AMITTARI AT-135A Rotation speed stroboscopic meter

AMITTARI AT-135A Stroboscopic Rotation speed instrument, stroboscopic instrument, test range 50~12000FPM, Measurement accuracy +/- (0.05% n + 1d), Sampling time: 0.3 seconds, internal trigger/external trigger free conversion, external trigger signal amplitude TTL level, fast FM × 2, ÷ 2, high-low range convertible