Badger Meter 250 Specifications

Flow Sensors

Series 250 Metallic Tee Flow Sensors

DESCRIPTION

The Series 250 flow sensor from Badger Meter® features a
six-bladed impeller design with a proprietary non-magnetic
sensing mechanism, mounted in a cast bronze housing, with
female NPT threads.

The unique impeller design is less prone to be fouled by
waterborne debris. The forward curved shape coupled with the
absence of magnetic drag provides improved operation and
repeatability even 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 receiving unit without the need
for amplification.

All sensors except irrigation versions are supplied with 20 ft
(610 cm) of 2-conductor 20 AWG shielded UL type PTLC 221° F
(105° C) cable and meet CE standards for noise immunity
and susceptibility.

FEATURES

• Sensor electronics easily removed from the tee

• Impeller, bearing and shaft are easily replaced in the field,
without changing calibration

• Two-wire sensor. Power and signal transmit on a single pair of
wires, up to a distance of 2000 ft (610 m)

• Digital signal easily interfaced with transmitters, monitors
or PLCs

APPLICATIONS

• Energy management and building management systems

• BTU sub-metering systems

• Cooling tower treatment systems

• Condensate return lines

SPECIFICATIONS

Wetted
Materials

Tee for 250B Cast valve bronze, UNS C83600
Maximum

Temperature
Maximum

Pressure at
100° F

Recommended
Design Flow
Range

Accuracy ± 1.0% of rate
Repeatability ± 0.7% over recommended design flow range
Linearity ± 0.7% over recommended design flow range
Rangeability 60:1

Transducer
Excitation

Electrical Cable
for IR Sensor
Electronics

Electrical Cable
for Standard
Sensor
Electronics

Certifications CE certified

See "Part Number Construction" on page 3

Standard electronics: 221° F (105° C)
Irrigation electronics: 150° F (66° C)

400 psi

0.3…15 ft/sec (0.15…9 m/sec)

Supply voltage = 8V DC min. 35V DC max.

Quiescent current = 600 uA (typical)

OFF State (V
impedance)

ON State (V

48 in (122 cm) of UL style 116666 copper solid AWG 18
wire with direct burial insulation. Rated to
221° F (105° C).

20 ft (610 cm) of 2-conductor AWG 20 with AWG 22
drain wire shielded UL type PTLC wire provided for
connection to display or transmitter unit. Rated to 221°
F (105° C). May be extended to a maximum of 2000 ft
(610 m) with similar cable and insulation appropriate
for application.

) = Supply voltage – (600 uA * Supply

High

) = 1.2V DC @ 40 mA (15 Ω + 0.7V DC)

Low

SEN-DS-01555-EN-06 (February 2018)

Product Data Sheet

Dimensions

DIMENSIONS

Sensor No.
See Ta ble

Tee No.
See Ta ble

E

Dia.

Minimum Sensor Removal Clearance

D

Hex.

A

Overall Length

C

B

Overall

Height

Series No.
Complete

250B-0.5 See Matrix 813168T 1/2 - 14

250B-0.75 See Matrix 813169T 3/4 - 14

250B-1.0 See Matrix 81940T 1.00 - 11.5

250B-1.25 See Matrix 81941T 1.25 - 11.5

250B-1.5 See Matrix 811193T 1.50 - 11.5

Sensor

No.

Tee No. NPT A B C D E

Figure 1: Dimensions

4.0 in.

(102 mm)

4.0 in.

(102 mm)

5.45 in.

(138 mm)

6.06 in.

(154 mm)

6.5 in.

(165 mm)

4.67 in.

(119 mm)

4.67 in.

(119 mm)

4.75 in.

(121 mm)

5.0 in.

(127 mm)

5.19 in.

(132 mm)

3.61 in.

(92 mm)

3.61 in.

(92 mm)

3.75 in.

(95 mm)

3.88 in.

(99 mm)

3.94 in.

(100 mm)

N/A

N/A

2.0 in.

(51 mm)

2.25 in.

(57 mm)

2.5 in.

(64 mm)

1.63 in.

(41 mm)

1.63 in.

(41 mm)

2.12 in.

(54 mm)

2.38 in.

(60 mm)

2.62 in.

(67 mm)

Page 2 February 2018SEN-DS-01555-EN-06