Uniphos Tubes (Gastec Equivalent)

The Uniphos brand of detector tubes are used with the precision ASP-40 piston hand pump. The air sample is drawn through the narrow tube containing a specific gas sensing chemical causing a color change. The length of color stain gives the concentration which is read directly from the measurement scale printed on the tube. More than 250 different Uniphos Gas Detection Tubes are available for over 150 different chemicals and concentration ranges