GfG Cardon Dioxide Sensor Transmitter

The GfG IR22D gas transmitter is a fixed detection solution designed for continuous monitoring of carbon dioxide (CO₂) and flammable gases in non-hazardous environments.

Using proven infrared (NDIR) sensing technology, the IR22D delivers highly stable, accurate CO₂ measurement across a wide range—from ppm-level indoor air quality monitoring through to high-volume industrial applications.

CO₂ is colourless, odourless, and cannot be detected by human senses—making continuous monitoring essential wherever it is stored, used, or generated.

Ideal for CO₂ Monitoring Applications
The IR22D is well suited to a broad range of CO₂-focused applications, including:

Building & Indoor Air Quality

• HVAC systems and demand-controlled ventilation
• Offices, schools, and public buildings
• Hospitals and healthcare environments
• Conference rooms and high-occupancy spaces

Food, Beverage & Refrigeration

• Breweries, wineries, and beverage dispensing systems
• CO₂ storage and cylinder rooms
• Cold storage and food processing facilities
• Supermarkets and hospitality environments

Industrial & Utility Applications

• Laboratories and research facilities
• Dry ice storage and handling areas
• Wastewater and biogas facilities
• Manufacturing and process environments
• Accurate, Stable Infrared Detection

The IR22D uses non-dispersive infrared (NDIR) technology, which measures CO₂ based on light absorption—delivering:

• High accuracy and repeatability
• Minimal cross-sensitivity to other gases
• Stable performance in varying environmental conditions
• Long sensor life (>5 years) with low maintenance

This makes it ideal for both life safety monitoring and process control applications.

Designed for System Integration
The IR22D integrates easily into modern control systems, supporting:

• 4–20 mA analog output
• RS-485 Modbus communication
• Compatibility with BMS, PLC, and SCADA systems

This enables automated responses such as ventilation control, alarm activation, and safety shutdowns—critical for compliance and operational continuity.

• Clear Local Indication & Alarm Response
• 2.2” colour display showing real-time CO₂ levels
• Visual alarm indication (red backlight)
• Integrated audible buzzer for immediate local warning

This ensures fast on-site awareness of elevated CO₂ levels before central systems respond.

• Robust, Low-Maintenance Design
• IP54-rated enclosure for plant rooms and service areas
• Automatic temperature compensation for stable readings
• Signal linearisation for improved accuracy
• Long-life infrared sensor reduces servicing requirements

The IR22D is designed for reliable operation in both building services and industrial environments.

Key Features

• Continuous CO₂ monitoring using infrared (NDIR) technology
• Wide measurement range (ppm to % volume)
• Long sensor life (>5 years) for low lifecycle cost
• BMS/PLC/SCADA integration: 4–20 mA and Modbus
• Local display with visual and audible alarms
• Automatic temperature compensation and signal stability
• SIL-capable hardware for safety-critical applications
• IP54 enclosure with optional weather protection