Oxygen meter for waste water treatment lagoons - suitable for extended outdoor application in rough conditions

摘要

In an appts. for measuring O2 concns. in waste water tanks, over long periods in the open air, having an electrode, a signal converter and and indicator, the electrode is a conventional O2-electrode which is not armoured for rugged operating conditions. The electrode, signal converter and indicator are united inside a rod shaped housing comprising shaft, combination flange and hood. The oxygen indicator withstands rough conditions, even when frequent calibration is required, yet comprises comparatively inexpensive components.