英国牛津仪器公司研制了一种用于光谱测定的连续流式低温恒温器,该装置不中断冷却循环便能更换试样。这种型号为CF204的低温恒温器使用液氦来达到室温和3.5之间的温度。低温恒温器的主要特征是,由于静态的或动态的交换气体可以包围试样,因而排除了本来不良的导热体的冷却问题。另外,也能使试样导冷和使试样空间抽空。CF204配备于最新式的商业光谱仪,并装有一个低温线性温度传感器和能够保证5至10 Oxford Instruments UK has developed a continuous flow cryogenic thermostat for spectrometry that replaces the cooling cycle to change samples. This type of CF204 cryostat uses liquid helium to reach temperatures between room temperature and 3.5. The main feature of the cryostat is that the problem of cooling the otherwise poor thermal conductor is eliminated because the static or dynamic exchange gas can surround the sample. In addition, it is also possible to cool the sample and evacuate the sample space. CF204 equipped with the latest commercial spectrometer, and equipped with a low temperature linear temperature sensor and can guarantee 5 to 10