Illinois Instruments Model 913 Oxygen Analyzer

Illinois Instruments Model 913 Wall-Mounted Industrial Oxygen Analyzer

The Illinois Instruments / Systech Illinois Model 913 Oxygen Analyzer is a rugged, industrial-grade process monitoring instrument engineered for continuous measurement of oxygen concentrations in gas streams, process chambers, and industrial safety environments. Utilizing a high-precision electrochemical sensor, the Model 913 delivers accurate, drift-free oxygen detection across wide percentage ranges (typically 0.1% to 100% O2). Housed in a durable, NEMA 4X / IP66-rated wall-mounting enclosure, this analyzer is built to withstand harsh plant conditions, ambient humidity, and chemical exposure. Featuring an intuitive digital display, adjustable dual alarm relays, and standard 4-20 mA analog signal output, the Model 913 seamlessly integrates into facility PLC network systems and supervisory control architectures for automated process regulation and safety monitoring.

Technical Performance & Structural Attributes

• High-Precision Electrochemical Cell: Advanced galvanic fuel cell technology provides fast response times, high specificity to oxygen, and linear output without interference from background gases like nitrogen or carbon dioxide.
• NEMA 4X / IP66 Weatherproof Enclosure: Heavy-duty wall-mount housing protects sensitive internal electronics from dust ingress, water spray, and aggressive industrial atmospheres.
• Dual Fully Adjustable Alarm Relays: Features user-configurable high/low threshold alarms with dry contact relay outputs for triggering external sirens, exhaust fans, or emergency shut-off valves.
• Isolated 4-20 mA Analog Output: Transmits real-time oxygen concentration measurements directly to facility SCADA systems, chart recorders, or process controllers over long distances.
• User-Friendly Front Control Panel: Bright digital display accompanied by front-panel calibration potentiometers allows straightforward zero and span adjustments using ambient air or certified calibration gas.

Product Specifications

• Model / Part Number: Model 913
• Primary Manufacturer: Illinois Instruments / Systech Illinois (AMETEK Process Instruments)
• Equipment Category: Process Gas Oxygen Analyzer
• Sensor Type: Long-Life Galvanic Electrochemical Fuel Cell
• Measurement Range: 0.1% to 100% O2 (Auto-Ranging or Fixed Range options)
• Display Resolution: 0.1% O2
• Accuracy: ±2% of reading at constant temperature and pressure
• Response Time (T90): Less than 15 seconds
• Analog Signal Output: 4-20 mA DC (Isolated)
• Relay Contacts: Dual Alarm Relays (SPDT, 5A at 250V AC)
• Enclosure Rating: NEMA 4X / IP66 Wall-Mount Assembly
• Operating Temperature Range: 0 to 45 degrees C (32 to 113 degrees F)
• Power Requirements: 110/220 V AC, 50/60 Hz or 24 V DC option

Key Benefits & Applications

• Industrial Gas & Inerting Systems: Monitors oxygen purity and nitrogen blanketing levels in storage tanks, chemical reactors, and gas generation plants.
• Facility Safety & Workplace Monitoring: Ensures ambient air quality and prevents oxygen depletion or enrichment hazards in enclosed gas storage rooms and laboratories.
• Food Packaging & Modified Atmosphere Storage: Validates low oxygen concentrations in bulk food storage facilities and MAP flush lines to preserve product shelf life.

Used, tested to be in great working condition.

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