氟利昂R134A Detection
Formula CH₂FCF₃（1,1,1,2-四氟乙烷 / HFC-134a） · CAS 811-97-2 · 卤代烃制冷剂 / 强温室气体（GWP=1430）
Hazards & Toxic Symptoms
R134a (HFC-134a, 1,1,1,2-tetrafluoroethane) is a colorless gas with a slightly sweet odor. It is the most commonly used hydrofluorocarbon (HFC) refrigerant, with an ASHRAE safety rating of A1 (low toxicity, non-flammable). The main risks include: ① asphyxiation due to oxygen displacement caused by leakage in enclosed spaces (such as cold storage rooms, computer rooms, and auto repair shops) (1L of liquid gas ≈ 400L of gas upon vaporization); ② exposure to open flames or high-temperature metals (>250°C) leading to the decomposition and release of highly toxic substances such as HF and COF₂; ③ frostbite caused by contact with liquid R134a; ④ being a potent greenhouse gas (GWP=1430), it has been gradually restricted under the EU F-Gas Regulation. Commonly used monitoring methods include infrared (NDIR) and semiconductor halogen sensors.
Occupational Exposure Limits (GBZ 2.1-2019)
| PC-TWA (Time-Weighted Average) | 4170 mg/m³（AIHA WEEL 1000 ppm） |
|---|---|
| IDLH (Immediately Dangerous to Life or Health) | 50000 ppm |
⚠️ Actual alarm thresholds depend on on-site risk assessment. ⚙️ Use the GB Alarm Calculator →
Typical Application Scenarios
- Automotive air conditioning refrigerant (mainstream application)
- Household/commercial refrigerators and freezers
- Central air conditioning / chiller unit
- Aerosol propellant, medical inhalation carrier
- Cold storage / Precision air conditioning for data centers
Detection Principle / Recommended Sensors
Infrared (NDIR, most recommended) / Semiconductor halogen / Heated diode
Common Range：0-1000 ppm
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