Abstract: The invention comprises an assembly of an integrated vessel transporter (ITV) and at least one reaction vessel adapted to hold a chemical substance. The IVT is adapted transport the vessel from a first station to a second station in an automated laboratory system. The IVT comprises conditioning means for conditioning at least one physical quantity of the substance. Further, the IVT comprises sensing means for sensing the at least one physical quantity. Still further, the conditioning means can be at least partly controlled by the sensing means. The conditioning means can comprise a stirrer, such as a contactless magnetic stirrer, and temperature conditioning means, comprising a heater and a heat sink. The temperature conditioning means can be controlled by a temperature sensor comprised in the stirrer.