, the
sensor’s output frequency can be calculated for each pipe size. This information
is required when calibrating an output board or when using the raw sensor data
as direct output to interface with a device that is not a Rain Bird product.
Column 6 This column indicates the suggested flow range of sensors in each pipe size.
Rain Bird sensors will operate both above and below the indicated flow rates.
However, good design practice dictates the use of this range for best
performance.
Sensors should be sized for flow rather than pipe size. To prevent disturbances
to the flow profile always connect the sensor tee to pipe nipples measuring at
least 10 pipe diameters in length on the upstream (supply) side and at least 5
pipe diameters in length on the downstream (delivery) side before making the
transition in pipe size.

Rain Bird Flow Sensors
Manual
7
CALIBRATION TABLE FOR PIPE SIZES 3” THROUGH 36”
Column1
Column2
Column3
Column4
Column5
Column6
SuggestedOperating
PipeSize
PipeO.D.
PipeI.D.
K Value
Offset
Range(GPM)
3" Sch10S
3.500"
3.260"
5.009
.090
12-400
Std.Wt.,Sch40
3.5"
3.068"
4.362
.063
12-400
ExtraStrong,Sch80
3.5"
2.900"
3.858
.043
12-400
PVCClass 125
3.5"
3.284"
5.094
.093
12-400
PVCClass 160
3.5"
3.230"
4.902
.085
12-400
PVCClass 200
3.5"
3.166"
4.682
.076
12-400
4" Sch10S
4.5"
4.260"
9.597
.241
20-600
Std.Wt.,Sch40
4.5"
4.026"
8.34
.229
20-600
ExtraStrong,Sch80
4.5"
3.826"
7.354
.188
20-600
PVCClass 125
4.5"
4.224"
9.396
.240
20-600
PVCClass 160
4.5"
4.154"
9.013
.240
20-600
PVCClass 200
4.5"
4.072"
8.578
.239
20-600
5" Sch10S
5.563"
5.295"
16.305
.250
30-900
Std.Wt.,Sch40
5.50"
5.047"
14.674
.248
30-900
ExtraStrong,Sch80
5.50"
4.813"
13.165
.246
30-900
6" Sch10S
6.625"
6.357"
24.089
.260
50-1,500
Std.Wt.,Sch40
6.5"
6.065"
21.574
.257
50-1,500
ExtraStrong,Sch80
6.5"
5.761"
19.457
.254
50-1,500
PVCClass 125
6.625"
6.217"
22.853
.258
50-1,500
PVCClass 160
6.625"
6.115"
21.968
.257
50-1,500
PVCClass 200
6.625"
5.993"
21.068
.256
50-1,500
8" Sch10S
8.625"
8.329"
43.914
0.286
80-2,500
Sch20
8.625"
8.125"
41.653
0.283
80-2,500
Sch30
8.625"
8.071"
41.063
0.283
80-2,500
Std.Wt.,Sch40
8.625"
7.981"
40.086
0.281
80-2,500
Sch60
8.625"
7.813"
38.288
0.279
80-2,500
ExtraStrong,Sch80
8.625"
7.625"
36.315
0.276
80-2,500
PVCClass 125
8.625"
8.095"
41.324
0.283
80-2,500
PVCClass 160
8.625"
7.961"
39.869
0.281
80-2,500
PVCClass 200
8.625"
7.805"
38.203
0.279
80-2,500
10" Sch10S
10.75"
10.420"
70.195
0.321
125-4,000
Sch20
10.75"
10.250"
67.668
0.318
125-4,000
Sch30
10.75"
10.136"
66.069
0.316
125-4,000
Sch40, Std.Wt.
10.75"
10.020"
64.532
0.314
125-4,000
ExtraStrong,Sch60
10.75"
9.750"
61.016
0.309
125-4,000
Sch80
10.75"
9.564"
58.644
0.306
125-4,000
PVCClass 125
10.75"
10.088"
65.431
0.315
125-4,000
PVCClass 160
10.75"
9.924"
63.272
0.312
125-4,000
PVCClass 200
10.75"
9.728"
60.733
0.309
125-4,000
12" Sch10S
12.75"
12.390"
104.636
0.367
175-5,000
Sch20
12.75"
12.250"
102.553
0.364
175-5,000
Sch30
12.75"
12.090"
99.347
0.36
175-5,000
Std.Wt.,Sch40S
12.75"
12.000"
97.576
0.358
175-5,000
Sch40
12.75"
11.938"
97.369
0.356
175-5,000
Sch60
12.75"
11.625"
90.441
0.348
175-5,000
ExtraStrong
12.75"
11.750"
92.775
0.351
175-5,000
Sch80
12.74"
11.376"
85.922
0.342
175-5,000
PVCClass 125
12.75"
11.966"
96.912
0.357
175-5,000
PVCClass 160
12.75"
11.770"
93.152
0.352
175-5,000
PVCClass 200
12.75"
11.538"
88.842
0.346
175-5,000
Continued on Next Page

Rain Bird Flow Sensors
Manual
8
CALIBRATION TABLE FOR PIPE SIZES 3” THROUGH 36”
Column1
Column2
Column3
Column4
Column5
Column6
SuggestedOperating
PipeSize
PipeO.D.
