CAREL GLD Mini Meter – Reliable Gas Leak Detection

As refrigeration and HVAC technologies continue to evolve towards environmentally friendly refrigerants, ensuring system safety has become a top priority. The growing use of low Global Warming Potential (GWP) refrigerants such as R290 and A2L refrigerants (R32, R454A, R454B and R454C) requires highly reliable gas leak detection solutions capable of continuous monitoring and rapid response.

The CAREL GLD Mini Meter has been developed to meet these new market demands. Combining advanced NDIR sensing technology, industrial-grade reliability and digital communication capabilities, it provides an efficient solution for commercial refrigeration, industrial cooling and HVAC applications.

Accurate Detection with NDIR Technology

The GLD Mini Meter utilizes Non-Dispersive Infrared (NDIR) sensing technology, widely recognized as one of the most reliable methods for refrigerant gas detection.

Unlike conventional semiconductor sensors, NDIR technology selectively measures the target refrigerant by analyzing infrared light absorption. This minimizes false readings caused by humidity, dust, contaminants or cross-sensitivity to other gases.

Key advantages include:

• High measurement accuracy
• Continuous real-time monitoring
• Long sensor lifetime exceeding 15 years
• Automatic self-calibration
• Minimal maintenance requirements
• Excellent resistance to contamination and harsh environmental conditions

These characteristics significantly reduce operating costs while ensuring dependable long-term performance.

Built for Harsh Operating Conditions

The GLD Mini Meter has been designed specifically for demanding refrigeration environments.

Its compact housing offers IP67 protection, ensuring resistance against dust and water ingress. The detector has also been tested under critical icing and de-icing conditions, providing stable operation even in challenging industrial installations.

The integrated USCAR connector enables quick plug-and-play installation while providing secure electrical connections resistant to vibration and temperature fluctuations.

Intelligent Monitoring and System Integration

Unlike conventional standalone detectors, the Meter version supports advanced monitoring applications.

Through its optically isolated RS485 interface with Modbus® protocol, the detector continuously communicates refrigerant concentration data to building management systems, refrigeration controllers and industrial automation platforms.

In addition, redundant alarm relays provide enhanced operational safety by maintaining reliable alarm functionality even in the event of component failure.

Optimized for Modern Refrigerants

The GLD Mini Meter is available in dedicated versions for:

• R290
• R32
• R454A
• R454B
• R454C

Each detector is individually calibrated for its target refrigerant, ensuring maximum measurement accuracy throughout its operating range.

Compliance with International Standards

The GLD Mini Meter has been developed in accordance with current European directives and internationally recognized standards, providing confidence for OEMs, system integrators and installers.

The product complies with:

European Directives

• RoHS Directive 2011/65/EU
• EMC Directive 2014/30/EU

Electromagnetic Compatibility

• EN 50270
• EN 61000-6-2
• EN 55014-1

Safety Standards

• EN 60335-2-40
• EN IEC 60335-2-89
• IEC 60730-1

The product has also been designed according to the latest requirements of EN 60335-2-40:2024 (Annex LL), ensuring compliance with current safety requirements for refrigeration equipment using flammable refrigerants.

Designed for Long-Term Reliability

With an operating temperature range from -40°C to +70°C, humidity resistance up to 100% RH (condensing) and a service life exceeding fifteen years, the GLD Mini Meter offers an ideal solution for demanding refrigeration applications.

Its maintenance-free operation, compact dimensions and digital connectivity make it suitable for OEM manufacturers, refrigeration contractors and facility operators seeking a future-proof gas detection solution.

As refrigeration technology moves towards safer and more sustainable refrigerants, the CAREL GLD Mini Meter provides the precision, reliability and regulatory compliance required to protect both people and equipment.

Read more: CAREL

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