Sensors > Magnetic field sensors
Magnetic field sensors

Contactless and reliable detection

Magnetic field sensors are used chiefly on cylinders and grippers for monitoring the piston position. The sensor thus recognizes the field of the magnet integrated into the piston through the actuator wall.

With their contactless position detection, Balluff's magnetic field sensors function reliably and wear free: No contact erosion, no bounce and only clean contact points. Even at high movement speeds, the piston position is reliably recognized.

The most important benefits

  • Contact-free and therefore wear-free
  • No double switching points
  • Reliable even at high movement speeds

Product family

Cylinder sensors for C-grooves

Firm grip and high flexibility

Cylinder sensors for C-grooves

Our magnetic cylinder sensors for c-grooves distinguish themselves with their particularly firm grip. They mount flush so that they are suitable for space-critical applications. Since all of our sensors for C-grooves can be installed from above, they also fit in those places where the groove ends are closed and lateral installation is not possible.

Balluff also offers extremely short designs that perfectly fit every gripper and short-stroke cylinder. The sensors detect piston position contactlessly through the cylinder walls. The system is adaptable for cylinders and grippers as well as with strong and weak magnets.

The features

  • Reliable switching behavior
  • Precise switching point
  • Contact-free and therefore wear-free
  • Resistant to dirt
  • Low hysteresis
Cylinder sensors for C-grooves
Cylinder sensors for C-grooves can mount flush so that they are also appropriate for space-critical use.
Cylinder sensors with metal housing

The reliable all-rounder for the harsh environment of metal processing

Cylinder sensors with metal housing

Our cylinder sensors with metal housing were custom developed for use in tough environments.

The magnetic-field-sensitive sensors are especially robust as regards welding spatter and flying sparks, as well as abrasion. They withstand high temperatures to 105°C without problems.

Our abrasion-resistant sensors with W attribution can differentiate between the magnetic fields which can be used for positioning the piston and the parasitic alternating magnetic fields which surround the conductive lines for welding. Welding currents to 25 kA cannot influence the sensor's functioning since the initial state of the sensor is stored during welding.

The features

  • Robust metal housing
  • Resistant to temperatures of up to 105ºC
  • Immunity to magnetic welding in types with W attribution
  • Exact position recognition even at high temperatures
  • Reliable switching process thanks to precise switching points
  • Wear free, since contactless and without moving parts
  • Resistant to dirt
Mini-sensors for mini-actuators

The smallest cylinder sensors – especially for short-stroke cylinders

Balluff has developed miniature cylinder switches especially for short-stroke cylinders and mini-grippers. Our mini-sensors are among the smallest on the market and have an exact switching point. They thus guarantee the highest precision even with minimal switching paths.

The features

  • Reliable switching process thanks to precise switching points
  • Contact-free and therefore wear-free
  • Resistant to dirt
  • Firm grip
  • Mounts quickly
  • Variations that connect to two sensors via only one plug
  • For BMF 103 with sliding block: With an active connection, only a short groove length is required (also available with one plug for two sensors)
Product finder
The mini-sensors have an exact switching point. Even with the narrowest switching paths, the sensor thus provides the highest precision!
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Sensors for pneumatics and hydraulics

Versatile solutions for almost every operational area

Sensors for pneumatics and hydraulics

The cylinder walls of pneumatically and hydraulically driven actuators and drive units are typically provided with grooves. The sensors which register the movement of the magnetic pistons are mounted here.

Balluff offers magnetic-field-sensitive sensors for all current C- and T-grooves as well as adapter elements that permit reliable mounting of the sensors on rods, tubes and other shapes. For example, solutions for short-stroke cylinders in gripper applications – with a configuration for two sensors on one plug. Or our miniature cylinder switches which are among the smallest sensors on the market. They feature an exact switching point and assure reliable use even in short groove lengths.

The features

  • Contact-free and therefore wear-free
  • Reliable position determination for all current cylinder drives
  • A small number of basic types assures universal implementation
  • Configurations with fixed or adjustable switching points
  • All current switching outputs and connection types
  • Configuration with two sensors on one plug
  • IO-Link Versions with maximum operating range
  • Product families with flexible mounting systems and adapters for a variety of mounting solutions
Cylinder sensors for round cylinders

Secure mounting with mounting bracket and hose clamp

Our cylinder sensors for round cylinders are securely integrated into different applications with the appropriate hose clamp and mounting bracket. The well thought-out mounting bracket concept is suitable for most types of cylinder up to 80 mm piston diameter. Piston position is registered contactlessly through the cylinder wall.

The features

  • Up to 80 mm piston diameter
  • Reliable switching process thanks to precise switching points
  • Contact-free and therefore wear-free
  • Resistant to dirt
  • Firm grip
  • Mounts quickly
Cylinder sensors for round cylinders
For round cylinders with various diameters, Balluff offers different hose clamps and mounting brackets. With this, a variety of possibilities are available to best solve applications.
Teachable cylinder sensors

More flexibility and comfort through adjustable multiple switching points

Our cylinder sensors for C- and T-grooves with adjustable multiple switching points enable quick integration of pneumatic and hydraulic cylinder drives in machine control.