PipeI.D.
K Value
Offset
Range(GPM)
14" Sch10S
14.00"
13.500"
122.307
0.391
200-6,000
Sch20
14.00"
13.375"
120.216
0.388
200-6,000
Std.Wt.,Sch30
14.00"
13.250"
118.151
0.385
200-6,000
Sch40
14.00"
13.124"
116.096
0.382
200-6,000
Sch60
14.00"
12.814"
111.148
0.376
200-6,000
ExtraStrong
14.00"
13.00"
114.098
0.33
200-6,000
Sch80
14.00"
12.50"
106.299
0.369
200-6,000
16" Sch10S
16.00"
15.500"
159.243
0.44
300-9,000
Sch20
16.00"
15.375"
156.742
0.436
300-9,000
Std.Wt.,Sch30
16.00"
15.250"
154.267
0.433
300-9,000
Sch60
16.00"
14.688"
143.456
0.419
300-9,000
ExtraStrong,Sch40
16.00"
15.000"
149.394
0.427
300-9,000
Sch80
16.00"
14.314"
136.548
0.41
300-9,000
18" Sch10S
18.00"
17.500"
202.739
0.498
350-10,000
Sch20
18.00"
17.375"
199.828
0.494
350-10,000
Sch30
18.00"
17.124"
194.061
0.486
350-10,000
Std.Wt.
18.00"
17.250"
196.943
0.49
350-10,000
Sch40
18.00"
16.876"
188.464
0.479
350-10,000
Sch60
18.00"
16.500"
180.171
0.469
350-10,000
ExtraStrong
18.00"
17.000"
191.25
0.482
350-10,000
Sch80
18.00"
16.126"
172.152
0.457
350-10,000
20" Std.Wt.,Sch20
20.00"
19.25"
246.179
0.555
400-12,000
Sch40
20.00"
18.812"
234.836
0.540
400-12,000
ExtraStrong,Sch30
20.00"
19.000"
239.666
0.547
400-12,000
Sch80
20.00"
17.938"
213.14
0.511
400-12,000
22" Std.Wt.,Sch20
22.00"
21.25"
301.975
0.621
500-15,000
ExtraStrong,Sch30
22.00"
21.00"
294.642
0.616
500-15,000
Sch80
22.00"
19.75"
259.513
0.573
500-15,000
24" Std.Wt.,Sch20
24.00"
23.25"
364.331
0.666
600-18,000
ExtraStrong
24.00"
23.00"
356.178
0.660
600-18,000
Sch40
24.00"
22.624"
344.109
0.652
600-18,000
Sch80
24.00"
21.562"
311.271
0.628
600-18,000
26" Sch10
26.00"
25.376"
437.809
0.719
700-21,000
Std.Wt.
26.00"
25.25"
433.247
0.716
700-21,000
Sch20, ExtraStrong
26.00"
25.00"
424.274
0.709
700-21,000
28" Sch10
28.00"
27.376"
513.698
0.774
900-23,000
Std.Wt.
28.00"
27.25"
508.723
0.770
900-23,000
ExtraStrong,Sch20
28.00"
27.00"
498.930
0.763
900-23,000
30" Sch10
30.00"
29.376"
596.147
0.833
1,000-30,000
Std.Wt.
30.00"
29.25"
590.759
0.829
1,000-30,000
Sch20, ExtraStrong
30.00"
29.00"
580.146
0.822
1,000-30,000
32" Sch10
32.00"
31.376"
685.156
0.897
1,200-35,000
Std.Wt.
32.00"
31.25"
679.355
0.893
1,200-35,000
Sch20, ExtraStrong
32.00"
31.00"
667.922
0.885
1,200-35,000
Sch40
32.00"
30.624"
650.919
0.873
1,200-35,000
34" Sch10
34.00"
33.312"
777.566
0.964
1,300-40,000
Std.Wt.
