The sensors in the GLM family are FixPitch sensors based on the Giant MagnetoResistive (GMR) effect. The sensors were developed specifically for use in ferromagnetic tooth structures. A magnet is therefore integrated into every sensor to stimulate the tooth structure.
This operating principle allows existing machine elements, such as gear wheels or threaded spindles, to be used as measurement scales. These must have a ferromagnetic material property and must have a tooth pitch that matches the sensor pitch.
No specific tooth forms are required. Sensors can therefore also be operated on a hole structure or a square tooth structure.
Sensitec is increasing the sensor efficiency by means of various design modifications to the chip layout. The patented solutions, described more closely below, also contribute to better signal quality, reduced sensitivity to stray fields and increased control accuracy.