The fastest, most economical method of performing on-site analyses of specific gases. Revolutionary precision sampling pump draws a 50-mL sample of air (or other gas mixture) through a calibrated, glass gas detector tube. Contact with a specific gas causes a color change inside the gas detector tube, which enables the user to read the concentration of the gas directly from the wall of the tube. The entire test can be accomplished in less than a minute with accuracy that rivals gas chromatography! Pump comes with detector tube activator and soft carrying case. Order gas detector tubes separately.