Sonic Tension Meter 507C - Gates UnittaGates unique Sonic Tension Meter simply converts this frequency into a measurement of tension. Here's how it works: First, enter belt mass constant, belt width Sonic Tension Meter 507C Consistent, accurate  - GatesGates unique Sonic Tension Meter simply converts this frequency into a measurement of tension. Here's how it works:First, enter belt mass constant, belt width 
Gates Sonic Tension Meter 508C (replaces 507C)Gates unique Sonic Tension Meter simply converts this frequency into a measurement of tension. Here's how it works:First, enter belt mass constant, belt width