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Spectrex Quasar Open Path Gas Detector Series 300

The Spectrex Quasar 300 is purpose-built to monitor gas levels in air ducts ranging from 0.6 to 3.5 meters wide. Its exceptional capabilities enable it to detect the presence of hazardous gases at a remarkable sensitivity level of 1 LEL.m (Lower Explosive Limit per meter). This sensitivity ensures that even the slightest hint of gas leakage is promptly identified, preventing potential disasters and safeguarding personnel, facilities, and the environment.

The key highlight that sets the Spectrex Quasar 300 apart from traditional gas detectors lies in its unrivaled speed and efficiency. Compared to conventional point-type detectors or sampling systems, the Quasar 300 proves to be a true champion, boasting detection speeds that are 20 to 50 times faster. Rapid gas detection is crucial in high-risk environments, where every second counts in preventing accidents and mitigating hazardous situations.

Furthermore, the Spectrex Quasar 300 offers the added benefit of easy installation and integration into existing air duct systems. Its compact design and user-friendly interface allow for seamless implementation, making it an attractive option for both new installations and retrofits.


Spectrex has been a leader in the Flame and Open Path Gas Detectors field since the early 50’s. Being acquired by Emerson/Rosemount in 2015 They are fully committed to enhance the safety of your employees, capital investments and to the environment.

Being the first to launch major innovations that have become trade standards such as the first UV/IR and patented IR3 Flame Detector designs they continue to offer the most comprehensive product line to meet application challenges from offshore oil & gas to waste handling to commercial mall floors worldwide.

Spectrex was first to incorporate the Xenon Flash in open path gas detectors to solve false alarm issues common in the industry.

Today they offer hydrocarbon, and toxic ammonia, sulphoric acid and hydrogen sulphide open path gas detection solutions.

Spectrex is fully committed to continue its innovative approach and development efforts to address the needs of the high risk – high value industries for reliable and unique solutions that provide effective protection against fires and explosions.

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