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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.
AUTOMATION
High resolution, high reliability and robustness are just some of the key features of MR sensors that make them attractive in automation applications. Whether in assembly machines, industrial robots or handling equipment, MR sensors provide high availability and high performance at reasonable cost.
Typical Applications
- Linear encoder for direct drive motor
- Limit switch for pneumatic cylinder
- Integrated encoder for ball bearing
APPLICATION EXAMPLE: Door actuator for a passenger lift
Requirements
Frequency converter, line filter, encoder and asynchronous motor are to be integrated within a single housing for the door of a passenger lift. Improved control characteristics are to be made available by the use of a motor encoder, despite shaft running tolerances of ±2 mm.
Key Specifications
- Resolution:
- <0.05°
- Accuracy:
- 0.3°
- Rotational speed:
- <6.000 rpm
Solution from Sensitec
A length sensor of the AA700 family with FREE PITCH design and a customized reference sensor for the second track are used to scan a magnetic wheel.
Why use MR sensor technology?
- Assembly tolerances of several mm are permissible
- No mechanical wear in the measurement system
- Highly dynamic measurement due to the MR technology
- Resistant to oil, humidity and extreme temperature changes