4
8
9
11
STAINLESS STEEL CANISTERS
OPERATING PRINCIPLE
•The canister vacuum pulls the air
sample without the use of batteries or AC power.
•Flow restrictors maintain flow stability over the desired time period from < 1 minute to 12 hours.
•Pressure gauge allows for  monitoring the flow.
•Summa canisters
(highly inert inner surfaces)
–evacuate in lab, open in field to collect sample.
reaction mass
mainly for outdoor environmental sampling.
12
STAINLESS STEEL CANISTERS NEW TYPES AND APPLICATIONS
•Technology has now been optimized for
personal sampling using smaller canisters with a volume of 400 ml or 1 L.
14
•Air Storage Devices —Sampling with sampling bag (1) -Advantages
‧simple, known volume, lightweight.
-Disadvantages
‧no stabilization (oxidation, reaction).‧losses on walls of bag. ‧losses in pump.
‧losses in line connecting pump to bag.‧leaks.Active Methods -Gases & Vapors
pump Air in Air bag
17Air Storage Devices —Sampling with sampling bag (2)•Avoiding contact of pump and transfer lines with contaminants
air
air
pump pump
18
強化箱體設計，氣密佳，

版权声明：本站内容均来自互联网，仅供演示用，请勿用于商业和其他非法用途。如果侵犯了您的权益请与我们联系QQ:729038198，我们将在24小时内删除。