Ace Glass 7395-18 Gas Collecting Bulb, Ace-Thred, Bulb Only, 250 ml

Designed with #7 Ace-Thred end valves that ensure a tight fit without grease. No stopcock plugs to pop out. Nylon bushing tightens into the internally threaded glass to form an O-Ring compression seal. Operation is simple. With bushings at fingertip tightness, push plungers into bulb until flow holes are inside O-Rings (enlarged end of plunger acts as an automatic stop). Valves are now open and ready for flush sampling. When sampling is complete, and with bushing still at finger tip tightness, pull plungers out so flow holes are outside O-Rings. Valves are now closed. Bushings can then be tightened more for handling until ready to analyze. A bulge is built on the small end of the plunger to help guard against complete pullout. Each bulb has a side syringe sampling port, with two bushings, two FETFE O-Rings, and one septum. Plungers are supplied with hose connections. Complete item consists of bulb with two bushings, two FETFE O-Rings, one septum, and two plungers.