DESCRIPTION
The ZMY20 is an extremely sensitive magnetic sensor employing the magneto-resistive effect of thin film permalloy. It allows the measurement of magnetic fields or the detection of magnetic parts. The highly sensitive and small size magnetoresistive sensors consist of a chip covered with thin film permalloy stripes. These stripes form a Wheatstone bridge, whose output voltage is proportional to the magnetic field component Hy. A perpendicular field Hx is necessary to stabilize sensor operation. This can be done by using a small permanent magnet.

FEATURES
• Output voltage proportional to magnetic field Hy
• Adjustment of sensitivity and suppression of
   hysteresis by the auxiliary magnetic field Hx
• Magnetic fields vertical to the chip level are not
   effective

APPLICATIONS
• Linear position sensors for process control, door
   interlocks, proximity detectors, machine tool
   sensing
• Scalar measurement for compassing
• Automotive – door switches, engine position &
   speed sensing
• Metering of fluids by sensing rotation of impeller
• Traffic counting & vehicle-type sensing