光电式转速计 台湾路昌 DT-2234BL
Contact Tach. -0.5 to 19,999 RPM Surface speed m/min: 0.5 to 19,999.9 m/min 0.2 to 6,560 ft/min Quartz crystal, .19 MHz Last, Max. Min Value 尺寸: 208×72×37mm(2×2.8×1.5 inch)
(可远至2米距离测量)