By attaching a rotational detector to gear on a main rotational shaft of stirrer, blender, centrifuge and so on, the TM-4130 can output an analog signal to recorder in order to see the rotational fluctuation as well as measuring and indicating rotational speed of shaft.

Measurement range: approx. 1 r/min to 20,000 r/min

Rotation from low-speed at 0.05 r/min or less can be measured with rotary encoder as a rotational detector.