硫化氢 Detection
Formula H₂S · CAS 7783-06-4 · 剧毒 / 易燃 / 神经毒性
Hazards & Toxic Symptoms
Hydrogen sulfide is a colorless, rotten egg-smelling, highly toxic gas (high concentrations can cause olfactory paralysis and thus be undetectable). It inhibits cytochrome oxidase, leading to tissue hypoxia. Loss of smell occurs at 100 ppm, and death can occur within minutes at 500 ppm. It is heavier than air and tends to accumulate in low-lying areas.
Occupational Exposure Limits (GBZ 2.1-2019)
| PC-TWA (Time-Weighted Average) | 10 mg/m³ |
|---|---|
| PC-STEL (Short-Term Exposure) | — |
| IDLH (Immediately Dangerous to Life or Health) | 100 ppm |
| LEL (Lower Explosive Limit) | 4.3% |
| UEL (Upper Explosive Limit) | 46% |
⚠️ Actual alarm thresholds depend on on-site risk assessment. ⚙️ Use the GB Alarm Calculator →
Typical Application Scenarios
- Municipal sewage/biogas digester
- Oil and gas (sulfur-bearing gas field)
- Paper making/tanning
- Coal mining / Operations in confined spaces
- Chemical industry
Detection Principle / Recommended Sensors
Electrochemical (most common) / Ultraviolet fluorescence (CEMS)
Common Range：0-100 ppm
📦 YOURUIAN Recommended Products
Matching product categories: 硫化氢 detector 硫化氢 analyzer