Apparatus and method for controlled transport of microfluidic sample

An apparatus for simultaneously transporting a first and second microfluidic sample (501, 502) comprising: a substrate (120); a channel (130) formed in the substrate (120); a plurality of electrodes which are arranged at different positions along the channel (130); Photo sensors are respectively arranged between pairs of electrodes of adjacent electrodes along the channel and are adapted to measurements of the first and second microfluidic sample (501, 502) to perform; an evaluation unit (220) which is adapted to perform for the first and / or second microfluidic sample (501, 502) a speed detector and a temperature detector, wherein the temperature detection uses a time interval measurement to a change in volume of the first and / or second microfluidic sample (501, 502) to determine; and a control (160) for individual rules of voltage drops between the adjacent electrodes of the electrode pairs in dependence on measurement results for the detected speed and temperature.