Fugitive Emissions Monitoring for Gas Leak Detection

Fugitive emissions are unintentional releases of gases such as methane (CH₄), carbon dioxide (CO₂) and volatile organic compounds (VOCs) from industrial systems.

These emissions are often difficult to detect, as they can occur across multiple points including valves, flanges, storage systems and pipelines. Despite being unintentional, they represent a significant environmental and safety risk.

Continuous monitoring of fugitive emissions allows operators to identify leaks early, reduce environmental impact and ensure compliance with increasingly strict emissions regulations.

The Problem

Fugitive emissions are inherently difficult to monitor due to their diffuse and unpredictable nature.

Common challenges include:

• Leaks occurring across multiple distributed sources
• Low concentration gas releases that are difficult to detect
• Intermittent emissions that may go unnoticed during manual inspections
• Harsh industrial environments affecting detection reliability
• Increasing regulatory pressure to monitor and report methane and VOC emissions
• Safety risks associated with flammable or toxic gas accumulation

Traditional inspection methods such as handheld detectors or periodic surveys often miss small or intermittent leaks, leading to under-reporting and increased risk.

The Solution

Continuous gas detection systems provide a reliable and effective method for monitoring fugitive emissions across industrial sites.

Open path and laser-based gas detectors can monitor large areas and detect methane and VOC leaks in real time, allowing operators to respond quickly to abnormal conditions. These systems are often deployed as part of a wider emissions strategy, alongside Atmospheric Vent Gas Monitoring and Biogas Flare Gas Monitoring for AD Plants, where understanding gas release and control is critical.

By integrating detection systems into plant operations, operators can move from reactive leak detection to proactive emissions management.

Technical Insight

What are fugitive emissions?

Fugitive emissions are unintended gas releases from equipment such as valves, pumps, compressors and pipelines, rather than controlled emissions from stacks or vents.

Key gases monitored

Typical gases include:

• Methane (CH₄)
• Volatile Organic Compounds (VOCs)
• Carbon dioxide (CO₂)
• Hydrogen sulphide (H₂S)

Detection technologies

• Open path laser detectors: Monitor gas concentration over long distances, ideal for perimeter and area monitoring
• TDL (Tunable Diode Laser) systems: Provide highly selective and accurate gas detection
• Fixed point sensors: Monitor specific locations such as valves or process equipment
• Portable detectors: Used for inspection and maintenance activities

Continuous vs periodic monitoring

From experience, periodic LDAR (Leak Detection and Repair) programmes alone are often not enough. Continuous monitoring provides real-time visibility and ensures leaks are detected as they occur.

Environmental and regulatory drivers

Methane is a highly potent greenhouse gas, with significantly higher global warming potential than CO₂. Regulations and initiatives such as methane reduction targets are driving increased adoption of continuous monitoring solutions.

Recommended Products

Gas Detectors

Laser-based and open path gas detection systems for continuous monitoring of methane, VOCs and other gases across industrial sites.

Key Benefits

• Continuous detection of methane and VOC emissions
• Early identification of leaks to reduce environmental impact
• Improved safety by detecting flammable and hazardous gases
• Supports regulatory compliance and emissions reporting
• Reduces reliance on manual inspection and LDAR programmes
• Scalable solutions for site-wide monitoring and perimeter detection