A polyvinylidene fluoride (PVDF) micro-sensor channel with integrated gold wires was developed and manufactured by ultrasonic hot embossing and welding. The sensor channel was employed to detect the slug length distribution in a liquid-liquid Taylor-flow by conductivity measurements. The sensor channel was also tested regarding its usability for the detection of blockages by hot wire anemometry. (C) 2012 Elsevier B.V. All rights reserved.