34.00"
33.25"
774.511
0.962
1,300-40,000
ExtraStrong,Sch20
34.00"
33.00"
762.258
0.953
1,300-40,000
Sch40
34.00"
32.624"
744.022
0.940
1,300-40,000
36" Sch10
36.00"
35.376"
882.855
1.040
1,500-45,000
Std.Wt.
36.00"
35.25"
876.227
1.035
1,500-45,000
Sch20, ExtraStrong
36.00"
35.00"
863.154
1.025
1,500-45,000
Sch40
36.00"
34.50"
837.315
1.007
1,500-45,000

Rain Bird Flow Sensors
Manual
9
Impeller Assembly and Shaft Replacement
If you are replacing an existing Rain Bird sensor and have already calibrated your flow transmitter, no
calibration changes are necessary. For installation of a new flow transmitter or for relocation of a sensor in a
new pipe size, please refer to the calibration instructions in flow transmitter manual.
1) Depressurize pipe from which sensor is to be removed.
2) For Insert Style Sensors: Remove the three (3) lock
nuts that secure the positioning collar to the threaded
rods of metal sensor. For Tee Type Sensors: Remove
clevis pin.
Figure 3
Impeller Assembly and Shaft Replacement
NOTE DIRECTION OF ARROW
NOTE: Before removing lock nuts, record the dimension
from top of 2” NPT adapter to the bottom of the positioning
collar. This dimension will be required later to reinstall.
3) Remove the sensor from the hex adapter or the tee.
4) Note the impeller blade orientation relative to flow
arrows and the alignment hole in metalsensors beside
one of the sighting holes. In order to maintain proper
calibration, the impeller will have to be reinstalled in the
same manner with the impeller blades pointing toward
the small alignment hole, and into the flow direction as
indicated bythe flow arrows.
USE PLIERS HERE
NOTE DIRECTION OF
IMPELLER
USE METAL PIN TO
REMOVE CERAMIC SHAFT
5) To remove the old impeller blade assembly, push the old shaft out of the sleeve with the new shaft (or small
diameter rod) just far enough to grab the end with a pair of pliers and pull the shaft completely out. The
impeller assembly will now be free, and will drop out.
6) Inspect the shaft and bearings for wear, and replace as necessary.
7) Refer to Figure 3. To reinstall, position the impeller in the cavity oriented as in Step 4 so that the impeller
blades point into the flow direction and toward the small alignment hole located beside one of the sighting
holes on metal sensors. For Brass Tee Type the flow direction arrow on the top of the sensor housing
should point downstream with the impeller blades pointing upstream.
8) Carefully push the shaft through the sleeve and impeller, taking care not to damage bearings. Make sure
that the shaft is inserted far enough so that it clears the sleeve on each side of the impeller housing.
NOTE: If shaft is not carefully installed, the bearing can be deformed, preventing free rotation.
9) Inspect the O-rings for damage and replace as necessary. Clean the O-rings and the sleeve and lubricate
with silicone grease from the packet provided or some other acceptable lubricant.
10) Install the sensor into the 2” NPT adapter or tee so that alignment hole is facing upstream and flow arrows
point in the direction of the actual flow. Since the positioning collar was not loosened during this operation,
the studs should all line up perfectly when the sighting holes are parallel to pipe. If this has been
accidentally loosened, please refer to the installation instructions for the alignment of the flow sensor unit.
11) Install and tighten the nuts or replace the clevis pin.
12) For metal sensors, double check that the distance from the top of the 2” NPT adapter to the bottom of the
positioning collar equals the dimension as measured in Step 2, and holes in sleeve sight exactly down the
pipe, the arrows point in direction of flow and alignment holes located beside one sighting hole is pointing
towards the source. If not, refer to Installation section in this manual.
13) This completes the replacement procedure. The system may now be repressurized and tested.

Rain Bird Flow Sensors
Manual
10
Troubleshooting
1) Using a voltmeter on the 0-20 VDC scale, connect the voltmeter across the sensor wires which are
connected to the sensor input on the barrier strip. The voltage reading should be 8 VDC +/–0.5 V with no
flow in the pipe. If the reading is in range, go to step 2. If not, go to step 3.
2) With the sensor installed in the pipe and flow through the pipe, connect the volt meter across the sensor
wires at the sensor input of the barrier strip. The voltage should fall between 4 VDC and 8 VDC. The
higher the flow rate, the lower the DC voltage level should drop. It should not drop below 4 VDC as your
meter averages the DC level of the square wave signal generated by the sensor.
