I'm looking to purchase an automated refill system for our dual trap dewar on the Gasbench. So far I haven't found many options other than Teragon of San Francisco. I would appreciate any suggestions, recommendations or comments. You can respond to me directly at [log in to unmask] Thanks! William Rugh, Manager Integrated Stable Isotope Research Facility US Environmental Protection Agency Western Ecology Division 200 SW 35th St. Corvallis OR 97333 541 754-4604 [log in to unmask]