Sensors > Inductive sensors
Inductive sensors

For non-contact detection of metallic targets

For non-contact detection of metallic targets at ranges generally under 50mm (2 inches). Inductive proximity sensors emit an alternating electro-magnetic sensing field. When a metal target enters the sensing field, eddy currents are induced in the target, reducing the signal amplitude and triggering a change of state at the sensor output.

Advantages of inductive proximity sensors include:

  • Ignores water, oil, dirt, and non-metallic particles
  • Insensitive to target color or target surface finish
  • Resistant to dirt
  • Short-circuit protected
  • Withstands high shock and vibration environments

Product families

Global sensors

Globally proven sensor solutions for controlling, positioning and monitoring

Our inductive global sensors for object detection are robust and reliable. With a wide range of over 500 offerings, we offer the right inductive sensor for every application.

The global Inductive sensors are standardized and available worldwide, with an optimum price/performance ratio that offers a sensor solution that is readily available.

The features

  • Cylindrical sensors in Ø 6,5 mm, M8, M12, M18, M30 and 40 × 40 mm block design
  • Flush and Non-Flush versions
  • Flush ranges up to 15 mm
  • Non-flush ranges up to 30 mm
  • Connector or cable connection
Inductive global sensors
Miniature sensors

Compact Sensors for Factory Automation

Miniature inductive sensors

Inductive mini-sensors are ideal for position sensing in small compact applications. Balluff miniature sensors offer fully integrated electronics making external amplifiers unnecessary.

Their low weight of 0.7 g permits applications with extreme accelerations. Making them a great choice for high speed applications.

Balluff Inductive mini sensors are characterized by an optimum price/performance ratio. They are easy to install and can be fully integrated even in narrow assemblies such as linear slides, valves and actuators. As a result, position sensing is now possible where there was never before space for a sensor.

Inductive mini sensors are available in ultra-small diameters: including 3 mm though 6 mm.

Product features

  • Ideal for compact applications
  • Ultra - short housing
  • Low weight (0.7 g) for extreme accelerations
  • Stainless steel housing for rugged applications
Miniature inductive sensors
Inductive mini-sensors permit extremely fast accelerations in Pick-and-Place applications
Inductive Factor 1 sensors

Sense all ferrous and non-ferrous metals at the same sensing operating distance

Factor 1 sensors

Factor 1 Inductive Sensors

Sense all ferrous and non-ferrous metals at the same sensing distance Ideal for use in applications where sensors encounter high levels of magnetic interference from sources such as transformers, motors, drives, or welders. Factor 1 sensors incorporate a Balluff-developed multi coil design that enables them to sense all metals – both ferrous and non-ferrous – at the same distance. Standard M8, M12, and M18 sizes are available in the tubular style and 40x40x40 mm in block style.

Factor 1 sensors were designed with welding applications specifically in mind. The PTFE coating helps protect the sensor from weld spatter and weld flash generated during the welding process. Additionally, Balluff currently offers many Factor 1 models with weld resistant coating applied to the face of the sensor, this coating is a major advance over PTFE coated sensors. Beyond their enhanced application flexibility, Balluff Factor 1 sensors also provide the opportunity to standardize on a smaller number of sensor designs, which can lower supply chain and tool crib stocking costs, especially for welding operations. They also offer attractive pricing advantages because they are positioned between standard and weld-field immune products.

Features

  • High sensing distance without reduction factor for all metals
  • Magnetic-field-resistant (WFI)
  • Available with PTFE coating
Factor 1 sensors identify objects, such as those made of steel, aluminum or brass, with identical switching distances (without reduction factor).
Pressure-rated inductive sensors

Perfect for use in hydraulic cylinders and valves

Pressure-rated inductive sensors

In the wide range of hydraulic applications, high pressure proximity sensors are exposed to many aggressive media and hostile environments.

Balluff offers a world-class line of pressure inductive cylinder sensors to service high pressure applications. Designed to withstand severe duty, Balluff high pressure sensors deliver reliable switching performance under demanding industrial conditions.

Corrosion-resistant housing materials, high-strength ceramic sensing faces, and special sealing techniques allow dependable service up to 500 bar according to the sensor type.

All Balluff high pressure sensors are rated for continuous operation in ambient temperatures up to 80º C, with some versions also high temperature rated up to 120º C.

