• By Chris Dodds : estimated reading time 3 minutes

Hydrogen Sulphide Gas Detection

Hydrogen Sulphide (H₂S) is a potentially lethal gas when exposure occurs, even at low levels. At dilution levels as low as 2-5 PPM, workers can experience nausea and headaches. At 20 PPM people can experience fatigues, dizziness and loss of memory. If the amount of gas reaches 1000 – 20,000 PPM this can be fatal and cause instant death.

Managing H₂S gas in the workplace is key and to prevent workers coming into contact with harmful gases and preventing plant downtime.

These factors alone warrant the installation of effective gas detection and monitoring.

Gas safety is classified into three tiers:

Category 0 – Areas where gas will be present during normal working operations such as confined spaced or vessels

Category 1 – Areas in which gas may be encountered during normal working conditions. Entry is only allowed with a portable gas detector and fixed detection

Category 2 – Areas which are free from gas during normal working conditions but could be contaminated by a gas leak

Key points to remember For H₂S Gas Detection:

• Hydrogen Sulphide naturally occurs in crude petroleum and natural gas reservoirs
• H2S is toxic at less than 20 parts per million
• It becomes flammable at 4.3% of air by volume
• H2S is 1.2 times heavier than air so stays low in windless conditions
• Hydrogen Sulphide has a highly corrosive nature which increases the chance of a gas leak
• H2S inhibits pellistors so infrared sensors may well provide a better detection option
• Personal and fixed gas monitors are needed to ensure worker safety

Solutions To Monitor Hydrogen Sulphide (H₂S) Levels

T&D are international distributors for a range of portable and fixed gas detectors. Gas detectors suitable for the fixed point and portable monitoring of H₂S gas include;

• Crowcon Gasman
• Crowcon Gas-Pro
• Crowcon Tetra
• Crowcon Triple plus
• Crowcon Xgard

Video: Crowcon Clip and Clip+; Maintenance Free Single Gas Monitors

Crowcon – Portable And Fixed Gas Detection Solutions

Crowcon – H2S Gas Detection

Crowcon gas detectors provide a fixed and portable solution to gas detection problems in many industries, detecting single and multiple gases dependent upon individual requirements.

More Reading

• Methane CH4 Gas Detection – See How Crowcon Detects CH4 Gas Levels
• Gas Detection In The Food Processing Industry Using Portable Gas Detectors

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