1. Overview DB-30 Type Power-driven Gauge Length Meter (Power-driven Striking Point Machine) is the special equipment which is designed and made according to stipulation in national standard GB/T228-2002 . This machine adopts high-precision ball screw to locate correctly and uses import transducer to collecting rotation signal to drive high-frequency electromagnet to strike point synchronously. Gauge length is correct, high-efficient and easy to operate. It’s the necessary matching equipment for labs. 2. Main technical parameters: Max. gauge length: 300mm Interval: 5mm or 10mm (adjustable) Power source: 220V, 50HZ Power of motor: 10W Outline size: 460mm*315mm*450mm Weight: 25Kg