Top 3 Gas Detectors for Tank Storage
Tanks containing crude oil, gasoline, diesel, or other petroleum products can emit hazardous gases such as hydrogen sulphide (H₂S), carbon monoxide (CO), volatile organic compounds (VOCs) including benzene, and other combustible vapours. These gases can accumulate in tank vapour spaces, creating toxic or flammable atmospheres that are often invisible and odourless. Continuous or pre-entry monitoring with gas detectors allows early detection of dangerous concentrations, enabling timely ventilation, evacuation, or mitigation measures, and ensuring compliance with safety regulations.
The Need For A Pumped Device
Tanks can contain hazardous gases such as hydrogen sulphide (H₂S), carbon monoxide (CO), volatile organic compounds (VOCs), and combustible hydrocarbons, which may accumulate in the vapour space. Since these gases can be toxic, flammable, or even explosive, it is dangerous to enter without knowing the conditions inside. A pumped gas detector allows you to sample the air remotely, drawing vapours from within the tank to the sensor without placing personnel at risk. This provides an accurate pre-entry reading of oxygen levels, toxic gases, and combustible vapours, helping to determine whether the atmosphere is safe for entry or if ventilation and mitigation measures are required.
Top 3 Gas Detectors for Tank Storage
BW Clip to detect H2S
Hydrogen sulphide (H₂S) is commonly found in various areas of tank storage facilities. Many crude oil tanks naturally contain H₂S, which can evolve into the vapour space during storage, creating a toxic atmosphere above the liquid. Produced water and slop oil tanks also pose a risk, as water separated from crude oil during production often contains dissolved H₂S. In refinery and petrochemical storage, tanks holding residual fuels, asphalt, sour condensates, or certain chemical intermediates can release H₂S vapours. Fixed roof tanks and their vents may allow vapours to accumulate inside or escape through pressure-vacuum valves. Additionally, pipeline and manifold areas can be sources of H₂S exposure when leaks occur or during venting operations, posing hazards to personnel and the surrounding environment.
The BW Clip Series is one of the most user-friendly, reliable, and cost-effective solutions for ensuring safety, compliance, and productivity. For H₂S, a two-year version is available, which can extend its operational life even further when used with a hibernation case for periods of inactivity of a week or more, effectively prolonging service life for up to a year.
For more information, click here: BW Clip 3 Year Single Gas Detector | Rockall Safety
BW Ultra for H2S, CO, LEL, O2 and VOCs
Storage tanks can contain a variety of hazardous gases that pose both health and safety risks. Hydrogen sulphide (H₂S), found in sour crude oils and some refined products, can accumulate in tank vapour spaces and is highly toxic and flammable, requiring careful detection. Carbon monoxide (CO), though less common, may form near burners, heaters, or hot surfaces due to incomplete combustion or reactions with flammable gases. Volatile organic compounds (VOCs), including benzene, toluene, xylene, and other hydrocarbons from crude oil, gasoline, and diesel, are highly flammable and a major concern for emissions and fire hazards. Combustible gases, measured via their Lower Explosive Limit (LEL), such as methane and other hydrocarbons, can cause fires or explosions if concentrations exceed safe levels. Oxygen (O₂), present from air ingress or tank operations, must be monitored closely because it supports combustion and can exacerbate fire risks.
The Honeywell BW™ Ultra is a five-gas detector engineered for safe sampling and monitoring of confined spaces, both before and during entry. It features advanced sensor technology, clear gas-readout visibility, enhanced comfort, and reliable connectivity, even in the harshest environments. The device simultaneously monitors the four gases typically required for confined-space safety, while a fifth customisable sensor allows you to track an additional gas of your choice, providing an extra layer of protection for every confined-space entry.
For more information, click here: BW Ultra 5 Multi-Gas Detector | Rockall Safety
UltraRAE 3000+ for VOCs & Benzene
Volatile organic compounds (VOCs), including benzene, are commonly present in tank storage containing crude oil, gasoline, diesel, and other petroleum products. These compounds readily evaporate from the liquid phase into the tank’s vapour space, creating flammable and potentially toxic atmospheres. Benzene, a specific VOC found in many hydrocarbons, is particularly hazardous due to its toxicity and carcinogenic properties.
The UltraRAE 3000 is a leading Compound-Specific Monitor, offering exceptional versatility and precision. Its Photoionisation Detector (PID) provides an extended detection range of 0.01 to 10,000 ppm in VOC mode and 10 ppb to 200 ppm in benzene-specific mode, making it ideal for a variety of applications from pre-entry screening during refinery and plant maintenance to hazardous material response, marine spill incidents, and downstream refinery monitoring.
For more information, click here: UltraRAE 3000 Rae Systems Benzene Detector
