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RKI OX-600 Alkaline Oxygen Detector

RKI Instruments

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Product Overview

Stand Alone Alkaline Oxygen Deficiency Monitor

Low-profile design equipped with a unique tri-color display, which changes color as oxygen levels reach each alarm level.


  • Operates with or without a controller
  • Range of 0-25.0 % volume with 0.1% increments
  • Tri-color visual alarm display
  • 2 preset alarms; Green=Normal, Yellow=Alarm 1, Red=Alarm 2
  • Large easy to read digital display
  • Uses 2 AA alkaline
  • Operates up to 1 year on one set of AA alkaline batteries
  • Pressure compensation eliminates false alarms caused by pressure change
  • Remote mount sensor cable available




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  • 4
    RKI OX600 as a O2 Depletion Monitor

    Posted by Michael Wright on Jun 2nd 2021

    When sold as a room or space depletion monitor the unit works great. Still wondering if the cell has issues with other gases or chemicals. I maintain about 15 units with different customers, sometimes during quarterly calibrations I'll find a unit unplugged and Staff will let me know it kept going into alarm condition. When the unit is powered back up and calibrated, it calibrates like no issues. Some new cells don't last as long as others in the field. I like the size and ease of maintenance. Just need a more stable cell and longer lasting cell. We're getting about 2.5 years on each. Cost of a new cell should get a longer life. That 2.5 years is with quarterly cals. Life spam seems to shorten with fewer cals.