In the case where it is only necessary to track the edge of the web, you can choose an infrared or an ultrasonic sensor according to the kind of the material.

Features: 1,3ms response time；2,Dynamic compensation technology; 3,Red and green diodes to indicate the direction of deviation；

System accuracy: 0.01mm ；                         Humidity: <90% no condensation

Ambient temperature: -10℃～＋80℃ ；                  Protection class:IP54

Shell material: aluminum；                          Weight: 0.5Kg

Operating Voltage: 12VDC；                          Rated power: 3W

Effective detection range: 4mm                       Response time: 3ms