The instrument adopts the coil spring takeup device with double constant force.

The tension of the wire rope is greater than 100N. It is suitable for the measuring range 0~16m.

There is a precise gear lead screw driving device in the interior of the instrument in which four travel switches can be installed.

The four travel switches correspond respectively with four controlling points within the measuring range.

The product is suitable for opening measuring and control of the plain batten gate, arclike gate, leaf gate, fast gate and the different valves.

Built-in automatic gate opening system