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The
Directions of the Thin Magnetic Tunnel
Magnetic-sensitive Resistor (TMR)
1. Model: TMR01
2. Characteristics:
2.1. The thin magnetic tunnel magnetic-sensitive resistor model
TMR-01 has higher sensitivity more other one in the application
at the thin magnetic field that needs magnetic sensitivity only
to be a several ten mT. The variation rate of magnetic sensitive
resistor ≥5%.And effective operation distance to be longer may
≥ 30 mm. And directivity better and noise very lower.
2.2. Saturation Characteristics: Because of R0 have not changed
when the magnetic field H to be augmented to some value. So
in applications without add amplitude limiting circuit.
2.3. Resist impact and shake Capability: Correspond to the metal
film resistor; this cannot analogy to Hall devices.
2.4. That is having as high reliability, small volume, and operate
at rigorous environment etc excellence.
3. Parameters:
3.1. Resistance value: 0.8ΚΩ~5ＫΩ ( may ensure according to user
desire, usually tolerance ±1%).
3.2. The variation rate of magnetic sensitive resistor: ΔR/R0≥5%
（R0 ---is resistance value when without magnetic field; ΔR---
equal to resistance value when exist resistance value subtract
from one when without magnetic field ）
Field direction:
3.3. Operation voltage: 3.6~12V DC
3.4. Frequency response: ≥100 KHZ
3.5. Rated power: 150 mw.
3.6. Temperature coefficient of resistance: ≤1.5*10-3/℃
3.7. Range of working temperature: -40℃～+150℃)
3.8. Packaging: TO-92S-3L (to see figuration drawing. The mid
pin is idle)
Figuration drawing: (unit：mm)
4. Test condition：
4.1. Ambient temperature: 25℃±3℃；
4.2. Power supply: 6V DC；
4.3.Magnetic induction: ≈50 mT；
5. Purpose:
5.1. Switch quantity application
The magnetic-sensitive without contact switch make use of various
switch control of non-contact, without contact, non-spark, prevent
fire and blast etc. May to be applied to the flow sensor, the
actuator, the counter, the tachometer, the odometer, the velocity
transducer, the acceleration transducer, the auto-electronic-igniter
without contact, the remote water meter, the steam meter, the
gas meter, the recloser of the lift and the mine, the keyboard
switch of computer, the electric machine without brush, the
water level automatic control switch, the magnetic encoder,
the alarm, the liquid level display, the limit switch of auto-machine
tool, the robot, the switch of the automation product line etc.
5.2. Schematic diagram:
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