DEVICE

The present invention relates, in one aspect, to a medical device for sampling biological material comprising; (i) an elongate housing (12); (ii) a probe (15) for sampling the biological material slideably mounted within the elongate housing; and (iii) a current supply electrically coupled to the probe or elongate housing (12); wherein said elongate housing (12) and said probe (15) are made from materials having different Peltier potentials such that supply of current from the current supply generates a Peltier effect between said elongate housing and said probe. Furthermore, the invention relates to an assembly for housing, storing, and for transporting a medical device, wherein the receptacle comprises materials having different Peltier potentials.