Sensor types at a glance: from inductive to radar
Which sensor type fits which application? This overview presents the common industrial sensors with their measuring principle, typical applications and the key selection criteria. Each type links to the matching product category in the shop.
Position sensors
Inductive sensors detect metallic objects without contact, using a high-frequency electromagnetic field. They are rugged, fast and wear-free, the standard for end-position and position sensing. See the inductive sensors in the shop.
Capacitive sensors detect plastic, wood, liquids and bulk material as well as metal, because they react to a change in capacitance. They are particularly suited to level detection through container walls. See the capacitive sensors.
Optical sensors use light and reach long distances. They come as through-beam, retro-reflective and diffuse-reflective types. They are ideal for detecting objects over a distance. See the optical sensors.
Ultrasonic sensors measure via the travel time of a sound pulse, regardless of an object's colour, gloss or transparency. They excel with clear liquids and shiny surfaces where optical methods fail. See the ultrasonic sensors.
Process sensors
Pressure sensors measure gauge, absolute or differential pressure and output it as 4–20 mA, 0–10 V or via IO-Link. They monitor hydraulics, pneumatics and process media. See the pressure sensors.
Temperature sensors usually measure with resistance probes (PT100/PT1000) or thermocouples. The choice depends on the measuring range and the accuracy required. See the temperature sensors.
Flow and level sensors monitor liquid and gaseous media: calorimetric, magnetic-inductive, by radar or ultrasonic. See the flow sensors and level sensors.
Motion control
Encoders capture angle, position and speed. Absolute encoders always provide an unambiguous position value, whereas incremental encoders count pulses and need a reference run after power-up. See the absolute encoders and incremental encoders.
Choosing the right type
You decide between the types based on material, distance, environment and the required signal. Our sensor selection guide offers a structured decision aid. For a quick shortlist, use the AI advisor.