The LH and DLH stirrers are a successful synthesis for the analytical requirements with use of high viscosity liquids, thanks to its high torque. The dynamic and powerful engine, ruggedness and tested, is controlled by a microprocessor that maintains a constant speed even under varying viscosity stirred liquid. A security system protects the instrument against overload in case of malfunction or engine block. The safety chuck without key and the technologies adopted ensure operational reliability, ease of use, with maximum utilization of space and reduced weight. DLH has two digital display indicating, in easily visible mode, the actual speed and the set speed. With rod support (ref. 043-111300), the double nut (ref. 043-111301) and clamp bracket (ref. 043-111302) are not included. Nor stirring rods listed below are included.