Sensors are elementary components of automation. Increasingly precise and wear-free sensors with more and more reliable measurements enable a continuous improvement of the production process. Here, no-touch sensors working with an almost unlimited lifetime are playing a major role. In distance measuring, different measuring methods depending on the measuring range have established themselves. For the medium range between a few centimetres and several metres optical and ultrasonic systems are mainly used. Ultrasonic distance sensors are used in harsh, industrial environments, because they are independent of the material and the colour of the object to be measured, they cannot be disturbed by light, dust and fog, and they work very precisely and linearly with background suppression. PIL Sensoren GmbH has more than 25 years of experience in the field of ultrasonic distance measuring.