If this is correct, the flow sensor should be operational, and the flow monitor should display a flow rate or
the transmitter output should change with a change in flow at the sensor. The signal generated by the
sensor is a square wave with 5 msec pulses up to 100 Hz (at which time the pulses narrow to a 50% duty
cycle), the use of an oscilloscope on the 5 msec time base, 2 VDC/division would indicate that the sensor
is operating properly.
3) If the voltage at the sensor input is less than 7 VDC in a No Flow situation or less than 3 VDC in a flow
situation, disconnect the sensor from the barrier strip and measure the voltage at the sensor input
terminals of the barrier strip again. It should be between 8 VDC and 12 VDC. If the voltage is between 8-
12 VDC, the sensor is bad. If the voltage at the sensor input is still below 7 VDC or 3 VDC, the problem
may be with the monitor.
4) If you suspect that the sensor is bad, you can test the monitor circuitry by connecting a piece of wire to
one of the sensor input terminals and tap the other side of the wire to the other sensor input terminal.
Shorting across the sensor input terminals ON and OFF repeatedly allows the display to respond by trying
to calculate a flow rate for the frequency of your shorting action. If the display does not show a change
from 0.00, it indicates a problem with the monitor.
5) If the flow sensor wiring is shorted or grounded the blue light on the module may blink continuously.
Disconnect the flow sensor wire from the module in the controller. Remove and reinstall the module and
the flow rate should return to zero. If secondary surge protection was installed remove it. Check sensor
wiring for: 1) damaged insulation; 2) wire nuts must be direct burial type Rain Bird DBRY20 or 3M
DBR/Y-6; and 3) sensor should be connected on dedicated PE-39 cable with no other signals in the
cable. Fix the wiring and test the system.

Rain Bird Flow Sensors
Manual
11
Specifications
Sensor Sleeve and Hex Adapter for Brass Insert
Sensor (FS350B)
•Sleeve: Admiralty Brass, UNS C44300; Hex
Adapter: Valve Bronze, UNS C83600
Sensor Sleeve and Hex Adapter for Stainless Steel
Insert Sensor (FS350SS)
•300 Series Stainless Steel
Tee for FS100B
•Cast valve bronze, UNS C83600
Tee for PVC Tee Sensors (F###P and
IFS###BPS)
•Schedule 80 PVC per ASTM D-2462 and D-2467.
Virgin, unplasticized PVC resin, Type 1 cell
classification
12454-B. Fittings and solvent carry approval for
potable water by NSF and IAMPO.
Pressure, Temperature Ratings
•Depends on hardware configurations. See
Diagrams at end of this section.
Recommended Design Flow Range
•0.5 to 30 ft/sec
•Initial detection below 0.3 ft/sec
•0.3 to 15 ft/sec for FS100B
Accuracy
•± 1.0% of full scale over recommended design flow
range
Repeatability
•± 0.3% of full scale over recommended design flow
range
•± 0.7% of full scale over recommended design flow
range for FS100B
Linearity
•± 0.2% of full scale over recommended design flow
range
•± 0.7% of full scale over recommended design flow
range for FS100B
Transducer Excitation
•Typically provided by Rain Bird flow transmitter.
Any alternate supply must be of a resistance-limited
type meeting the following constraints:
•Source current @ 8 Volts: 1 mA minimum,20mA
maximum
•Short Circuit Current: 200 mA maximum
Output Frequency
•3.2 Hz to 200 Hz
•0.8 Hz to 80 Hz for FS100B
Output Pulse Width
• 5 msec ±25%
Electrical Cable
•48 inches of U.L. Style 1056 copper solid AWG 18
wire w/direct burial insulation. Rated to 105°C.
PRESSURE/TEMPERATURE DIAGRAMS FOR
RAIN BIRD FLOW SENSORS
100
80
60
40
20
0
0 25 60
Temperature (°C)
FS150P
FS200P
FS300P
FS400P
400
200
0
-20 30 50 105
Temperature(°C)
FS100B
FS350B
FS350SS
Data
Industrial®
[e-mail]
877-243-1010
Data Industrial is a registered trademark of
Badger Meter, Inc
© 2015 Badger Meter, Inc. All rights reserved.
+1-800-RAINBIRD (800-724-6247)
[phone]
® Registered Trademark of Rain Bird Corporation
PN# 72030 Rev C (03/23/15)
Pressure (psi)
Pressure
(psi)