二氧化硫 Detection
Formula SO₂ · CAS 7446-09-5 · 强刺激性 / 大气污染物
Hazards & Toxic Symptoms
Sulfur dioxide is a colorless irritating gas that reacts with water to form sulfurous acid. It strongly irritates the upper respiratory tract and ocular mucosa, and at high concentrations, it can cause laryngospasm and pulmonary edema. It is a major precursor of acid rain.
Occupational Exposure Limits (GBZ 2.1-2019)
| PC-TWA (Time-Weighted Average) | 5 mg/m³ |
|---|---|
| PC-STEL (Short-Term Exposure) | 10 mg/m³ |
| IDLH (Immediately Dangerous to Life or Health) | 100 ppm |
⚠️ Actual alarm thresholds depend on on-site risk assessment. ⚙️ Use the GB Alarm Calculator →
Typical Application Scenarios
- Desulfurization tower in coal-fired power plant
- Sulfuric acid production
- Paper/Pulp Bleaching
- Wine/Food Preservation
- Metallurgy (roasting/sintering)
Detection Principle / Recommended Sensors
Electrochemical sensor / UV fluorescence (CEMS)
Common Range：0-100 ppm
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Matching product categories: 二氧化硫 detector 二氧化硫 analyzer