Abstract: A blood donation monitoring means comprising a support platform (12), being rockably supported by a support (18), a drive means (37, 39, 40) supported operatively connected to the support platform (12) to cause a rocking of the support platform (12), a weight sensing means (23) associated with the support for the support platform, a flow line support (16) adapted to receive a flow line for a receptacle to be supported on the support platform (12), the flow line support (16) including a flow control means (42) to control the flow through the control line, a control means operatively connected to the flow control means (16) and having an input from the weight sensing means (23), said control means having a monitoring means which is adapted to monitor the rate of change of weight of the contents of the support platform (12) and activate the flow control means (16) in accordance with the weight changes of the contents of the support platform (12) and ensure delivery of a predetermined quantity of blood to the rec

Abstract: A mixer comprising a platform (12) which is configured to be able to support a receptacle containing a quantity of liquid. The platform (12) being supported from a base (18) to be pivotable about a first axis and a second axis where the first and second axes are perpendicular to each other, a drive motor (37, 39, 40 and 42) provided between the base (18) and the platform (12) to cause joint pivotable movement of the platform (12) about both the first and second axes to effect a rocking action of the platform (12). A particular application of the invention relates to a device which can be used during blood collection to facilitate both mixing and quantity measurement of the blood being collected.