CR peristaltic pump LG350M is a liquid constant transfer pump. that can run with KZ50 pump heads, with flow rate from 10-33000 ml/min. Flow speeds can be adjusted either by hand through switching knobs, instead of the traditional way of membrane keypad, which reduces obviously the failure rate, or by automatic control through the external controller interface, with three available modes: 0-5V, 0-10V, and 4-20mA. Memory function is also available in the product in case of power off. Besides, switching knobs are designed clearly so that it is easy to operate for customers.