
Flow Sensors
Series 225BR, 226BR, 226SS Hot Tap Flow Sensors
DESCRIPTION
The Series 200 flow sensors feature a six-bladed impeller design
with a proprietary non-magnetic sensing mechanism. The forward
swept impeller shape provides higher, more consistent torque
and is less prone to be fouled by water borne debris. The forward
curved shape coupled with the absence of magnetic drag provides
improved operation and repeatability at lower flow rates. This is
especially true where the impeller is exposed to metallic or rust
particles found in steel or iron pipes. As the liquid flow turns the
impeller, a low impedance square wave signal is transmitted with
a frequency proportional to the flow rate. The signal can travel up
to 2000 ft (610 m) between the flow sensor and the display unit
without the need for amplification. All sensors except irrigation
versions are supplied with 20 ft (6 m) of 2-conductor 20 AWG
shielded UL type PTLC 221° F (105° C) cable.
MODEL 225BR AND 226BR/226SS SENSORS
The 225BR and 226BR/226SS flow sensors are used for flow
measuring applications in most metallic or non-metallic pipes
where it would be difficult to shut down or drain the line for
installation or service. The 225 flow sensor features a gate valve for
isolation. The 226 flow sensor uses a ball valve. If the pipe is to be
hot tapped, the ball valve is recommended. The sensor mounts in
a 2 in. NPT pipe saddle or Threadolet® for installation in pipe sizes
from 3…40 in. Positioning nuts on the three threaded retaining rods
allow the sensor to be accurately positioned to a standard insertion
depth of 1-1/2 in. into the pipe.
When this insertion depth is maintained and there are at least
10 upstream and 5 downstream diameters of straight uninterrupted
flow, an accuracy of ±1 percent of full scale can be obtained
between flow velocities of 0.5…30 feet/second. Each sensor has an
isolation valve and pipe nipple to allow the sensor to be installed in
a pressurized pipe. This is accomplished by first attaching a saddle
or Threadolet to the pipe and screwing the nipple and isolation
valve into the saddle or Threadolet fitting. A hole is then drilled
through the pipe using a commercial tapping machine. When
completed, the tapping apparatus is removed, the isolation valve
is closed, and the sensor is installed using the Model HTT Hot Tap
Tool. For installation information, see the Hot Tap Flow Sensor, Series
225/226, Application Data Sheet, available in the Resource Library at
www.badgermeter.com.
OTE:N The overall length of the sensor tube is 18 in. (46 cm),
however, a clearance height of 35 in. (89 cm) should be
allowed for the fully extended length of the sensor tube
outside the isolation valve.
SPECIFICATIONS
Wetted
Materials for
All Sensors
Sensor Sleeve
and Hex
Adapter for
225BR and
226BR
Sensor Sleeve
and Hex
Adapter for
226SS
Temperature
Ratings
Pressure
Ratings
Recommended
Design Flow
Range
Accuracy
Repeatability ± 0.3% of full scale over recommended design flow range
Linearity ± 0.2% of full scale over recommended design flow range
Transducer
Excitation
Output
Frequency
Output Pulse
Width
Electrical Cable
for Standard
Sensor
Electronics
Electrical Cable
for IR Sensor
Electronics
See "Part Number Construction" on page 3
Sleeve: Admiralty Brass, UNS C44300
Hex Adapter: Lead-free Brass C89833
316 Series Stainless Steel
Standard Version: 221° F (105° C) continuous service
Irrigation Electronics: 150°F (66° C)
Model At 100° F
225BR 300 psi 210 psi
226BR 400 psi 250 psi
226SS 400 psi 300 psi
0.5…30 ft/sec
Initial detection below 0.3 ft/sec
± 1.0% of full scale over recommended design flow range
± 4.0% of reading within calibration range
Supply voltage = 8V DC min. 35V DC max.
Quiescent current = 600 uA (typical)
OFF State (V
impedance)
ON State (V
3.2…200 Hz
5 msec ±25%
20 feet (6 m) of 2-conductor 20 AWG shielded U.L. type
PTLC wire provided for connection to display or analog
transmitter unit. Rated to 105° C. May be extended to
a maximum of 2000 feet (610 m) with similar cable and
insulation appropriate for application.
48 inches (122 cm) of U.L. Style 116666 copper solid AWG
18 wire with direct burial insulation.
Rated to 221° F (105° C).
High
Low
(High Temperature Model Only)
) = Supply voltage – (600 uA * Supply
) = 1.2V DC @ 40 mA (15 Ω + 0.7V DC)
At 300° F
SEN-DS-01556-EN-06 (February 2018)
Product Data Sheet

