MICROFLUIDIC LIQUID SAMPLING DEVICE AND METHOD OF COLLECTING A LIQUID SAMPLE

• Main Authors: DIEBOLD, Michael, RIESTER, Markus
• Format: Patent
• Language: English; French; German
• Published: 14.08.2024
• Subjects: ACTUATING-FLOATS; BLASTING; CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE; COCKS; DEVICES FOR VENTING OR AERATING; DIAGNOSIS; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; LIGHTING; MECHANICAL ENGINEERING; MEDICAL OR VETERINARY SCIENCE; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SURGERY; TAPS; THERMAL INSULATION IN GENERAL; TRANSPORTING; VALVES; WEAPONS

The invention relates to a liquid sampling device (100) comprising a support structure (106) having a liquid reception interface (130) that is in fluid communication with a reservoir chamber (134) and a microfluidic valve (136), the microfluidic valve (136) being connected to a measuring chamber (138). The liquid reception interface (130), the reservoir chamber (134) and the microfluidic valve (136) are configured to allow liquid entering the liquid reception interface to flow into the reservoir chamber (134) while being prevented from passing the microfluidic valve (136) unless a predetermined static pressure difference over the microfluidic valve (136) is exceeded. The microfluidic valve (136) is a passive valve without moving parts. Passing of liquid through the microfluidic valve is controlled by a static pressure difference over the microfluidic valve (136). The reservoir chamber (134) is configured and arranged to cause high enough a static pressure at an entrance side of the microfluidic valve (136) that causes a flow of liquid through the microfluidic valve (136) into the measuring chamber (138) once the reservoir chamber (134) is completely filled.