Trace-nitrogen-in-argon analyzer

The Series 1200 analyzer from GOW-MAC Instrument Co. (www.gow-mac.com) is designed to measure trace amounts of nitrogen in argon. Model 1200-A covers 0-2/0-20 parts-per-million (ppm) and Model 1200-B covers 0-20/0-200 ppm. Detection is based on spectral emission of argon plasma. The company says it guarantees the analyzers to sensitivity of 10 partsper-billion for nitrogen.