Page 13 of catalogue Linear inductive displacement sensors of Micro-Epsilon Messtechnik GmbH & Co. KG

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induSENSOR LDR series technology and principle

The Inductive sensors in the LDR series are constructed as half-bridge systems with center tap. An unguided plunger moves in the interior of the sensor coil, which consists of symmetrically constructed winding compartments. The plunger is joined to the moving measurement object via a thread. Due to the movement of the plunger within the coil, an electrical signal is produced which is proportional to the displacement covered. The specific sensor configuration facilitates a short, compact design with a small diameter. Three connections are required as an interface to the sensor. Compared to the familiar LVDT Sensors, both the sensor length and the diameter have been significantly reduced. As with the sensors series VIP and LVDT, the LDR series represents a safe, rugged, reliable and wear free measurement
U a / Ia Ue amplifier target plunger
block diagram LDR series

measuring range

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method. The inexpensive LDR sensors are also particularly suitable for large scale installation under restricted spatial conditions and in industrial environments with a high measuring rate.