Extech VB450 Vibration Meter Range 10 to 1500Hz measures vibration levels in industrial machinery and points out problems such as misalignment, poor balancing, structural compromises, etc. The Extech VB450 features a wide frequency range from 10Hz to 1500Hz, automatic hold, automatic shut off after one minute, low battery indication, and velocity (RMS), acceleration (peak), and displacement (peak-to-peak) measurements.