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Acme’s standard Oxygen Deficiency Monitor is the Model 221R. This rugged piece of safety equipment is outfitted with a complete package of electronic features, including an oxygen deficiency alarm, a compact watertight NEMA 4X enclosure, and an accurate, reliable, 10-year life zirconium oxide sensor.

Additional Features Measurement Range: 0-25%|Red Backlit Digital Display: High resolution 3 ½ digit LCD. Reads full scale from 00.0% to 25.0%|Alarms: Two fully adjustable oxygen concentration alarms. Preset for OSHA standards, 20.0% Caution and 19.5% Danger. Dry contacts 3 A. @24VDC/115VAC|Status LED: Indicates Power, Safe Operation, Alarm Conditions and Loss of AC power|Danger Alarm: 95dB danger alarm preset for 19.5%|Battery Back-up: One hour|Analog Output Signal: Isolated 4-20mA|Data Logger: Logs data for 15 days @ one minute intervals, 30 days @ two minute intervals, etc.|Communications: RS-485 bi-directional|Power Requirements: 115 VAC< 10 watts|Repeatability: +/-0.1% of range or +/-0.1% of oxygen, whichever is greater|Operating Temperature Range: 0°-130°F|Diurnal Temperature Specification: < ±1% of scale over temperature range|90% Full Scale Response Times for Specified Range: 0-25% < 12 seconds|Long Life Zirconium Oxide Sensor: 10 year life expectancy|Weather Tight NEMA 4X Package|Area Classification: Designed to meet General Purpose UL 61010-1 standard and IP 65 requirements. Approval pending.|Gas Connection: Diffusion screen. No pump or fittings required|Mounting: Wall mount or 2.0” pipe mount|Dimensions: 7.0″ W x 5.7″ H x 4.5″ D|Weight: 4 lbs|The Model 221R is a rugged piece of safety equipment designed for industrial applications.
Product Type Alarms & Monitors