Oxygen Deficiency Monitor
Model 221R

Price: $1,765.00

SHIPS NEXT BUSINESS DAY
up to 10 units
Orders placed after December 16th will ship on January 3rd.

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

Model 221R Remote viewModel 221R Close up

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.

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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.

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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.

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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.

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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.

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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

Physical & Eletrical Specifications
WEIGHTMOUNTINGGAS CONNECTIONSDigital Display
4.0 lbs
(1.8 kg)
Wall mountDiffusion screen. No pump, sample tubing or fittings required4-digit LCD (reads full scale from 0.0% to 25.0%)
POWEROUTPUTS
100 –240 VAC <115 Watts.
Battery back-up provides 1 hour of power
4 – 20 mA isolated output signal
Bi-directional RS485 communication
model-221r dimensions
2-year warranty for Parts & Labor for any defects in materials or workmanship. 2-year Warranty for zirconium oxide sensors.
Operational Specifications
Measurement RangeAMBIENT 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)
Monitor Performance Specifications
Minimum detection limit90% UPSCALE RESPONSE TIMES
FOR SPECIFIC RANGES
REPEATABILITYDiurnal Temperature SpecificationAPPROVALS
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 rangeUL 61010-1 for Safety Electrical Equipment
CE Marked, Designed to Meet IP65
Analyzer Key Features
TAMPER RESISTANT PRESET ALARMS
OSHA Preset Standard Alarms
  • Below 19.5% Oxygen Danger Level — Red warning light, 95 dB audible alarm, Relay 2 de-energized
  • Above 23.5% Oxygen Enriched Level — Red warning light, 95 dB audible alarm, Relay 1 & 2 de-energized
Additional Preset Alarm
  • Below 20.0% Oxygen Caution Level — Yellow caution light, Relay 1 de-energized
WASH DOWN READYDesigned to withstand direct water spray
SAFETY FEATURES
  • 1-hour rechargeable battery back-up
  • Tamper-resistant alarm setpoints
  • Front panel lock-out
  • Calibration error detection and alarm
ACCESSORIES
  • Remote Sensing Probe for monitoring up to 300 ft from control unit
  • Pre-wired Type B wall plug
COMMAND CENTER SOFTWAREIncluded Software, which provides access to advanced functions:
  • Calibration history
  • Alarm configurations
  • Data Log history of O2 measurements, power history
  • Security settings

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