Oxygen Deficiency Monitor
Model 221R
Price: $1,765.00
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up to 10 units
Pricing shown is for North America only. For other regions, contact your local distributor or AMI for pricing.
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DESIGNED FOR SAFETY
The AMI MODEL 221R is the gold standard for oxygen deficiency & confined space oxygen monitoring. It is used by the thousands in US Government Laboratories, Space Agencies, Universities and a broad range of industries to ensure the safety of personnel. The MODEL 221R provides an incredibly accurate and stable reading over a wide temperature range (0-130°F) and is not affected by changes in barometric pressure. This analyzer is virtually maintenance-free with its unique oxygen sensor delivering a 10-year life expectancy.
Note that the MODEL 221R should not be used in areas where Flammable Gases may be present.
Features & Benefits
Special Safety Features
Rechargeable battery backup with low power alarm, tamper-resistant alarm setpoints to prevent user override, calibrations error detection, and front panel lock-out.
Special Safety Features
The MODEL 221R is certified by a 3rd party testing lab to meets UL 61010-1 Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use.
Washdown-Ready Metal Enclosure
The powder-coated aluminum enclosure of the Analyzer is designed to provide protection against ingress of dust and water from low pressure spray. Design protects analyzers in difficult industrial environments and allows for low pressure washdown of the unit.
Audible Alarms & Relays
Detection of an Oxygen-Deficient environment will trigger a 95 dB alarm to warn of danger. Additionally, includes relays for triggering safety beacons or exhaust fans.
Audible Alarms & Relays
Alarms are preset to oxygen levels mandated by OSHA. Normal ambient atmosphere has an oxygen concentration of 20.9%. The OSHA Respiratory Protection Standard 29 CFR 1910.134 states 19.5 percent oxygen as the level below which an oxygen-deficient atmosphere exists and requires, generally, that all oxygen-deficient atmospheres be considered immediately dangerous to life or health.
10-Year Sensor Life
The Zirconium Oxide Sensor provides up to 10-years of operational life while only requiring simple, periodic calibration. Detection technology is IDEAL for monitoring oxygen safety levels. Maintains accuracy over wide temperature range and not affected by changes in barometric pressure.
10-Year Sensor Life
AMI's zirconium oxide sensors provide the best option for monitoring oxygen levels in inert atmospheres due to their stability, limited maintenance and up to 10 years of service life. Electrochemical O2 sensors require regular calibration and replacement, making them less suitable for oxygen deficiency monitoring.
Optional Remote Probe
Allows monitoring of locations away from the control unit. Comes standard with a 12 ft (3.6m) cable but can be extended by the customer up to 300 ft (91.4m).
Technical Specifications
| WEIGHT | MOUNTING | GAS CONNECTIONS | Digital Display |
| 4.0 lbs (1.8 kg) | Wall mount | Diffusion screen. No pump, sample tubing or fittings required | 4-digit LCD (reads full scale from 0.0% to 25.0%) |
| POWER | OUTPUTS |
| 100 –240 VAC <115 Watts. Battery back-up provides 1 hour of power | 4 – 20 mA isolated output signal Bi-directional RS485 communication |
| Measurement Range | AMBIENT OPERATIONAL TEMPERATURE range | Method of Measurement |
| 0 –25.0% | +14°F to +122°F (-10°C to +50°C) | Zirconium Oxide Sensor (10-year life expectancy) |
| Minimum detection limit | 90% UPSCALE RESPONSE TIMES FOR SPECIFIC RANGES | REPEATABILITY | Diurnal Temperature Specification | APPROVALS |
| 0.05% of Oxygen | <12 sec for 0.0% – 25.0% | ±0.1% of range or ±0.1% of oxygen whichever is greater | <±1% of scale over temperature range | UL 61010-1 for Safety Electrical Equipment CE Marked, Designed to Meet IP65 |
| TAMPER RESISTANT PRESET ALARMS | OSHA Preset Standard Alarms
Additional Preset Alarm
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| WASH DOWN READY | Designed to withstand direct water spray |
| SAFETY FEATURES |
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| ACCESSORIES |
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| COMMAND CENTER SOFTWARE | Included Software, which provides access to advanced functions:
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Available Accessories
Power Cord
Power Cord
Power Cord
Model 221R Downloads
- Data Sheetmodel-221r-data-sheet.pdf (3.2 MB)
- Operator Manualmodel-221r-operator-manual.pdf (711 KB)
- More Downloads
Industry Applications
