Diameter monitoring for unwinders

A constant sheet tension is required when unwinding sensitive film material. The diameter of the roll is determined so the discharge of label films can be controlled correctly. Rugged ultrasonic sensors from the UM18 product family accurately detect the diameter and switch when defined limit values are reached. In this case, the operator receives an additional signal to change the roll in good time.

  • Following product families can be used
    Product family UM18
    Simple set up, perfect detection
    • Reliable measurement, regardless of material color, transparency, gloss, or ambient light
    • Sensing ranges up to 1,300 mm
    • Short metal or plastic M18 housing from 42 mm in length
    • Straight or angled design
    • Immune to dirt, dust, humidity, and fog
    • Versatile interfaces including IO-Link available