R-1234yf
C₃H₂F₄R-1234yf (2,3,3,3-tetrafluoropropene, HFO-1234yf) is a hydrofluoroolefin refrigerant that has become the global standard for automotive air conditioning, replacing R-134a. With an ultra-low GWP of less than 1 and atmospheric lifetime of only 11 days, R-1234yf represents a breakthrough in refrigerant environmental performance. The refrigerant is classified as A2L (mildly flammable), requiring appropriate safety measures in vehicle design and service procedures. R-1234yf is also used as a component in many next-generation stationary refrigerant blends including R-448A, R-449A, R-452A, and R-454B. Global automotive manufacturers adopted R-1234yf to comply with European MAC Directive requirements beginning in 2017.
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Key Information
Essential safety and exposure information for R-1234yf
Health Effects
Low toxicity but mildly flammable. Can decompose to toxic hydrogen fluoride when exposed to flame.
Common Sources
Automotive air conditioning systems and some commercial refrigeration applications.
Exposure Limits
- WEEL
- 500 ppm (8-hr TWA)
- A2L flammable
- A2L flammable
- HFO refrigerant
- HFO refrigerant
Regulatory Status
- EPA Classification
- HFO (non-ODS)
- ASHRAE Safety Group
- A2L (low toxicity, mildly flammable)
- GWP (AR5)
- <1
- ODP
- 0
- LFL
- 6.2% by volume
- EU MAC Directive
- Required for new vehicles since 2017
Detection Requirements
- Sensor Technology
- Infrared (NDIR) or Semiconductor
- Detection Range
- 0-2,000 ppm (leak detection) or 0-50,000 ppm (LFL monitoring)
- Response Time
- <30 seconds (T90)
- Calibration Frequency
- Semi-annual to annual
- A2L Safety
- Service bay ventilation requirements apply
Related Applications
Industries and environments where R-1234yf detection is critical
Hotels
Continuous monitoring of refrigerant gases in hotel rooms are used to keep the indoor environment comfortable.
Data Centers
Refrigerant leaks from cooling infrastructure can create asphyxiation risks, while hydrogen off‑gassing from battery systems can form an explosive hazard.
Detection Solutions
Sensors and detectors for R-1234yf monitoring
cGas Detector VRF IR Refrigerant Transmitter
An aesthetic, non-dispersive infrared refrigerant gas detector for acute leak detection in modern energy-efficient buildings utilizing Variable Refrigerant Flow (VRF) HVAC systems.
cGas-SC Self-Contained Controller
A self contained controller with up to 3 gas channels, Plug & Play Smart Sensor Technology and configurable logic control and priority settings. Offers superior user customization and reliable gas detection performance for monitoring many gases.
cGas Detector IR Refrigerant Transmitter
Non-dispersive infrared refrigerant gas detector with accurate, low level leak detection, available with analog output or BACnet® or Modbus® output and Plug & Play Smart Sensor Technology.
FCS Multi Channel System Controllers
High performance controller with logic and priority settings for monitoring toxic, combustible and refrigerant gases with versatile control functionality. Available with Modbus® or BACnet® communication with BAS, supports 4-20 mA and Modbus® driven VFDs.
Related Gases
Other A2L Refrigerants we detect