1245 Butler Rd • League City, TX 77573 • T: 409-927-2980 • F: 409-927-4180

What is a Hydrogen Sulfide (H2S) Gas Detector?

Posted by on Feb 14, 2020 in Gas Detectors, Hydrogen Sulfide | 0 comments

If you work with crude petroleum, natural gas, or bacterial decomposition, chances are you encounter hydrogen sulfide (H2S) on a regular basis. Hydrogen sulfide is a colorless, highly toxic gas that can cause a myriad of dangerous health symptoms. If proper detection systems aren’t in place, the safety of your workers and equipment could be at risk.

A hydrogen sulfide (H2S) gas detector is often part of a monitoring system designed to detect high levels of hydrogen sulfide in ambient air. Hydrogen sulfide detectors can also be used in sample draw monitors to remotely measure H2S gas in confined spaces, and with the proper equipment can be used to monitor the level of H2S in streams of natural gas. Overall, the hydrogen sulfide (H2S) gas monitor is an efficient way to monitor the gas concentrations in your vicinity.

How Does an H2S Detector Work?

Hydrogen sulfide gas detectors primarily use electrochemical sensors to detect and measure parts-per-billion (‘ppb’) and parts-per-million (“ppm”) levels of H2S gas. These sensors depend on a highly reliable electrochemical reaction that occurs when H2S gas combines with specific materials used in the sensor. This reaction creates a tiny electrical current that is amplified and measured by the electronics in the gas detector. These industrial quality H2S detectors can help make sure the  H2S concentration level stays below the limit required by The Occupational Safety and Health Administration (OSHA). 

What is a Hydrogen Sulfide (H2S) Gas Detector, GDS Corp, Houston, TX

Depending on the environment, the Permissible Exposure Limits (PEL) for H2S gas are:

  • General Industry Ceiling Limit: 20 ppm
  • General Industry Peak Limit: 50 ppm (up to 10 minutes if no other exposure during shift)
  • Construction 8-hour Limit: 10 ppm
  • Shipyard 8-hour limit: 10 ppm

Types of Hydrogen Sulfide Detectors

GDS Corp offers a number of gas detectors that can be programmed to monitor hydrogen sulfide exclusively, such as:


  • GASMAX CX Gas Monitor – Single or dual channel gas monitor certified for hazardous areas where gas readings need to be transmitted in real-time
  • GASMAX EC Gas Monitor – Loop-powered gas detector for all toxic gases; certified for Explosion Proof or Intrinsically Safe installations
  • GDS-58NXP – Single or dual channel sample draw gas monitor designed to measure gas samples pulled from remote locations up to 100 feet away
  • GDS-49 Gas Sensor  – Loop-powered stand-alone gas sensor transmitter with replaceable sensors for any toxic gas
  • GDS-68XP or GDS-68SXP Process Monitor – Process gas monitor used to measure hydrogen sulfide or mercaptans in low oxygen streams such as gas pipelines.

Pro Tip: In addition to your health, don’t neglect to protect your equipment from hydrogen sulfide’s flammable nature in very high concentrations. Install a flame detector to ward off any potential fires.

Reliable Gas Detection Systems

Does your waste facility or manufacturing process have a gas detection system installed? While hydrogen sulfide is typically characterized by its rotten egg smell, you can’t rely on your senses alone since high levels of H2S cannot be detected by smell. Don’t ignore the hazardous effects of H2S in your vicinity; install an H2S gas detector you and your team can rely on.

Not sure which gas detector to choose? Connect with our gas detection professionals to find the best solution for your facility.

Read More

Harmful Health Effects of Hydrogen Sulfide (H2S)

Posted by on Feb 7, 2020 in Hydrogen Sulfide | 0 comments

Hydrogen Sulfide is commonly found in crude petroleum and natural gas. It is produced by the bacterial decomposition of organic matter and can also be found in sewerage plants, livestock pens, bogs or swamps. In high concentrations, hydrogen sulfide gas can be extremely dangerous. If you’ve been exposed to a harmful level, the effects of hydrogen sulfide can range in severity from nausea to death.

Do you regularly work in processes that produce hydrogen sulfide gas? While the gas has been found in homes as a result of plumbing leaks, there is a greater chance for overexposure in workplaces and industrial settings. Depending on your industry, high levels of hydrogen sulfide could cause injury or death if not properly detected. Protect the health of your workers by understanding the dangers and signs of H2S poisoning and by installing gas detectors that can provide early warnings.

