Special Features:

Single indicator for all common refrigerants; accurate color calibration at low ppm levels and high temp; solid copper connections; maximun working pressure 680 psig; sweat x sweat (odf)

Properties:

A tubular item of glass which may have reference and/or indicator markings which permits the visual examination of the amount of liquid in a tank or reservoir, pressure vessel, still, pipe tubing line and the like. is part of an indicator, sight, liquid.