... motor 4.132*132 LCD touch Autosampler 500A is a high-precision dispensing equipment, it has the following advantages: non-valve design ... rate; controlled by step motor, high-precison,it will not be influenced by liquid viscosity; With the Ceramic component, very resistant to ... maintenance; 132*132 LCD touch, Key operation, easy to use; With AC DC power adapter, simple connection of the wire. Technical ...