History: Oxygen Depletion Monitor
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r193878 · current
- Created Oxygen Depletion Monitor (part): "Sounds an alarm when boil-off from liquid nitrogen or a leak of argon or nitrogen lowers the oxygen level in the room. Fixed wall unit with a first alarm at 19.5% oxygen, audible and visual alarms, a relay output and a stated sensor life, mounted near the dewar and cylinders."