Edinburgh Instruments Ltd
2 Bain Square , Kirkton Campus , United Kingdom

Edinburgh Sensors, a division of Edinburgh Instruments, is a world-class customer-focused provider of quality gas-sensing solutions.

Since 1980, we have designed and manufactured a comprehensive range of gas sensors based on non-dispersive infrared (NDIR), fail safe gas sensing technology.

The application of our continued research and development has contributed to several major advances in the world of infrared gas sensing and delivered a comprehensive portfolio of products for the detection of CO, CO₂, CH₄ and various refrigerants. Such technology has been widely accepted and standardised by many other gas sensor manufacturers worldwide.

Our diverse range of robust OEM Gas Sensors and Gas Monitors enable fast, reliable and continuous gas detection. With a global reputation for high performance, our products are an ideal solution for those applications where accuracy, safety and reliability are paramount.

We continue to pioneer developments as we explore new opportunities using NDIR and non-NDIR technologies. Backed by our widely recognised technological achievements we are firmly committed to our customers and invest in our people.

Our technology

Our existing product range is based on a no moving parts, non-dispersive infrared (NDIR) gas detection and we are presently working to explore new and exciting technologies.

Benefits of dual wavelength NDIR gas sensor

• Non dispersive infrared technology is fail-safe; the most common failure mechanisms will give a high concentration indication, allowing for investigation.
• The technology is able to detect chemically inactive gases, whose aversion to reaction makes them difficult to detect using chemical methods.
• In the majority of cases IR absorption is highly specific so that a particular gas may be reliably detected in complex compositions of gas.
• There are many situations where IR will work while other methods will fail e.g. the detection of Alcanes in oxygen depleted atmospheres.
• The IR Sensor is not consumed and so has a longer life than most chemical detection methods.
• It is difficult to “poison” an IR sensor.

Edinburgh Sensors dual-wavelength products employ a number of key features:-

• A tubular light guide optical system to transfer the IR radiation from the source to detector and also to act as a gas cell, this arrangement provides a greater than 90% overlap between the two beams thereby maximising sensor stability.
• Electronic source modulation eliminating the need for moving parts.
• A microprocessor to control the source and digitise the signal from the detector so that almost all signal processing is in the digital domain, very fast and free from analogue artefacts.  
• A pressure sensor to allow the true gas concentration to be displayed without the need for an atmospheric pressure correction calculations.
• Our sensors are easy to adapt enabling users to change filters and light sources.