A fluid system comprising: a fluidic device comprising at least one fluidic chamber (202 a-c) and at least one fluidic channel connected to the fluidic chamber (202 a-c); a fluid control device connected to the fluidic device for controlling a flow of liquid in the fluidic device; and a membrane disposed at a degassing area of the fluidic device for removing gas contained in the liquid, wherein the membrane comprises a plurality of pores, wherein the membrane comprises two sides (302/304) with one side facing the liquid, wherein the fluid control device is configured to generate a positive pressure differential between the two sides (302/304) of the membrane when activated, and wherein the membrane is permeable to the gas contained in the fluidic device and is impermeable to the liquid in the fluidic device under the pressure differential, wherein the fluidic device is a microfluidic, wherein the fluid control device comprises a pressure sensor for measuring a pressure in the fluidic device for monitoring a pressure profile indicating the pressure in the fluidic device over time; and at least one pump connected to the fluidic device; and a feedback control for controlling the pressure based on the monitored pressure profile, wherein the feedback control comprises a controller configured to activate the pump for a time period whereby the pressure profile exhibits a substantially constant pressure in the fluidic device, and to deactivate the pump when the pressure profile exhibits an increase in pressure in the fluidic device; characterized in that the degassing area is disposed over an optical measurement chamber in an optical measurement zone, wherein the optical measurement chamber is one of the at least one fluidic chamber. a fluidic device comprising at least one fluidic chamber (202 a-c) and at least one fluidic channel connected to the fluidic chamber (202 a-c); a fluid control device connected to the fluidic device for controlling a flow of liquid in the fluidic device; and a membrane disposed at a degassing area of the fluidic device for removing gas contained in the liquid, wherein the membrane comprises a plurality of pores, wherein the membrane comprises two sides (302/304) with one side facing the liquid, wherein the fluid control device is configured to generate a positive pressure differential between the two sides (302/304) of the membrane when activated, and wherein the membrane is permeable to the gas contained in the fluidic device and is impermeable to the liquid in the fluidic device under the pressure differential, wherein the fluidic device is a microfluidic, wherein the fluid control device comprises a pressure sensor for measuring a pressure in the fluidic device for monitoring a pressure profile indicating the pressure in the fluidic device over time; and at least one pump connected to the fluidic device; and a feedback control for controlling the pressure based on the monitored pressure profile, wherein the feedback control comprises a controller configured to activate the pump for a time period whereby the pressure profile exhibits a substantially constant pressure in the fluidic device, and to deactivate the pump when the pressure profile exhibits an increase in pressure in the fluidic device; characterized in that the degassing area is disposed over an optical measurement chamber in an optical measurement zone, wherein the optical measurement chamber is one of the at least one fluidic chamber.