Magnetic sensors with fixed switching points must be manually placed on the desired switching point and mounted in this position. With our teachable sensors, it is sufficient to place the sensor in the approximate place and fix it there. The switching point or switching points are then defined with the teach button" on the control panel.

In the simplest case, two different switching points on the same cylinder can be adjusted. In the IO-Link version, it is possible to define and scan up to eight switching points within the work area of the sensor. Using this, the sensors can, for example, recognize up to eight different object sizes in one gripper. In this manner, one sensor can replace multiple conventional sensors. This means significantly more comfort for you and greater flexibility and cost savings.

The features

  • Contact-free and therefore wear-free
  • Individual installation of the switching points without tools
  • Applicable for cylinders and grippers with radial or axial magnetic polarization
  • Remote-Teach of up to 8 switching points via IO-Link
  • Adjustable hysteresis for each individual switching point
  • Extremely large, 60 mm travel path
  • Universally applicable bracket for the teach-in module available
  • Status indication via multiple colored LEDs
  • Captive switching points even during power outage
Cylinder sensors for T-groove

Firm grip and high flexibility

Cylinder sensors for T-groove

Our magnetic cylinder sensors for T-grooves can be mounted directly in the groove and are distinguished by their particularly firm grip. They mount flush so that they are suitable for space-critical applications.

In addition, Balluff offers extremely short configurations for flexible use possibilities. The sensors detect piston position contactlessly through the cylinder walls. The system is adaptable for cylinders and grippers as well as with strong and weak magnets.

Thanks to the especially bright LEDs, they reliably recognize the switching state of the sensor even at a large distance. The cylinder sensors for T-grooves are also available in metal housings for use in very harsh environments, for example with welding spatter or flying sparks. Or with magnet-sensitive electronics for industrial environments with high welding currents.

The features

  • Reliable switching process thanks to precise switching points
  • Contact-free and therefore wear-free
  • Resistant to dirt
Cylinder sensors for T-groove
Cylinder sensors for T-grooves can mount flush so that they are also appropriate for space-critical use. There are also extremely short configurations which offer diverse installation possibilities.
Cylinder sensors for trapezoidal groove and trapezoidal guide

Firm grip and high flexibility

Our magnetic cylinder sensors for trapezoidal grooves can be easily mounted on the circle with holding brackets and adapters. The well thought-out mounting bracket concept is suitable for most types of cylinder with trapezoidal groove or trapezoidal guide. In addition, we offer sensor variants which fit directly on a cylinder with a 60° and 90° trapezoidal groove without a mounting bracket. The sensors detect piston position contactlessly through the cylinder walls. The system is adaptable for cylinders and grippers as well as with strong and weak magnets.

The features

  • Reliable switching behavior
  • Precise switching point
  • Contact-free and therefore wear-free
  • Resistant to dirt
Cylinder sensors for trapezoidal groove and trapezoidal guide
For trapezoidal grooves, Balluff has developed magnetic cylinder sensors which mount with mounting brackets onto the cylinder. In addition, we offer variations which fit directly on a cylinder with a 60° and 90° trapezoidal groove without a mounting bracket.
V-twin cylinder sensors

Save mounting costs with only one plug connector for two sensors

V-twin cylinder sensors

Two magnetic sensors are often necessary for smaller pneumatic hydraulic cylinders or grippers in order to determine the position of the piston. Our cylinder sensors reduce your mounting and wiring effort. This is because they offer a connection for two sensors with your plug connection. The electrical connection for both sensors takes place via one single 4-pole plug (M8 oder M12). Only one slot is therefore required to connect to the distribution box. You can thus double the number of possible sensors on one distribution box and in a simple manner simultaneously measure up to twice the number of positions on pneumatic grippers and cylinders.

In addition to time and effort, this system saves you acquisition and storage costs.

The features

  • Tie rod diameter up to 17 mm
  • Reliable switching process thanks to precise switching points
  • Contact-free and therefore wear-free
  • Resistant to dirt
  • Mounts quickly
Cylinder sensors for tie-rod cylinders

Classic mounting system for versatile use

Our cylinder sensors for tie-rod cylinders can be reliably integrated into a variety of applications. This is ensured by the mounting: The sensors are completely traditionally mounted with mounting brackets on cylinders with tie rods and DUO rails. The well thought-out mounting bracket concept is suitable for most current types of cylinder with any piston diameter. Piston position is registered contactlessly through the cylinder wall.

The features

  • Tie rod diameter up to 17 mm
  • Reliable switching process thanks to precise switching points
  • Contact-free and therefore wear-free
  • Resistant to dirt
  • Firm grip
  • Mounts quickly
Cylinder sensors for tie-rod cylinders
Cylinder sensors for tie-rod cylinders can be mounted with mounting brackets on cylinders with tie rods and DUO rails. A variety of possibilities is available thanks to this classic mounting process.
Magnetic Global cylinder sensors for pneumatic cylinders

Perfect hold in the cylinder slot

Compact magnetic Global cylindrical sensors from Balluff are accurately matched to the different cylinder groove forms and therefore provide an optimum hold. They can not only be installed flush in the respective slot, but also fit in completely thanks to their perfect fit.

The features

  • Compatible with nearly all common types of nut, such as C- or T-nuts
  • Large choice of cable and connector types
  • V-Twin® – one plug for two sensors
Reliable, wear-free position detection on all pneumatic cylinders