A tension meter is a device used to measure tension in wires, cables, textiles, belts and more. Meters commonly use a 3 roller system where the material travels through the rollers causing deflection in the center roller that is connected to an analog indicator or load cell on digital models. Single roll tension sensors and sonic tension meters are other types of tensionmeters. Tension meters are available as handheld device or as an equipment for fixed installation. These are basically necessary to build up a tension-controlled closed loop.