Gas Detectors
for Industrial Gas Monitoring and Leak Detection
Laser-based gas detection systems for accurate, reliable monitoring of emissions, process gases and hazardous environments.
Over 45 Years in Operation
1000's of UK Installations
Supporting 100's of UK Sites
Accurate gas detection is critical for safety, compliance and maintaining control of industrial processes.
Industrial processes often involve gases that are hazardous, corrosive or environmentally regulated, making accurate detection and monitoring essential for safe and compliant operation.
Laser-based gas detection systems provide fast, reliable and highly accurate measurement without the drift or maintenance challenges associated with traditional sensor technologies. These systems are widely used in applications such as atmospheric vent gas monitoring, where low-level emissions must be detected and controlled, and Flare Gas Metering using thermal mass flow measurement, where understanding gas composition supports reporting and compliance.
In safety-critical environments, gas detection also plays a key role in protecting personnel and assets, particularly in areas such as analyser shelter air flow monitoring, where maintaining safe conditions is essential. These systems are also increasingly used across hydrogen and biogas applications where reliable gas measurement supports both safety and process performance.
Allison Engineering provides gas detection solutions using proven laser-based technologies, supporting industrial operators with systems that deliver long-term reliability, minimal maintenance and high measurement confidence.
Gas Detector Products
Our range includes high-accuracy laser-based gas analysers and open path detection systems, designed to provide reliable monitoring across industrial, energy and process environments.
Tunable Diode Laser Gas Detector
A high-accuracy laser-based gas analyser for continuous, multi-point gas monitoring across industrial applications.
Using TDL technology, the system delivers drift-free measurement with no calibration, supporting safety, compliance and control.
Open Path Laser Gas Detector
An open path laser gas detector designed for area-wide leak detection and emissions monitoring across industrial sites.
Measures gas concentrations over long distances, providing early warning of leaks with reliable, low-maintenance performance.
Why Choose Laser-Based Gas Detection
High accuracy measurement
Laser-based systems provide highly accurate gas measurement with minimal drift, ensuring reliable data for safety, control and compliance.
No sensor degradation
Laser systems are not affected by poisoning or degradation, reducing maintenance and improving long-term reliability.
Fast response to gas events
Rapid detection enables early identification of leaks or process changes, helping protect personnel, equipment and the environment.
Suitable for harsh environments
These systems perform reliably in demanding conditions including corrosive gases, temperature variation and hazardous areas.
Flexible installation options
Available as point or open path systems, allowing monitoring of specific locations or large areas depending on application requirements.
Supports safety and compliance
Provides dependable data for emissions reporting, environmental monitoring and safety systems, including SIL-rated applications.
Suitable for Multiple Industry Sectors
Renewable Energy & Biogas
Applicable for monitoring gas composition, emissions and safety across anaerobic digestion and landfill gas sites.
Pharmaceutical
Supports clean and controlled environments where gas monitoring is required for safety and process integrity.
Oil & Gas
Widely used for leak detection, flare gas monitoring and emissions control across upstream, midstream and downstream operations.
Chemical & Process
Supports monitoring of hazardous gases, vent emissions and process control where safety and compliance are critical.
Hydrogen
Used for hydrogen detection and monitoring in production, storage and process applications where safety is essential.
Utilities & Energy
Used across power generation and industrial energy systems where gas monitoring supports operational reliability and compliance.
Need information or advice?
Speak with our friendly, expert team to discuss your requirements and find out how we can help you.
Full Service UK Solutions
Allison Engineering supports gas detection projects from initial specification through to installation and ongoing support, ensuring systems are correctly selected and perform reliably in the field.
Specifications & Planning
Assessment of gas type, detection range, site layout and safety requirements to determine the most suitable detection technology.
Supply & Commissioning
Product supply, installation and first fit support, commissioning and full setup to ensure analysers are working correctly in the field.
Support & Optimisation
Ongoing UK based servicing, calibration, maintenance and technical support to keep analysers accurate and systems performing reliably over time.
Gas Detector FAQs
Explore common questions about gas detection technologies, including how laser-based systems work, where they are used and how to select the right solution.
What is a laser gas detector?
A laser gas detector uses Tunable Diode Laser (TDL) technology to measure gas concentration by analysing how a laser beam is absorbed by a specific gas. This allows highly accurate, selective and stable measurement without the need for physical sensors that degrade over time.
What is the difference between open path and point gas detection?
Point gas detectors measure gas concentration at a specific location, typically within a pipe or enclosed space. Open path systems measure gas concentration across a defined distance, making them ideal for detecting leaks over large areas or along site perimeters.
What gases can be detected using laser-based systems?
Laser-based gas detectors can measure a wide range of gases including methane (CH₄), hydrogen (H₂), oxygen (O₂), carbon dioxide (CO₂), hydrogen sulphide (H₂S) and various hydrocarbon gases. The specific gases depend on the system configuration and application.
Are laser gas detectors suitable for hazardous areas?
Yes, many systems are designed and certified for use in hazardous environments, including ATEX-rated areas. They are commonly used in oil & gas, chemical and energy applications where safety is critical.
How do I choose the right gas detection system?
Selection depends on the gas type, required detection range, site layout, environmental conditions and safety requirements. For example, open path systems are ideal for perimeter monitoring, while point detectors are better suited to process measurement or confined spaces.
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Why Trust Allison Engineering
We are committed to delivering the highest standards across the specialist areas we support, combining proven products with practical engineering knowledge and dependable service.
Need Help Selecting the Right Gas Detection System?
Speak to our team to identify the most suitable gas detection solution for your application, ensuring reliable monitoring, improved safety and long-term performance.