This kymograph is designed for recording mechanicalactivities of animal tissues in the physiological, pharmacological andbiological experiments conducted by medical and pharmaceutical colleges orresearch institutes. It is cabinet, portable, solid, and durable, and runsnoiselessly, steadily, reliably and reassuring. It can also shift rotationalspeed in a large range. The instrument is simply assembled and convenient to servicing. It can be assembled with a passive drum for being used as a two-drum kymograph.