Entech’s canisters feature a large volume capacity for detection of volatile chemicals down to the low part per trillion range. Losses in the valve are avoided by using our new TrueSeal valve which includes Entech’s new double-seal technology and low carryover, replaceable nickel ferrules. An integrated valve guard is securely welded to the canister for superior light-weight valve protection without any stresses to the valve stem associated with heavy “strapped-type” valve guards. These canisters are certified to meet or exceed the technical specifications required for EPA methods TO-14a and TO-15. High-quality performance is verified for EVERY canister with our demanding chemical inertness tests.