Dangerous Effects of Hydrogen Sulfide

Exposure to hydrogen sulfide usually occurs through inhalation, but occasionally can cause skin or eye irritation. Due to the invisible nature of gas, the spread of hydrogen sulfide has no bounds. While its foul-smell can warn of a hazardous leak, your sense of smell isn’t reliable. High concentrations of H2S in the air can actually corrupt your senses from working (olfactory desensitization), which could put your health at grave risk.

The dangerous nature of hydrogen sulfide is reflected in its ability to affect every organ in your body. According to the Agency for Toxic Substances & Disease Registry (ASTDR), prolonged exposure could cause eye irritation, fluid in the lungs, and eventual loss of consciousness. Your prognosis is usually determined by the amount of H2S that you were exposed to, especially if you’re wondering about your long term outcome.

Pro Tip:  We have a selection of gas detectors that can be set up as hydrogen sulfide monitors for your facility’s detection system.

Symptoms of Exposure

Depending on the length of time and amount of hydrogen sulfide exposure, your symptoms will range in severity. To enable detection systems to monitor levels of exposure, OSHA has set a permissible exposure limit for H2S gas of 10 ppm over an 8-hour period. Anything higher than that could cause extensive injuries or death.

Low Concentrations (10 ppm or less)

  • Burning eyes
  • Coughing
  • Shortness of breath
  • Headache
  • Nausea

Moderate Concentrations

  • Eye irritation
  • Fluid in lungs
  • Difficulty breathing
  • Insomnia

High Concentrations (100 ppm or greater)

  • Tremors
  • Convulsions
  • Rapid unconsciousness
  • Coma
  • Death

Hydrogen Sulfide Poisoning: What To Do

If you’ve been exposed to hydrogen sulfide, the most important thing to do is to not panic. While it is a very toxic gas, there might be time before you start experiencing symptoms. For eye or skin exposure, it’s important to wash immediately and remove all of your clothing. If you’ve inhaled hydrogen sulfide, try to get to fresh air and away from the contaminated area.

No matter the situation, it is crucial for you to get to a hospital immediately, even if you’re exposed to low concentrations. While headache or nausea might see like minimal concerns, those symptoms could be your first warning of a nervous system failure.

Protect Your Buildings from H2S Gas

In workplaces where hydrogen sulfide gas is produced, the effects of exposure can cause bodily harm as well as damage to your equipment. Due to the flammable nature of H2S, it’s critical for wastewater facilities and industrial manufacturers to have a reliable gas detector in place at all times.

Does your business have an H2S gas monitor? Connect with our team to choose the best detection system for your area.

Read More

How To Protect Yourself From Hydrogen Sulfide Gases

Posted by on Jul 1, 2019 in Hydrogen Sulfide | 0 comments

When protecting employees from dangerous gas leaks, the best way to do so is by installing a detection system that features many capabilities. This is particularly important when guarding against hydrogen sulfide, which can be one of the deadliest gases if leaks are not detected. If you are responsible for overseeing an offshore drilling platform, industrial plant, laboratory, or other work setting where this type of gas is used, here are some ways to protect yourself from a gas leak.

Read More

Risks And Hazards Of Hydrogen Sulfide

Posted by on Nov 1, 2018 in Hydrogen Sulfide | 0 comments

For workers who spend their days on offshore drilling platforms or in water treatment plants, manufacturing facilities, and research labs, hydrogen sulfide is a threat they must take very seriously. A colorless gas with a smell like rotten eggs, it can quickly spread over large areas, putting those nearby in great danger in a matter of minutes. When this occurs, the risk of a fire or explosion increases, often resulting in the evacuation of an area. Due to the serious situations that result from a hydrogen sulfide gas buildup, companies rely on hydrogen sulfide gas detectors to keep facilities and employees safe.

Read More

What Are the Key Features of Hydrogen Sulfide Sensor

Posted by on Jun 5, 2018 in Hydrogen Sulfide | 0 comments

Arguably the most toxic gas found in industrial environments, hydrogen sulfide can be deadly in only a matter of minutes. Due to the many dangers associated with this type of gas, companies in the oil and gas industry, as well as other manufacturing industries, have invested in hydrogen sulfide gas detectors in an effort to improve workplace safety and protect employees. But to make sure your company chooses the best hydrogen sulfide sensors, it’s important to have an understanding of the key features these sensors possess.

Read More

Sign up to get our new content first!