Concentrator refers to the amount of a substance in a defined space. Concentration is especially used for concentrating or preparing sample in batches in laboratory. - Synchronously working with heating by dry bath in the bottom and nitrogen blowing on the surface accelerates liquid evaporation and sample concentration - The length of a standard gas needle is 150 mm - The height of the air chamber plate can be adjusted - The unique characteristics: Sample surface in the tube can be observed while concentrating