Digital Lever Meter LX1. The LX1 models of Digital Instruments are used to measure tension (s) on materials from .032" (20 AWG) to 5/32 inch diameter. Measure tension (s) on flexible cables, wires, filaments, tapes and ribbons where expected tensions range from 5 to 50 Lbs, 5 to 100 Lbs, 5 to 250 Lbs, or 25 to 500 Lbs. Read More >>>.