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MR-Sensors
Where do you use MR-sensors?
MR-sensors, evaluation electronics and magnetic scales from Sensitec are in use everywhere, where movement is being controlled and steered, where paths, angles, positions, electric or magnetic fields are measured and detected.
What is the MR effect?
The MagnetoResistive Effect, "MR-Effect", has been known for 150 years. However, its use in sensor applications was first made practically possible through the development of thin-film technology some 30 years ago.
You will find us
… at the following exhibitions and fairs.
Our exhibition team is looking forward to presenting you our new products and innovations and to giving you technical advice for your individual measuring application.
Consumer Products
MR-based sensors can also be used for measuring weak magnetic fields, for example, the terrestrial magnetic field. By using two sensors mounted at a right-angle to each other the exact direction of the field can be measured to provide an electronic compass function in a range of portable or hand-held devices.
Typical Applications
- Compass in trekking watch
- Compass in mobile phone / PDA
Compass function in a wristwatch
Requirements
A compass function is to be integrated into a wristwatch to give the user orientation when rambling or participating in other outdoor sports.
Key Specifications
- Resolution:
- 1°
- Accuracy:
- < 2°
- Temperature range:
- -20° C up to +70° C
Solution from Sensitec
The MF1 magnetic field sensor is used to provide the compass function. In order to provide the highest functionality and also to ensure reliable operation regardless of the attitude of the watch the compass function is provided by 3 sensors each measuring a single angle in space.
Why use MR sensor technology?
- High level of integration due to miniaturized sensor elements.
- Low power consumption in the application and therefore long battery life.
- Resistant against vibration and shock.
- Robust with respect to humidity and dirt.