Advanced Micro Instruments, Inc. (AMI) products

The Model 221R has become the standard oxygen deficiency monitor throughout the US market. It is used by the thousands in government labs, universities, and industry, anywhere there is a possibility of asphyxiation due to leakage of compressed or liquefied inert gases like nitrogen, argon or carbon dioxide.

The AMI MODEL 221R has become the gold standard for oxygen deficiency & confined space monitoring throughout the US market. It is used by the thousands in US Government Laboratories, Space Agencies, Universities, and a broad range of industries, ensuring the safety of personnel. The MODEL 221R is designed for use in NON-FLAMMABLE applications and provides an incredibly accurate and stable reading over a broad temperature range (0-130°F). The Analyzer is virtually maintenance-free with its unique oxygen sensor delivering a 10-year life expectancy.