Features
No need the power supply when it works.
Bipolar excitation working mode, the sensor outputs a
pair of positive and negative electrical pulse signal
when the magnetic field polarity changes for a
circle.
Only when the external magnetic field polarity changes,
magnetic strength reaches the excitation threshold, the
sensor will outputs a pulse signal, so the vibration
won't happen. The operation is stable and
reliable.
The signal amplitude has nothing to do with the
magnetic field changing speed, and it can work at the
speed near to zero.
The signal processing is simple, and it can be directly
connected with transistors, comparators, A/D converter,
etc.
The output signal can be remote transmitted by the
signal lines, it's suitable for LAN
management.
No mechanic contact, no spark, is a kind of intrinsic
safety devices.
Wide operating temperature range, strong environmental
adaptability.
Performance
Index
|
Name
|
Symbol
|
Value
|
Unit
|
|
Excitation strength
|
Min.
|
B
|
3
|
mT
|
|
Typ.
|
5~6
|
|
Max.
|
12
|
|
Pulse signal amplitude
|
Vo
|
≥1.5
|
V
|
|
Pulse width(in the location of 1V)
|
τ
|
10~30
|
μS
|
|
DC internal resistance
|
Ro
|
650~850
|
Ω
|
|
Operating frequency
|
Min.
|
f
|
unlimited
|
kHz
|
|
Max.
|
10
|
|
Operating Temp.
|
T
|
-40~+125
|
ºC
|
|
Outline Dimension and Typical installation
location
|
-
|
See the figure
|
-
|
|
Sensitive silk location
|
D
|
2.5(distance to the bottom)
|
mm
|
|
Package
|
-
|
Aluminum shell, Epoxy potting
|
-
|
|
External lead
|
-
|
Resistance to high temperature soft wire
|
-
|
Sensor dimension and sensitive
silk location
Instruction
In the water meter application, the magnetic ring
of φ9.5×φ6.0×3.5 mm can be used, it is magnetized in
axial direction, a pair of poles. The surface magnetic
strength is more than 90 mT, the installation distance
from the surface of ring to the bottom of the sensor is
about 2.5mm.
Note: The sensor has certain requirements to the magnetic
strength, too strong or too weak magnetic field may
affect its operation.(See the excitation strength on
"Performance index" )
If using other material and shape of the magnet, it needs
to measure its magnetic field, and adjust the
installation distance.
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