Features

  • Pressure rated to 500 bar
  • High-temperature-resistant up to 120 °C
  • Overall dimensions from M5 to M18
  • Short and long housing configurations
  • With or without fixed stop
In the wide range of hydraulic applications, high pressure proximity sensors are exposed to many hostile environments.
Harsh environment sensors

Built tough - aggressive cleaning is no match for these stainless steel sensors

Hygienic sensors

Balluff harsh environment sensors can resist the most extreme cleaning processes. In the food and beverage industry, chemical industry, and even in handling technology, inductive proximity sensors are cleaned with increasingly aggressive methods. Whether they are faced with acids, alkalis, steam, foam cleaners, or high-pressure cleaning equipment, these stainless steel sensors are especially suited to heightened demands.

Features

  • Stainless steel housing
  • Chemical resistance
  • High degree of protection IP67 to IP69K
  • Increased temperature range available
  • Ecolab, FDA certifications available
Inductive distance sensors

Reliable measuring

Inductive distance sensors in square configuration

Balluff analog voltage, current or IO-Link sensors in square configuration test not only the presence of metallic objects. They can also reliably differentiate between parts of varying shapes and sizes and precisely determine distances. Using their analog or digital linear characteristics, the sensors can be used for clamping force measurement or to measure imbalances.

The multiplicity of available configurations allows the inductive distance sensors to be easily integrated into any applications. The sensors work motionlessly and are wear-free and, therefore, distinguish themselves by a long service life.

Features

  • Compact, solid and reliable
  • Contact-free and therefore wear-free
  • Absolute measuring principle
  • Measurement range from 0.2 to 50 mm
  • Short response time, high reproducibility and linearity
  • Broad temperature range, minimal temperature drift
  • Simple application via analog interfaces and IO-Link
Analog inductive distance sensors cylindrical configuration

Reliable measuring, differentiation and determination

Inductive distance sensors in cylindrical configuration

Our BAW analog voltage, current or IO-Link sensors test not only for the presence of metallic objects. They can also reliably differentiate between parts of varying shapes and sizes and precisely determine distances. Using their analog or digital linear characteristics, the sensors can be used for clamping force measurement or to measure imbalances or for implementation of a soft stop in the cylinder.

The Teach function offers an adjustable linearity range. This allows a quick start-up at first installation and provides for short down times during sensor exchange. The multiplicity of available configurations allows the inductive distance sensors to be easily integrated into any applications.

The sensors work motionlessly and are wear-free and, therefore, distinguish themselves by a long service life.

Features

  • Compact, solid and reliable
  • Contact-free and therefore wear-free
  • Absolute measuring principle
  • Measurement range from 0.2 to 20 mm, also teachable
  • Short response time, high reproducibility and linearity
  • Broad temperature range, minimal temperature drift
  • Simple application via analog interfaces and IO-Link
Weld field immune inductive sensors

Magnetic-field-proof and weld field immune – for rough industrial applications

Magnetic-field-resistant inductive sensors

Weld field immune inductive sensors are used for work-piece positioning in welding areas where strong magnetic fields influence ordinary sensors oscillator/coil systems. This leads to false switching when no target is present. Balluff weld field immune inductive sensors can be mounted in the direct vicinity of welding tongs or electrodes, since welding currents of up to 100 kA do not affect the switching function of the sensor.

Features

  • Extremely robust
  • Magnetic-field-resistant
  • Weld-splatter-resistant coatings
  • Resistant to abrasive media and cleaning agents
Magnetic-field-resistant inductive sensors
Magnetic-field-resistant inductive sensors are insensitive to magnetic fields arising from electric welding currents to 25 kA (at a distance of approx. 5 cm from current-carrying conductors).
Steel Face inductive sensors

Rugged sensors for harsh applications

Inductive sensors with stainless steel housing and sensor front

For error-proofing and part-present applications in heavy manufacturing, inductive sensors are often - by necessity - placed directly in harm’s way. Impact, abrasion, and particulate erosion can destroy conventional plastic-faced sensors and their thin metal bodies. Balluff steel face sensors are designed and built tough to survive longer in your most abusive applications. Machined from solid stainless steel bar stock, steel face sensors can extend life expectancy where blunt impact, abrasion, and erosion quickly bring standard sensors to their knees. Balluff steel face sensors are available in 1X standard range and 2X or 3X extended range, along with special variants like PTFE-coated housings to repel weld spatter, and ferrous- or non-ferrous-selective electronics to sense a variety of different metals.

Specify steel face sensors for the toughest applications to ensure high-throughput, trouble-free production. Retrofit existing production lines with rugged steel face sensors to gain back lost productivity, cut maintenance requirements, reduce sensor replacement costs, and boost overall plant productivity.

