The ZL-III Gate Upper and Lower Limit Controller (with dial pointer display master controller) is primarily used to set and control the travel limits of the test piece, achieving automatic control of its travel range. Through the reduction effect of the worm gear mechanism, it effectively improves control precision.

Due to its advantages such as simple structure, easy installation, stability, reliability, and the ability to arbitrarily set control points as needed, this controller is widely used in automatic control systems for water conservancy, electric power, machinery, chemical industry, textiles, food, scientific research, meteorology, and more.

II. Main Technical Parameters:

1. Speed ratio between input shaft and camshaft: 1:7.5, 1:16, 1:30, 1:64, 1:120, 1:256

2. Upper and lower limit control accuracy: ±3cm

3. Travel switch operating voltage: 220V

4. Travel switch operating current: 3A

5. Two travel switches with independent common points, normally open, and normally closed contacts (can be increased to 4 or 6 as needed)