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

What is an LEL Gas Monitor and How Does It Work?

Posted by on Jan 24, 2020 in LEL Detector | 0 comments

If you work around sources of gas that are flammable, you may have noticed the term LEL, a term that is short for Lower Explosive Limit. Monitoring for hazardous levels of LEL is important if you want to maximize safety and minimize the risk of fire or explosions in your facility. The terms “gas monitor” and “gas detector” are sometimes used interchangeably when monitoring for explosive gases. 

If there is a risk that hazardous levels of combustible gas may be present, safety and insurance conditions may require a fixed combustible gas detection system and/or portable gas detectors. Both types of products will help you monitor the combustible gas concentration in your facility and will provide early warning in the unfortunate event a leak were to occur. 

Defining LEL (Lower Explosive Limit)

What is LEL? LEL stands for “Lower Explosive Limit” and is the lowest percentage concentration of a particular gas that has the potential to be flammable. Most gases have a lower explosive limit (LEL) and an upper explosive limit (UEL). Below the lower limit, there is insufficient gas for the mixture to ignite. Above the upper limit, there is insufficient oxygen to support combustion.

For example, methane or natural gas has a 5% by volume LEL and 17% by volume UEL. The upper limit is not important when considering the risk of explosion, but if the percent volume of methane present was 5% gas (95% AIR) then the gas monitor would display 100% LEL. 

LEL Gas Detection Options

When trying to measure the LEL level inside a building or confined space, there are two different types of detectors: portable gas detectors and fixed gas detectors. 

Portable gas detectors are often issued to maintenance personnel and will emit a loud warning tone if combustible gas is present. This can give the wearer time to evacuate the area, but unless someone is present in an area, the presence of combustible gas will not be identified. 

Fixed LEL gas detectors are permanently installed in a facility and monitor the atmosphere for combustible gases 24 hours per day, seven days per week. This is very important, as dangerous leaks or spills may go unnoticed during nights or weekends.

Fixed LEL detectors are typically installed close to sources of leaks, adjacent to air handler return vents or in the ceiling of an enclosed building or room. In most cases, fixed LEL monitors are connected to a central controller that can sound warning tones or activate strobe lights in the monitored area as well as in a centrally-located control room. The GASMAX II or GASMAX CX are examples of a fixed gas monitor or detector. 

Another type of LEL monitor is called a Sample Draw Monitor or Sample Draw Detector. This device uses a pump to pull a sample from a remote location and push it across the sensor. A sample draw monitor allows the gas detector to be mounted in an area that provides easy access and maintenance while sampling air inside confined spaces like paint cabinets or combustible gas storage rooms. The GDS-58NXP is an example of a sample draw monitor. 

Pro Tip: Protect your facility from the risk of explosion by installing a fixed combustible gas detection system to reliably detect the flammable levels of your gas materials.

Install Gas Detection in Your Facility  

To abide by the local and federal regulations of storing combustible materials, it’s crucial to have a reliable gas detection system in your warehouse. With industry-grade accuracy and nationally recognized hazardous area certifications, our LEL gas monitors/detectors will keep your facility safe.

Does your industry store or work with combustible gases? Connect with our engineers to help you design and install a system to monitor for the presence combustible gases.

Read More

A Guide To The Types Of LEL Gas Detectors You Need In Your Business

Posted by on Nov 13, 2019 in LEL Detector | 0 comments

Whether it is in a water treatment plant, electronics manufacturing facility, offshore drilling platform, or other similar industrial setting, there is always the danger an undetected gas leak will result in a fire, explosion, or other tragic event. Due to these dangers, companies have started to invest in purchasing and installing LEL combustible gas detectors. Designed to be installed in various types of work environments, these Lower Explosive Limit detectors use advanced technology to scan for small amounts of gas that may be in the surrounding atmosphere. Once these amounts exceed certain limits, data can quickly be sent to engineers alerting them to a potentially dangerous situation. To learn more about the types of LEL gas monitors needed for your business, here are some key details regarding their features.

Read More

How To Check A Faulty LEL Monitor?

Posted by on Nov 10, 2019 in LEL Detector | 0 comments

In laboratories and industrial settings of various types, it is critical gas levels be accurately and reliably monitored at all times. Since even the smallest gas leak that goes unnoticed can result in a fire or explosion, workers know this is one area of industrial safety that cannot be overlooked. Because of this, many buildings and complexes now use LEL gas leak detectors that possess sophisticated electronics and alarms. However, due to the many types of harsh work environments in which these detectors are placed, it is always possible problems can develop regarding the detector’s accuracy and reliability. To ensure all goes well, here are some tips on how to check a faulty LEL monitor.

Read More

Don’t Underestimate The Importance Of LEL Correlation Factors

Posted by on Sep 26, 2019 in LEL Detector | 0 comments

In any type of work environment where employees work in isolated areas, it can be difficult to accurately monitor the area for gas levels that may result in fires or explosions. To do so effectively, this requires the use of specialized monitoring devices known as Lower Explosive Limit meters. Commonly referred to as LEL, this type of monitoring plays an important role in various industrial facilities throughout many industries. With many factors at play during the monitoring process, it becomes important to not underestimate even the slightest of details, since overlooking one bit of data could result in tragedy.

Read More

Understanding Catalytic LEL Combustible Gas Sensor

Posted by on Aug 9, 2019 in Catalytic & Infrared Sensors, LEL Detector | 0 comments

When combustible gases are part of the mix, sophisticated systems should be in place to detect dangerous levels of these gases. If this is not the case, the result can be a massive fire or explosion. To keep this from happening, companies rely on catalytic gas detectors. But to make sure the detectors used are the best for a particular work environment, it is important to understand how these detectors function.

Read More

Infrared LEL Gas Sensors – Risk Or Reward?

Posted by on Jul 15, 2019 in LEL Detector | 0 comments

Whether it is a confined space inside a chemical processing plant or an isolated area on a natural gas pipeline or offshore drilling platform, the threat of a toxic or combustible gas buildup is always possible. In these and other work environments, engineers often recommend installing infrared LEL gas leak detectors so that potentially dangerous gas buildups can be quickly detected and stopped before a catastrophic event occurs. While offering many benefits, these detectors also come with many aspects of advanced technology that must be well-understood to ensure maximum effectiveness. To learn if LEL gas detectors are right for you, here is additional information regarding their risks and rewards.

Read More

Sign up to get our new content first!