Oxygen Monitor for Biogas/ Process Monitoring is a single unit with built-in rotometer and pump and has built-in alarm "setoff" at preset limit. The Oxygen Monitor has operating temperature ranging from 20 ° C to 50 ° C. The Oxygen Monitor requires 15 seconds response time. The Oxygen Monitor for Biogas/ Process Monitoring has relative humidity ranging from 0 to 90% RH.