Abstract: An inhaler for dispensing droplets of liquid medicament to a patient comprising a body having a mouthpiece or nasal adaptor and a reservoir of liquid medicament in communication with an aerosol generator. The aerosol generator includes a chamber for the liquid medicament and a nozzle arrangement having a plurality of orifices. Means are provided for cyclically pressurizing the liquid medicament in the chamber such that liquid from the chamber is periodically expelled through the orifices of the nozzle arrangement as atomizer droplets of liquid medicament. Dosage control means are also provided for deactivating the aerosol generator after a predetermined time or after a predetermined volume of liquid medicament has been expelled from the chamber.

Abstract: A spectrophotometer using a charge coupled device array as an image receiver characterised in that an image of its entrance slit is tilted with respect to columns of pixels in the charge coupled device array and in which the height of the image of the entrance slit on the charge coupled device array is arranged to extend over two or more rows of pixels so that the image of the entrance slit is skewed over pixels in two adjacent columns. Means are provided to analyse the output of the pixels to provide information on the intensity distribution of each spectral line with respect to wavelength having a resolution greater than that of the pitch of the pixels in each row of the charge coupled device array.