(Water-bathing Constant table) is a kind of kiochemistry instruments which combines water-bathing through whose temperature can be controlled with vibrator. Temperature-control uses intellectual ability synthesic wire,designs non drift,LED show. The digital can directly be seen precistly. The series of products are widely used in the labs,suchas plant,mcirobiology,enviroument-protecting,sanitation and anti-epedemic,food-entineering.