Lock type sample holder is a simple and practical accessory for infrared spectrometer to test liquid samples, especially suitable for smear method and liquid film method. And it can be suitable for using two window panel sizes:Φ32mm andΦ25mm. The quotation for the lock type sample rack includes one bracket,Φ32mm middle sleeve,ΦA 25mm small set,ΦTwo 25x2-4mm potassium bromide window panels. Other infrared window elements such as sodium chloride, calcium fluoride, barium fluoride, zinc selenide, etc. can also be replaced or added according to customer requirements