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Hydrogen sulfide (H?S) has a unique "rotten egg smell," yet it is also a highly toxic neurotoxin. It can be detected by the sense of smell at low concentrations (0.13ppm), but high concentrations (above 1000ppm) quickly paralyze the olfactory nerves, causing poisoning without awareness. Its explosive range is 4.3%-46%, commonly found in the following scenarios:
High-Risk Industry List:
|
Industry Type |
Typical Scenarios |
Risk Level |
|
Petrochemical |
Crude oil extraction, sulfide reactors |
★★★★★ |
|
Wastewater Treatment |
Sewer dredging, anaerobic sludge tanks |
★★★★☆ |
|
Food Processing |
Curing workshops, biogas pond maintenance |
★★★☆☆ |
|
Concentration in Air (ppm) |
Immediate Reaction |
|
10 |
Safe threshold for 8-hour exposure |
|
200 |
Immediate eye and nose irritation, difficulty breathing |
|
500 |
Possible pulmonary edema and coma within 30 minutes |
|
>1000 |
Instant respiratory arrest, "electrocution-style" death |
Adhere to the principle of "ventilate first, detect next, operate last" before entering confined spaces.
Equip with positive-pressure air respirators; single-person entry into high-risk areas is strictly prohibited.
MST-4H2S-100 Hydrogen Sulfide Detection Gas Sensor
? Anti-cross-interference technology: Excludes interference from gases like CO, H?, NH?, CO?, and C?H?O.
? Miniaturized design: Dimensions of only 20mm×16.7mm, compatible with 4-series detectors.
? High sensitivity, high precision, linear output, anti-interference, and unique anti-leakage structure.
Risk Warning: The golden rescue time for hydrogen sulfide poisoning is only 4 minutes. It is recommended to equip emergency resuscitators in places prone to sulfide generation.
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