Model : DT-2230

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* Mini pocket size, easy carryout.

* Photo tach. : 5 to 100,000 RPM

　Contact tach. : 0.5 to 19,999 RPM.

　Surface speed : m/min, ft/min.

* Laser beam for Photo tachometer, long measuring distance.

* LCD display, RS-232 interface.

* Patented.

* DC 1.5V battery (UM-4, AAA) x 4.