500 cc of molecular sieve 5A in this metal purifier reduces moisture to less than 1 ppm at most instrument flow rates of 2 L/min. The Model 500 will remove water from over 20 standard cylinders of compressed air. The purifier can be regenerated by baking under helium flow at 200 deg. C for 4 hours, venting to the hood. Approximate dimensions: 2 in. x 14 in. with fittings. Maximum pressure is 1000 psig. It is shipped filled with high-purity helium. Packaged: 16-1/4 in. x 3-1/4 in. x 3 in. Cardboard Box; Weight: 1,383.5 g