氮氧化物 Detection
Formula NOx (NO+NO₂) · CAS 10102-44-0 (NO₂) · 强刺激性 / 大气污染物
Hazards & Toxic Symptoms
Nitrogen oxides (NOx) consist of nitric oxide (NO) and nitrogen dioxide (NO₂). NO₂ is a reddish-brown gas with a pungent odor. It can penetrate deep into the pulmonary alveoli, causing pulmonary edema, and long-term low-dose exposure can lead to chronic bronchitis. It is a major precursor to acid rain and photochemical smog.
Occupational Exposure Limits (GBZ 2.1-2019)
| PC-TWA (Time-Weighted Average) | 5 mg/m³ (NO₂) |
|---|---|
| PC-STEL (Short-Term Exposure) | 10 mg/m³ (NO₂) |
| IDLH (Immediately Dangerous to Life or Health) | 20 ppm (NO₂) |
⚠️ Actual alarm thresholds depend on on-site risk assessment. ⚙️ Use the GB Alarm Calculator →
Typical Application Scenarios
- Flue gas from coal-fired boilers
- Vehicle exhaust detection
- Production of nitric acid/nitro compounds
- Metallurgical/Electroplating Workshop
- Welding operation
Detection Principle / Recommended Sensors
Electrochemical (NO/NO₂ discrete) / Chemiluminescence (environmental monitoring)
Common Range：0-50 ppm
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Matching product categories: 氮氧化物 detector 氮氧化物 analyzer