Abstract: A fluid pump comprising one or more actuators, two end walls, a side wall; a cavity which, in use, contains fluid, the cavity having a substantially cylindrical shape bounded by the end walls and the side walls, at least two apertures through the cavity walls, at least one of which is a valved aperture, wherein the cavity radius, a, and height, h, satisfy the following inequalities: a/h is greater than 1.2; and h2/a is greater than 4×10?10 m; and wherein, in use, the actuator causes oscillatory motion of one or both end walls in a direction perpendicular to the plane of the end walls; whereby, in use, the axial oscillations of the end walls drive radial oscillations of fluid pressure in the cavity.

Abstract: A gas flow generator comprising: an ultrasonic driver comprising a piezoelectric or electrostrictive transducer mounted on a substrate, operation of the transducer being arranged to cause the driver to bend; a first membrane disposed on or formed integrally with the transducer or the substrate; and a second membrane mounted substantially parallel with the driver and spaced a given distance therefrom, one of the membranes being perforate, whereby ultrasonic bending of the driver on actuation of the transducer causes a gas flow through the perforate membrane.

Abstract: A fluid pump comprising one or more actuators, two end walls, a side wall; a cavity which, in use, contains fluid, the cavity having a substantially cylindrical shape bounded by the end walls and the side walls, at least two apertures through the cavity walls, at least one of which is a valved aperture, wherein the cavity radius, a, and height, h, satisfy the following inequalities: a/h is greater than 1.2; and h2/a is greater than 4×10?10 m; and wherein, in use, the actuator causes oscillatory motion of one or both end walls in a direction perpendicular to the plane of the end walls; whereby, in use, the axial oscillations of the end walls drive radial oscillations of fluid pressure in the cavity.

Abstract: A device for analysis of a sample, the device comprising: a first layer having a network of passages and chambers through which fluid is caused to flow during analysis; a second layer in which a plurality of chambers are formed, the chambers containing fluids for use in the analysis; an inlet in either the first or the second layer into which a sample to be analysed can, in use, be placed, and a third layer providing a frangible fluid seal between the chambers of the second layer and the network of the first layer so that, in use, a break in the third layer permits fluid from a chamber in the second layer to pass into the network of the first layer to enable analysis of the sample to be carried out.

Abstract: A single layer fluid routing device comprising a first channel having a cross-section of a first aspect ratio and a first depth; a second channel having a second cross-section of a second different aspect ratio and a second different depth; wherein the second channel intersects with the first channel from a first point to a second point, the first and second points having different offsets relative to the cross-section of the first channel.