Gas Guardian

Built for Demanding Environments

Constructed from anodized aluminum and stainless steel, the Gas Guardian is compatible with all NARDI Pacific high-pressure compressors. It is available in two models:

• Fixed (wall-mounted)

• Portable (rugged suitcase enclosure)

This versatility makes it ideal for both permanent installations and field use.

 

Key Features

• Inlet pressure up to 6,100 psi (420 bar)

• Compact housing with modular sensor configuration

• Touchscreen interface with visual readouts and diagnostic data

• IoT-enabled for remote monitoring, data logging, and traceable performance records

• Customizable alerts and alarms, including compressor shutdown safety protocols

• Simple sensor calibration using supplied sample gas cylinders

• Optional sensors for additional gases, including helium

 

Smart Monitoring = Safer Operations

Gas Guardian continuously analyzes critical gas parameters:

• Carbon Monoxide (CO): 0–1000 ppm, alarm threshold: 5 ppm

• Carbon Dioxide (CO₂): 0–10,000 ppm, alarm threshold: 500 ppm

• Oxygen (O₂): 0–100%, with alarm configuration

• Volatile Organic Compounds (VOCs - Oil Vapor): 0–40 ppm

• Hydrogen Sulfide (H₂S): 0–100 ppm

• Water Vapor (Dew Point): +68°F to -103°F ADP (+20°C to -75°C)

• Helium (optional): 0–100%

 

The analyzer performs pressure stabilization at 725 psi (50 bar) for accurate sensor readings and validates flow conditions at 2 L/min to ensure sensor precision.

 

Standards Compliance

Calibrated to EN 12021, the most stringent international standard for breathable air, Gas Guardian also supports compliance with:

• CGA G-7.1 (Grade E) and NFPA 1989 (USA)

• CSA Z180.1 (Canada)

• AS/NZS 2299.1 / 1715 (Australia & New Zealand)

• JIS T 8155 (Japan)

• GB/T 31975 (China)

• IS 15879 / 10245 (India)

 

User-adjustable alarm thresholds allow customization to match local or site-specific standards.

 

Maintenance & Calibration

Routine calibration is fast and operator friendly. The system supports autonomous recalibration for O₂ and dew point, with other gases calibrated using supplied sample gas cylinders:

• Mixed gases for CO, CO₂, VOC

• Dedicated cylinders for O₂ and H₂S

• Flow rate: 2 L/min for accurate zero/span calibration

• Sensor lifespan ranges from 2 to 10 years depending on the gas type

 

Technical Specifications

• Max inlet pressure: 6,100 psi (420 bar)

• Operating temperature: 41°F to 113°F (+5°C to +45°C)

• Storage temperature: 14°F to 113°F (-10°C to +45°C)

• Operating humidity: 0–80% RH

• Power supply: 12/24 VDC

• Altitude limit: 6,562' (2,000 m)