This sample changer allows 30 sample cells to be placed at the same time. The temperature is controlled by Peltier elements and can be varied from 10 to 120 °C in less than 30 minutes. The gas tight sample cells are made of aluminum with nickel coating and windows are high quality thin mica sheets (~25 microns) which can be reused. Both liquid and gel type samples can be contained with aluminium or polycarbonate spacers defining the sample thickness. About 100 cells are available for parallel X-ray measurements, cleaning and sample loading.