Vasthi Portable Hydrogen Purity Gas Analyzer Model VHP- 200 is a light weight, easy to handle, battery-powered analyzer, used to verify measurements and for spot-checking when other methods provide questionable results. Portable Hydrogen gas analyzers are microprocessor –controlled instrument with sophisticated software process that meets the needs of industry in analyzing the Gas with accuracy and reliability. Hydrogen Purity analyzer TCD transducer provides highly stable and reliable results.