With a Zirconia sensor, Oxygen levels and operation times can be recorded by the Gas Purge Monitor (GPM) at predetermined intervals for welding gas purging applications. For measuring moisture content in purge gas, an optional inline hygrometer sensor is available. Options include external warning beacon outputs and proportional outputs, as well as changeover relay contacts for clients’ own warning systems. Coloured indicators and user-programmable alarm limits provide clear indications of alarm status.