A sweat monitoring system comprising: a sensor for sensing sweat droplets; and an apparatus for transporting sweat droplets to the sensor, the apparatus comprising: a plurality of chambers, each of the chambers having an inlet for receiving sweat from the skin, and an outlet arranged such that a sweat droplet forms and protrudes therefrom following filling of the chamber with sweat; and a fluid transport assembly arranged to release each sweat droplet protruding from the outlets and transport each said released sweat droplet to the sensor, the respective outlet being thereby made available for a subsequent sweat droplet to form and protrude therefrom upon further filling of the respective chamber, wherein the fluid transport assembly is arranged to transport the released sweat droplet at least as fast as the subsequent sweat droplet protrudes from the respective outlet such that the sweat droplets from the same chamber do not contact each other, and wherein the sensor comprises a channel which is dimensioned such that each sweat droplet passing through the channel forms a meniscus at its head and tail spanning the cross-section of the channel. a sensor for sensing sweat droplets; and an apparatus for transporting sweat droplets to the sensor, the apparatus comprising: a plurality of chambers, each of the chambers having an inlet for receiving sweat from the skin, and an outlet arranged such that a sweat droplet forms and protrudes therefrom following filling of the chamber with sweat; and a fluid transport assembly arranged to release each sweat droplet protruding from the outlets and transport each said released sweat droplet to the sensor, the respective outlet being thereby made available for a subsequent sweat droplet to form and protrude therefrom upon further filling of the respective chamber, wherein the fluid transport assembly is arranged to transport the released sweat droplet at least as fast as the subsequent sweat droplet protrudes from the respective outlet such that the sweat droplets from the same chamber do not contact each other, and wherein the sensor comprises a channel which is dimensioned such that each sweat droplet passing through the channel forms a meniscus at its head and tail spanning the cross-section of the channel. a plurality of chambers, each of the chambers having an inlet for receiving sweat from the skin, and an outlet arranged such that a sweat droplet forms and protrudes therefrom following filling of the chamber with sweat; and a fluid transport assembly arranged to release each sweat droplet protruding from the outlets and transport each said released sweat droplet to the sensor, the respective outlet being thereby made available for a subsequent sweat droplet to form and protrude therefrom upon further filling of the respective chamber, wherein the fluid transport assembly is arranged to transport the released sweat droplet at least as fast as the subsequent sweat droplet protrudes from the respective outlet such that the sweat droplets from the same chamber do not contact each other, and wherein the sensor comprises a channel which is dimensioned such that each sweat droplet passing through the channel forms a meniscus at its head and tail spanning the cross-section of the channel.