Fast efficient sample concentration suitable for a variety of tube controlled by PID with high precise temperature. The gas delivery needles are independent, which could control gas separately to ensure sample concentration a good uniformity. The height of the sample concentrators gas reservoir is located on an adjustable stand for accurate height control. This flexible combination of blocks makes the instrument compatible with most sample vessels. FEATURES ·Independent needles avoid cross contamination ·Every gas volume adjustable ·Needles can work combined or alone ·Convenient to adjust gas for samples ·Accurate temperature, large temperature range, easy to calibrate ·Safe to use due to the height adjustable stand ·Stand rod with scale for accurate height control