Overview
The Danfoss 148H6072 GDC Basic gas detection unit is a digital infrared sensor designed to monitor and alert on hazardous CO₂ (R744) refrigerant concentrations in HVAC and centralized refrigeration systems. Factory-calibrated and pre-configured, the unit eliminates complex field setup while ensuring precise, repeatable measurements across the 0–20,000 ppm range. Danfoss 148H6072 connects via RS485 fieldbus (Modbus) to a central GDC controller, enabling continuous monitoring, wire-break detection, and integrated alarm management across multiple sensor points.
Key Features
- Infrared Sensor Technology: CO₂ detection, 0–20,000 ppm range
- Factory-Calibrated Digital Output: Precise readings with digital, factory-calibrated sensors, reducing the risk of false alarms
- RS485 Fieldbus Communication: Communication with the controller takes place via the RS 485 fieldbus interface
- Integral Wire-Break Monitoring: Potential wire breaks or wire interruptions in the alarm device loop will be detected immediately and reported to the central control
- Compact Design: Approx. 0.3 kg (0.8 lbs.)
- Modular System: Connect these units to a central system via Analog or RS485 open Modbus communications for comprehensive monitoring
Technical Specifications
- Sensor Type: Infrared
- Refrigerant Detected: CO₂ (R744)
- Measurement Range: 0–20,000 ppm
- Operating Temperature: −40 to +50°C (−40 to 122°F)
- Output Current: 5 V DC, 250 mA max., overload, short-circuit and reverse-polarity protected
- Weight: Approx. 0.3 kg (0.8 lbs.)
- Communication: RS485 fieldbus (Modbus)
- Supply Voltage: 16 V DC minimum
- Calibration: Digital interface, factory pre-calibrated
- Certifications: EN 50271, EN 61010-1, Low Voltage Directive 2014/35/EU, EMC Directive 2014/30/EU
Typical Applications
The Basic gas detection units are used for monitoring and warning of hazardous gas concentrations. They can be used for detecting commonly used refrigerants, particularly CO₂ in: supermarket refrigerated display cases, industrial ammonia-free cooling systems, cold storage facilities, transport refrigeration, and centralized building HVAC leak-detection networks.
Compatibility & Replacements
Compatible With
- Danfoss GDC Controller (148H6231)
- Danfoss GDC Controller Solution with Enclosure (148H6221)
- Danfoss GDC Controller Expansion Module (148H6222)
- Danfoss Warning Module / Wire-Break Monitor (148H6223)
- Modbus RS485 fieldbus networks
- Central Building Management Systems (BMS) with RS485 serial input
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The 148H6072 is designed as a single CO₂ infrared sensor unit and should be ordered as part of a complete Danfoss GDC detection system.
Works With
- Danfoss Service Tool (148H6224)
- Danfoss PC Tool (148H6235)
- Danfoss Calibration Adapter (148H6232)
- Modbus RTU protocol (standard implementation on GDC controllers)
- Industrial Modbus RTU devices and BMS integrations
