Refrigerant detection sensor 'SGD43S-M3-Sx'
Compliant with UL standards for refrigeration and freezing equipment, as well as air conditioning units. Supports IP54, suitable for harsh conditions and outdoor applications.
The "SGD43S-M3-Sx" is a refrigerant detection sensor that has obtained UL certification as an RDS (Refrigerant Detection System) and is compatible with applications using A2L refrigerants. With an IP54 rating for dust and water resistance, it demonstrates stable performance even in outdoor or harsh environments. Based on a detection method utilizing thermal conductivity principles, it achieves fast response and long-term stability, while also offering maintenance-free operation with a lifespan of over 15 years, contributing to both safety and cost-effectiveness. 【Product Lineup】 ◎ For HVAC applications: "SGD43S-M3-S5" Supports monitoring of R-454B and R-32 through dual calibration, compliant with UL60355-2-40. ◎ For refrigeration and freezing applications: "SGD43S-M3-S7" Supports monitoring of R-454A, R-454C, and R-455A through triple calibration, compliant with UL60335-2-89. *For more details, please refer to the materials available for download in the catalog. Feel free to contact us with any inquiries.
basic information
【Other Features】 - When a leak is detected, the status is visually displayed with two colored lights. - The "SGD4x" series products have a track record of orders from major U.S. HVAC OEMs and have begun transactions with two major domestic OEMs. - Based on over 20 years of development experience, A2L solutions are provided.
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For more details, please refer to the materials by downloading the catalog. Feel free to contact us as well.
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Exhibited at Smart Sensing 2026.
Sensirion exhibited at the "Automotive Technology Exhibition 2026," held at Tokyo Big Sight from June 10 (Wednesday) to June 12 (Friday), 2026. At this exhibition, we showcased sensor solutions for automotive applications, in addition to environmental sensing and flow sensing. We also presented various measurement demonstrations and new products for the first time at the exhibition, allowing many visitors to see the performance and technological capabilities of our products. We would like to express our heartfelt gratitude to all the attendees. 【Main Demonstration Exhibits】 SCD5x New CO2 Sensor SGD4x Refrigerant Detection Sensor SEN6x Indoor Air Quality Combo Sensor Module SLF3x Liquid Flow Sensor Integrated Combo Module for HVAC (SAEN6) Refrigerant (Propane) Leak Detection Sensor Module (SACD4) Window Fog Detection Sensor Module (SAAF4)
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We will be exhibiting at Smart Sensing 2026 from June 10 to 12.
Sensirion AG will be exhibiting at the exhibition "Smart Sensing 2026" held at Tokyo Big Sight from June 10 (Wednesday) to June 12 (Friday). At this exhibition, in addition to environmental and flow sensing, we will also introduce refrigerant detection solutions and sensor solutions for automotive applications. We will showcase measurement demonstrations and new products that will be unveiled for the first time at the exhibition, providing an opportunity for you to directly confirm the performance and technological excellence of our products. We hope you will stop by. ■ Venue: Tokyo Big Sight ■ Booth No.: F - 07 (West Hall 3) ■ Exhibits: Refrigerant detection sensor measurement demo CO2 sensors (NDIR, photoacoustic, thermal conductivity) measurement demo Indoor air quality combo sensor module (temperature and humidity, PM, VOC, NOx, CO2, HCHO) measurement demo Liquid flow sensor measurement demo Anti-fog detection/automatic defrost sensor (SAAF series) measurement demo Various physical samples All of our staff are looking forward to welcoming you.
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Optimal HVAC solution for A2L refrigerant leak detection: "SGD43S-M3-S5"
Sensirion's "SGD43S-M3-S5" is a robust refrigerant leak detection system designed for HVACR (heating, ventilation, air conditioning, and refrigeration) applications. It utilizes Sensirion's proprietary thermal conductivity technology to achieve high-precision detection for A2L refrigerants (R-32, R-454B). ■ Features - Over 15 years of design life: Maintenance-free with long-term stable operation - Harsh environment compatibility: Operates in -40°C to 85°C, 0 to 100% RH, and 80 to 110 kPa - Easy integration: Dual relay output, RS-485 interface, and mounting bracket included - Self-diagnostic function: Detects faults and lifespan, notifying via relay and LED - Multi-refrigerant compatibility: Detects R-32 and R-454B with a single calibration - Compliance with safety standards: UL 60335-2-40, UL 60335-2-89, RoHS compliant ■ Target Users HVAC design engineers considering the transition to A2L refrigerants For product specifications and case studies, please contact us or use the document download option.
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Exhibited at Smart Sensing 2025.
We exhibited at the exhibition "Smart Sensing 2025," held at Tokyo Big Sight from June 18 to 20, 2025. A diverse range of technologies and products that expand future possibilities, from sensor technology to AI and data utilization services, were showcased, and many visitors came to our booth. This time, along with our environmental sensors, flow sensors, and automotive modules, we also displayed six types of demonstrations. SEN66: Indoor Air Quality Combo Sensor Module SGD43S: Refrigerant Detection Sensor SCD43 / STCC4: CO₂ Sensor SLF3S: Liquid Flow Sensor SAAF: Fogging Detection and Automatic Defrost Sensor Visitors had the valuable opportunity to see products that cater to a wide range of applications, including air quality measurement, gas leak detection, visualization of factory safety management, and flow measurement and control in the semiconductor, medical, and research fields, while experiencing the sensors' fast response and high precision. Thank you very much to everyone who visited our booth. We sincerely appreciate the many attendees who contributed to the lively atmosphere of the exhibition each day.
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We will be exhibiting at Smart Sensing 2025 from June 18 to 20.
Sensirion AG will be exhibiting at the "Smart Sensing 2025" exhibition held at Tokyo Big Sight from June 18 to 20. At this exhibition, in addition to environmental sensing and flow sensing, we will also introduce sensor solutions for automotive applications. We will showcase measurement demos and new products that will be publicly unveiled for the first time, providing an opportunity for you to directly confirm the performance and high level of our technology. We look forward to your visit. ■ Venue: Tokyo Big Sight ■ Booth No.: E - 8 (East Hall 8) ■ Exhibits: SEN6x Indoor Air Quality Combo Sensor Module Measurement Demo SGD4x Refrigerant Detection Sensor Measurement Demo SCD4x/STCC4 CO2 Sensor Measurement Demo SLF3x Liquid Flow Sensor Measurement Demo Fog Detection/Automatic Defrost Sensor Measurement Demo Various Physical Samples All of our staff are sincerely looking forward to your visit.
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Sensirion's mission is to provide sensors and sensor solutions with excellent design and reliability, becoming the number one partner for our customers. We aim to elevate the standards of sensor technology by leveraging technology intelligence. In doing so, we contribute to improving the sustainability, efficiency, health, safety, and quality of life for people and businesses. We pursue a common goal of shaping the future of the automotive industry, industrial sectors, building and HVAC technology, medical technology, and consumer electronics through innovation in collaboration with our partner companies and customers. Sensirion was founded in 1998 and currently has about 1,000 employees at its headquarters in Stäfa, Switzerland, and numerous subsidiaries around the world.