Features

  • Robust stainless steel housing
  • Extended switching distance
  • Factor 1 sensors and selective sensors (ferrous/non-ferrous)
  • Resistant to abrasive media and cleaning agents
Stainless steel faced inductive sensors
Stainless steel face inductive sensors with selective response ignore ferrous or non-ferrous metals, depending on the version.
High temperature sensors

For extreme applications up to 160°C

Temperature-resistant sensors

The ultra-high temperature-resistant inductive sensors can be used at temperatures of up to 160 ºC. These sensors are ideal for harsh environments in the steel industry, in plastic injection molding machines, and in forging and foundry processes.

Features

  • No sensing distance drift under temperature
  • Temperature ranges to 160 °C available
  • High degree of protection to IP68
  • Stainless steel housing
High temperature-resistant sensors
The ultra-high temperature-resistant inductive sensors can be used in temperature ranges up to +160 °C. These sensors are ideally suited to harsh environments in the steel industry, in plastic injection molding machines and in forging and foundry processes.
BIP inductive positioning system – measurement range to 14 millimeters

BIP inductive positioning system: 0 bis 14 mm adjustment

BIP inductive positioning system

The measurement range of this inductive positioning system is adjustable from 0 to 14 mm. Perfectly integratable, its close installation requirements are also impressive. The system measures the position of metallic objects with highest precision without contact and thus also wear-free. Thus it securely detects linear displacement paths for a simple metal target. Even a simple component of the machine such as a rotary disc can function as a target. Measured values are relayed via IO-Link or as analog, depending upon the design.

The main field of application for the system is the monitoring of drive spindles and clamping devices. Here the inductive positioning system provides for error-free clamping operations. The positioning system can further be used in mechanical engineering for many other applications with linear motion, such as determining punching depth, gripping positions, roller placements, valve positions, etc. High repeatability thus guarantees optimal process quality.

Features

  • Measurement range settable from 0 to 14 mm
  • No mechanical adjustment is necessary
  • Contact-free and therefore wear-free
  • High repeat accuracy and precise positioning
  • Analog and digital interfaces
BIP inductive positioning system – measurement range to 40 millimeters

BIP inductive positioning system: 0 to 40 mm adjustment

BIP inductive positioning system

The measurement range of this inductive positioning system is adjustable from 0 to 40 mm. The compact form factor is easy to integrate into existing machinery. The system measures the position of metallic objects with high precision without contact and is wear-free. Thus it securely detects linear displacement paths for a simple target. Even a simple component of the machine such as a rotary disc can also function as a target. Measured values are relayed via IO-Link or as analog, depending upon the design.

The main field of application for the system is the monitoring of drive spindles and clamping devices. Here the inductive positioning system provides for error-free clamping operations. The positioning system can further be used in mechanical engineering for many other applications with linear motion, such as determining punching depth, gripping positions, roller placements, valve positions, etc. High repeatability thus guarantees optimal process quality.

Features

  • Measurement range settable from 0 to 40 mm
  • No mechanical adjustment is necessary
  • Contact-free and therefore wear-free
  • High repeat accuracy and precise positioning
  • Analog and digital interfaces
BIP inductive positioning system – measurement range to 133 millimeters

BIP inductive positioning system: settable from 0 to 133 mm

BIP inductive positioning system

The measurement range of this inductive positioning system is adjustable from 0 to 133 mm. Perfectly integratable, its close installation requirements are also impressive. The system measures the position of metallic objects with highest precision without contact and thus also wear-free. Thus it securely detects linear displacement paths for a simple target. Even a simple component of the machine such as a rotary disc can also function as a target. Measured values are relayed via IO-Link or as analog, depending upon the design.

The main field of application for the system is the monitoring of drive spindles and clamping devices. Here the inductive positioning system provides for error-free clamping operations. The positioning system can further be used in mechanical engineering for many other applications with linear motion, such as determining punching depth, gripping positions, roller placements, valve positions, etc. High repeatability thus guarantees optimal process quality.

Features

  • Measurement range settable from 0 to 133 mm
  • No mechanical adjustment is necessary
  • Contact-free and therefore wear-free
  • High repeat accuracy and precise positioning
  • Analog and digital interfaces
BIP inductive positioning system
Inductive displacement sensors detect linear motion and provide a position-dependent output signal. The compact design makes them easy to integrate and monitor assembly and joining processes.