Refrigerant R448a, R32 R125 Fixed Gas Detector Monitor - IECEx ATEX Hazardous Area Zone 1,2
Refrigerant R448a, R32 R125 Fixed Gas Detector Monitor - IECEx ATEX Hazardous Area Zone 1,2
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The R125 & R32 Refrigerant Gas Online Detector is an explosion-proof, Ex-rated gas detector. Built to perform reliably in harsh industrial environments, it withstands moisture, dust, dirt, corrosion, and vibration.
Certified to IECEx and ATEX standards, the detector offers equipment protection levels of Intrinsic Safety "ia" and Flameproof "db", ensuring safe operation in hazardous areas commonly found in refrigeration plants, HVAC systems, chemical facilities, cold storage etc.
Utilising a pluggable, fixed-type sensor, it allows for simple maintenance post-installation and delivers continuous real-time monitoring of flammable and toxic gases—specifically R125 and R32 refrigerants. Standard outputs include 4-20mA, RS485, 1 relay output (expandable to 2), voltage (1~5V), and HART communication. Optional wireless transmission options include LORA and 4G.
The unit features a robust die-cast aluminium housing with an option for Stainless Steel 316, designed for maximum durability in Ex-rated zones. A magnetic wand interface enables safe menu navigation without opening the enclosure—ideal for hazardous areas.
R125 and R32 are flammable refrigerants, and early detection is crucial for leak prevention, fire safety, and compliance. This detector ensures proactive safety management by continuously monitoring air quality for any trace of these refrigerant gases.
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Technical Datasheet
Shipping
We aim to process and get your delivery with you as quick as possible -
Shipping rates and delivery times are calculated at checkout.
Guarantee
We aim to provide you with the best quality products, if for an unfortunate product defect we have a 14 day money back return guarantee.
Warranty
• 1 year warranty from the date of purchase.
• Invoice or shipment bill is required to claim the warranty.
• The warranty policy only requires manufacturer to repair the defective product or send substitute for replacement.
• Installation labour, electricity cost and other related cost will not be covered by the manufacturer warranty policy.
• Warranty doesn't cover the defect caused by inappropriate use, especially if directions of the instructions for use are not observed, normal abrasion as well as failures which affect the value or use of the product insignificantly.
Please see our returns policy for more information.
Calibration
To ensure you keep up to date with your metrology requirements, by adding the traceable standards calibration test report certificate.
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Hazardous Area Certified
Certification
- IECEx CQM 23.0027X
Equipment Protection Level
IECEx
- Ex db IIC T6 Gb
- Ex db ia IIC T6 Gb (without LEL sensor)
- Ex da db ia IIC T6 Gb (with separaed certified LEL sensor)
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FEATURES
Modular gas chamber for maintenance simply and conveniently
- Plug and play air chamber module replacement.
- Two-key magnetic bar design, no need to open the cover, to achieve on-site maintenance and operation of the detector in any explosion-proof area.
- 24h continuously monitoring, data will real-time display.
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FEATURES
- Standard 4-20mA current signal, RS485 digital signal, 1 set of relay signal output
- Optional 2 groups of relay signals, voltage 1 ~ 5V, standard Hart
- Optional LORA, 4G and other wireless transmission.
- Can be installed with computer software, to transmit the data to computer, workers can remote monitor the data
- Die-cast aluminium case, IP66/67 protection degree, water-proof, dust-proof, explosion-proof.
Introduction to the SG100 Ex Diffusion Explosion Proof Gas Detector
Applications
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Commercial Refrigeration Plants
Cold rooms, walk-in freezers, and display cases.
Detect leaks from evaporators, compressors, or valves containing R448A (a popular low-GWP replacement for R404A).
Compliance with EN 378, AS/NZS 5149 and F-Gas regulations. -
Mechanical Equipment Rooms / Chiller Rooms
Monitors ambient air around compressors, heat exchangers, or piping.
R32 and R125 are flammable (A2L), so early leak detection is critical to avoid accumulation and ignition risks. -
Industrial HVAC Systems
Found in large commercial buildings, factories, hospitals, and airports using R32 split systems or R125-based blends.
Detectors often integrated with ventilation systems to trigger extraction or shutdown.
⚠️ Why Detection is Important
R32 and R125 are A2L classified – mildly flammable.
R448A is a blend (R32, R125, R134a, R1234yf, R1234ze) – has global warming potential but lower than R404A.
Leaks can lead to:
- Asphyxiation in confined areas
- Fire or explosion hazards (R32/R125)
- Environmental impact and legal non-compliance
- Damage to refrigeration equipment and product loss
Add Calibration Service
Ensure to keep up to date with your metrology requirements, by adding the calibration test report certificate.
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Pre & Post After Sales Support
After Sales Support
We offer after sales support on all our products including
- Installation
- Configuration
- Maintenance
- Repair
- Calibration
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Calibration & Repair
Calibration ServicesOur accredited laboratory is tailored to conduct traceable standard calibrations and repairs on all our equipment.
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- AS/NZS 5149 Series – Refrigerating Systems and Heat Pumps – Safety and Environmental Requirements
AS/NZS 5149.1–4 outlines design, construction, installation, and operation.
Mandatory gas detection is required in machinery rooms or enclosed areas where refrigerant leaks may occur.
Requires: - Detectors calibrated to alarm at 25% of the Lower Flammability Limit (LFL) for A2L gases like R32 and R125.
- Alarms, ventilation activation, and system shutdowns when thresholds are exceeded.
🔹 AS/NZS 60079.10.1:2022 – Explosive Atmospheres – Classification of Hazardous Areas
Relevant where R32 or R125 leaks could create hazardous gas zones. - Requires area classification, zoning (Zone 1 or 2), and use of certified IECEx/ATEX gas detectors in those zones.
- Hazardous area documentation and zoning drawings are legally enforceable for compliance.
Our Core Values
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UNPARALLELED SUCCESS
We embrace every challenge as a team with our expertise, and have a proven track record of success when we collaborate.
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WORK SMARTER NOT HARDER
In order to do great work, we need knowledgeable, well-trained individuals, combined with automation. We are dedicated to not only providing our team with top-notch training, but also world-class equipment to ensure we’re stay at the cutting edge of the industry.
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TAKE PRIDE
Since the beginning, we have always believed in the quality and longevity of the products we sell and service we provide, and are proud to offer our expertise to all industries.
