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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 process control.
The TDL Gas Detector is a high-accuracy laser-based gas analyser designed for continuous monitoring of gas concentrations in industrial and hazardous area applications.
Using Tunable Diode Laser (TDL) technology, the system provides fast, reliable and drift-free gas measurement without the need for routine calibration or sensor replacement. Available in both field-mounted and rack-mounted multi-channel configurations, the system can monitor multiple measurement paths and gases simultaneously, making it ideal for plant-wide gas monitoring and process control.
The system uses remote measurement heads connected via fibre optic or cable infrastructure, enabling flexible installation across large sites while maintaining a centralised analyser. With SIL2 suitability, hazardous area certification and ±2% reading accuracy, it is widely used in applications where reliability, safety and measurement confidence are critical.
Allison Engineering supports the specification and integration of TDL gas detection systems as part of complete process monitoring and safety solutions.
Key Features & Capabilities
- Tunable Diode Laser (TDL) technology for high accuracy gas measurement
- ±2% of reading accuracy with no drift over time
- No routine calibration or sensor replacement required
- Multi-channel capability (up to 8 measurement paths)
- Dual gas measurement capability within a single analyser
- Field-mounted or rack-mounted configurations available
- Remote measurement heads for flexible installation across large sites
- SIL2 suitability and hazardous area certification
- Fibre optic or cable-based communication up to ~300m distances
- Integrated data logging and multiple communication outputs (HART, Modbus, relays)
Typical Applications
- Atmospheric vent gas monitoring
- Flare gas measurement and emissions reporting
- Hydrogen and process gas monitoring
- Chemical injection and process control
- Analyser shelter and enclosure monitoring
- Safety-critical gas detection (SIS systems)
- Biogas and landfill gas monitoring
Over 45 Years in Operation
1000's of UK Installations
Supporting 100's of UK Sites
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