Modern microfluidic Lab-On-Chip (LOC) combines microelectronic technology with advanced procedures from biochemistry, pharmacy and other areas. Along with size reduction of LOC systems, the need for precise measurement of small liquid flows is increasing.
Concise overview of approaches to small (< 1 ml/min) liquid flow measurement in LOC systems is given, as well as their realizations. Development of optical flow rate measurement device is presented. Single measurement and continuous operation methods are taken into consideration. Accuracy of the device using both methods is evaluated.
An interface for simple setting, measurement and calibration of the described measurement device was programmed on a PC. It was was used in development of an automated micropump characterization system software with frequency and amplitude sweep as well as flow and pressure logging.