Big Trap
• Molecular sieve 5A provides high-efficiency drying
• Moisture indicators warn of leaks in the gas stream
• Cobalt- and phenolphthalein-free indicator is available

The Big Trap can also be used to purify hydrogen in flame ionization detectors. Maximum pressure is 100 psig. It has a 400 cc total volume of indicating Drierite® and molecular sieve 5A in a clear acrylic tube. The Drierite® changes from blue to pink at 5% relative humidity to warn of leaks in the gas stream. Our unique O-ring design allows hand-removal of the cartridge without disconnecting the fittings from the line, while a plastic insert at each end keeps the packing from spilling. 1/8'' fittings. Dimensions 2 1/4'' x 17'' including fittings.

The Gas Dry Purifier is a moisture and dust filter suitable for drying laboratory air or central air supplies. It has a high-strength polycarbonate body with aluminum endcaps and standard brass compression fittings. The filter is filled with molecular sieve and a silica-gel based moisture indicator that changes color in the presence of water.

Warning: 1) Moisture and dust filter only. Not for critical applications. 2) Use with non-hazardous gasses only. 3) Not for outside use.
For critical applications requiring very low moisture levels please see:
A) Z-Pure H2O Filter
B) Model 500