A microfluidic device (101, 501, 601) comprising: an inlet port (102, 502, 602, 702) for liquid, a capillary channel (103, 503, 603, 703, 903) suitable for metering a volume of liquid drawn therein by capillary action from the inlet port, while being in fluid connection to the inlet port for receiving liquid from the inlet port (102, 502, 602), said capillary channel having an inlet portion (104, 504, 604) connected to the inlet port, an outlet portion (105, 505, 605, 605') and a defined volume, at least one dissolvable valve (107, 110, 507, 607, 610, 610', 707, 710, 910) comprising a dissolvable membrane (108, 111) having a first side oriented towards the metering capillary channel, and capillary means (109, 712), connected to the second side of the dissolvable membrane such that when the membrane is dissolved by the liquid, liquid is transported through the valve to the second side of the membrane by capillary action, wherein the at least one dissolvable valve (107, 110, 507, 607, 710, 910) is in capillary connection to the outlet portion of the capillary channel (103, 503, 603, 703), and arranged for transporting a metered volume of liquid from the capillary channel (103, 503, 603, 703) when the membrane (111, 711) is dissolved, wherein the microfluidic device comprises a laminate of layers of material defining a capillary flow path for the liquid and comprising at least one layer of dissolvable material (117, 724) forming the at least one dissolvable membrane (108, 111), and wherein the microfluidic device comprises an air vent before each dissolvable membrane to allow for capillary filling of liquid up to the membrane. an inlet port (102, 502, 602, 702) for liquid, a capillary channel (103, 503, 603, 703, 903) suitable for metering a volume of liquid drawn therein by capillary action from the inlet port, while being in fluid connection to the inlet port for receiving liquid from the inlet port (102, 502, 602), said capillary channel having an inlet portion (104, 504, 604) connected to the inlet port, an outlet portion (105, 505, 605, 605') and a defined volume, at least one dissolvable valve (107, 110, 507, 607, 610, 610', 707, 710, 910) comprising a dissolvable membrane (108, 111) having a first side oriented towards the metering capillary channel, and capillary means (109, 712), connected to the second side of the dissolvable membrane such that when the membrane is dissolved by the liquid, liquid is transported through the valve to the second side of the membrane by capillary action, wherein the at least one dissolvable valve (107, 110, 507, 607, 710, 910) is in capillary connection to the outlet portion of the capillary channel (103, 503, 603, 703), and arranged for transporting a metered volume of liquid from the capillary channel (103, 503, 603, 703) when the membrane (111, 711) is dissolved, wherein the microfluidic device comprises a laminate of layers of material defining a capillary flow path for the liquid and comprising at least one layer of dissolvable material (117, 724) forming the at least one dissolvable membrane (108, 111), and wherein the microfluidic device comprises an air vent before each dissolvable membrane to allow for capillary filling of liquid up to the membrane.