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Hydrogen Sulphide (H2S)

Hydrogen Sulphide (H2S)

Hydrogen sulphide (H2S) is a colourless gas with a strong odour resembling rotten eggs. Due to its higher density than air, it can accumulate in low-lying areas under still conditions. People are commonly exposed to hydrogen sulphide through inhalation or contact with the skin and eyes. Fortunately, absorbed hydrogen sulphide does not accumulate in the body, as it is quickly metabolised in the liver and excreted through urine. In the atmosphere, it typically breaks down within three days and is dispersed by wind.

Reducing exposure to hydrogen sulphide (H2S) and managing emissions

To minimise exposure to hydrogen sulphide (H2S), precautions should be taken if its odour is strong or poses a risk to health and well-being. It is advisable to avoid areas where the gas is known to be present and to keep windows closed when the odour is noticeable outdoors. Ventilation should only be restored once the smell has dissipated. Additionally, outdoor physical activity should be limited during periods of high hydrogen sulphide concentration, particularly when exertion increases the breathing rate. If human activities, such as industrial processes, are the source of the gas, appropriate measures like containment and filtration systems can help manage emissions effectively.

Water contamination and treatment solutions

When bore water is contaminated with hydrogen sulphide (H2S), treatment options may be available to mitigate its effects. One common method involves using a chemical agent that removes iron from the water, thereby disrupting bacterial activity responsible for producing the gas. Water treatment companies can provide guidance on suitable treatments. If hydrogen sulphide-contaminated water is used for irrigation, it may release significant amounts of gas into the air. To reduce odour emissions, strategies such as using less water, employing low-to-the-ground delivery methods with larger droplets, and irrigating when there is enough wind to disperse the smell can be implemented. Additionally, watering at night, when fewer people are around, may help minimise the impact.

CAS-Number: 7783-06-4.

Monitoring hydrogen sulphide (H2S) with our equipment

To ensure safety in environments where hydrogen sulphide (H2S) is present, the use of reliable gas detection equipment is essential. WatchGas offers a range of H2S gas detectors designed to provide early warnings of hazardous concentrations. These detectors are widely used in industries such as oil and gas, wastewater treatment and mining, where exposure to hydrogen sulphide (H2S) is a significant risk. With advanced sensor technology, our products provide accurate real-time readings and can be configured with alarms to alert workers when gas levels exceed safe limits.

Reach out to us for advice

Hydrogen sulphide (H2S) is a potentially harmful gas that requires careful management to reduce exposure and prevent health hazards. Whether through avoiding contaminated areas, implementing emission controls or using our gas detectors, various measures can help mitigate its risks. Contact our team today for expert advice on hydrogen sulphide (H2S) detection and safety solutions.


Compatible products

  • Single gas

  • Cost effective

SST1 2&3 year model icon arrow

The SST1 single gas detector provides up to three years of maintenance-free operation and is available in H2S, SO2, CO or O2 (2-year only) models.

  • Single Gas

  • Serviceable

SST1 Serviceable icon arrow

The SST1 Serviceable offers one of the most cost-effective solutions on the market. With its 3-year replaceable battery and solid polymer sensor technology the SST1 offers a compact and modular design, while not compromising on its ruggedness.

  • Wireless charging

  • NFC

SST4 Micro&Mini icon arrow

The SST4 range is a four-gas device, designed with simplicity, size and with the user in mind. With its compact yet rugged design the SST4 is always there when you need it.

  • Low costs of ownership

  • Single gas

PDM icon arrow

The disposable PDM is a full-featured single gas detector that offers you unequalled value. The PDM single gas detector is your daily monitor for hazardous environments, because of its high reliability and user-friendliness.

  • Sustainable

  • Single gas

PDM+ icon arrow

The PDM+ is a personal sustainable single gas detector designed to detect Oxygen deficiency and the presence of toxic gas in the ambient environment.

UNI DISPOSABLE Low Total Costs Of Ownership Single Gas Detector
  • Low costs of Ownership

  • Single gas

UNI Disposable icon arrow

The UNI Disposable is a disposable and low cost of ownership, version of UNI Sustainable single gas detector. It detects H2S (Hydrogen Sulphide), CO (Carbon Monoxide), and O2 (Oxygen) in your selection of models for operation life of 12-months and 36-months.

  • Sustainable

  • Single gas

UNI Sustainable icon arrow

The UNI Sustainable is a sustainable single gas detector that offers a simple portable solution for a wide array of toxic gases and O2 (oxygen) applications.

  • Versatile

  • Multi gas

QGM icon arrow

The WatchGas QGM is a versatile multi-gas monitor engineered to keep you and your staff safe while working in hazardous environments.

  • Many sensor options

  • Multi gas

POLI icon arrow

The WatchGas POLI in pumped version is an advanced instrument with an integrated pump that enables a full range of sensors for a variety of applications, including confined space entry.

NEO High-End Photo Ionization Detector
  • VOC

  • PPB detection

NEO icon arrow

The NEO is one of the most advanced handheld VOC (Volatile Organic Compound) monitors available for ppb (parts per billion) detection.

safe area monitor
  • Safe area solution

  • Transportable

AirWatch Mk1.2 icon arrow

The AirWatch is your safe area solution for the monitoring of various gases. Based on the measurement values and alarms, equipment is switched on or off, data is logged and optionally employees are remotely informed of the gas concentrations present.

gas sensor
  • Wide range of sensors

  • Versatile

XDI icon arrow

The XDI-F1 Gas Sensor is capable of utilizing a wide range of sensor cell types offering an unmatched number of gases that may be monitored. Standard 4~20mA signaling with CANbus address enables the sensors to be networked via the WatchGas Combi control system or customer preferred monitoring systems.

Explosion proof gas detector
  • Wide range of sensors

  • Versatile

XDIwin icon arrow

The XDI gas sensor is capable of utilizing a wide range of sensor cell types offering an unmatched number of configurations allowing for a simple stand-alone 4~20mA transmitter

  • Control Unit

  • SAFE AREA MONITOR

WatchGas 102 icon arrow

A fixed dual sensor gas alarm unit that meets the requirements for economic and reliable monitoring of gas levels in a wide range of environments, from commercial premises through to heavy industrial applications that may require hazardous area sensing.

15J(win) / 30J(win) gas transmitter
  • Gas sensor

  • Gas transmitter

15J(win) / 30J(win) icon arrow

The 30J enclosure has been designed to allow quick and easy access to its interior by adjustment of two allen screws, this factor is a major consideration when large system service and calibrations are being carried out.