New ambient air oxygen monitorThis new Series 500 microprocessor-based ambient air oxygen monitor features a nondepleting electrochemical sensor. The sensor eliminates false alarms due to sensor depletion. Click here to enlarge imageThe series' Sentry Circuit monitors the instrument's calibration against any system or condition changes. If those changes become significant, the Sentry Circuit triggers an alert.Other standard features of the Series 500 include built-in battery backup, dual adjustable oxygen alarm set points, 0-25% range, 1/2 in. liquid crystal display, built-in audible alarm, front panel oxygen alarm and power status indicator lights, and an open diffuser sensor th...

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