Dimensions
DIMENSIONS
Bleed Petcock
Hex Nut
Isolation
Valve
Jam Nut
Nipple
8.5 in. (22 cm) MIN - 11.5 in. (29 cm) MAX
Lock Nut
Positioning Collar
2 in. NPT
Adapter
Isolation Valve Assy.
1.5 in (3.8 cm) Insertion Depth
16.375 in. (42 cm) Sensor Length
Figure 1: 225/226 Dimensions
OTE:N All dimensions are for reference only. To remove the flow sensor, there must be 25 in. (89 cm) clearance above the outside wall of
the pipe. A cutting tool may require additional clearance.
PART NUMBER CONSTRUCTION
225 Standard Sensor
Example: 2 25 BR 00 0 5 - 1 2 1 1
STYLE
Hot Tap Insert - Gate Valve 25
MATERIAL
Brass BR
SIZE
Insert Style 00
ELECTRONICS HOUSING
PPS 0
ELECTRONICS
Standard Flow (STANDARD) 5
IR-Irrigation 6
O-RING
®
EPDM (STANDARD) 1
Buna N 8
SHAFT
Zirconia Ceramic 0
Tungsten Carbide (STANDARD) 2
316 Stainless Steel 6
IMPELLER
Nylon (STANDARD) 1
0
BEARING
UHMWPE (STANDARD) 1
®
®
Page 2 February 2018SEN-DS-01556-EN-06
2
3

225 High Temperature Sensor
Example: 2 25 BR 00 4 8 - 0 2 2 3
STYLE
Hot Tap Insert - Gate Valve 25
MATERIAL
Brass BR
SIZE
Insert Style 00
ELECTRONICS HOUSING
PEEK 4
ELECTRONICS
High Temperature 8
O-RING
®
SHAFT
Tungsten Carbide (STANDARD) 2
IMPELLER
®
BEARING
Part Number Construction
0
2
3
226 Standard Sensor
Example: 2 26 SS 00 0 5 - 1 2 1 1
STYLE
Hot Tap Insert - Ball Valve 26
MATERIAL
Brass BR
Stainless Steel (Model 226 Only) SS
SIZE
Insert Style 00
ELECTRONICS HOUSING
PPS 0
ELECTRONICS
Standard Flow (STANDARD) 5
IR-Irrigation 6
O-RING
®
EPDM (STANDARD) 1
Buna N 8
SHAFT
Zirconia Ceramic 0
Tungsten Carbide (STANDARD) 2
316 Stainless Steel 6
IMPELLER
Nylon (STANDARD) 1
®
BEARING
UHMWPE (STANDARD) 1
®
0
2
2
3
Page 3 February 2018 SEN-DS-01556-EN-06

Flow Sensors, Series 225BR, 226BR, 226SS Hot Tap Flow Sensors
226 High Temperature Sensor
Example: 2 26 SS 00 4 8 - 0 2 2 3
STYLE
Hot Tap Insert - Ball Valve 26
MATERIAL
Brass BR
Stainless Steel (Model 226 Only) SS
SIZE
Insert Style 00
ELECTRONICS HOUSING
PEEK 4
ELECTRONICS
High Temperature 8
O-RING
SHAFT
Tungsten Carbide (STANDARD) 2
IMPELLER
®
BEARING
0
2
3
Control. Manage. Optimize.
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