Sprint provides faster CO2 sensing

May 16, 2017 // By Peter Clarke
Gas Sensing Solutions Ltd. (Cumbernauld, Scotland), a vendor of LED-based non-dispersive infrared (NDIR) detectors for carbon gases, has launched the SprintIR6S unit that can take 20 CO2 readings per second.

GSS claims this is a world record for NDIR CO2 detectors and six times faster than the current SprintIR.

SmartIR detects how much light is absorbed by CO2 molecules as light passes through the sample gases.  CO2 absorbs at optical wavelengths of between 4.2 and 4.4 microns and the amount of light absorbed indicates how much CO2 is present. Typically, CO2 detectors use a miniature heater to generate a range of wavelengths that have to be filtered down to the wavelengths needed, which is wasteful and energy inefficient, especially as a lot of heat is produced. By contrast, GSS has developed mid-range IR LEDs that are specifically tuned to emit just at 4.2 to 4.4 microns. As a result, GSS CO2 sensors can be powered by batteries - a single lithium cell can power a SmartIR sensor for up to ten years.

The SprintIR6S unit measures 23.8mm in diameter by 24mm tall and operates at between 3.25 and 5.5V, with a power consumption of 35mW.

"We are the only company producing CO2 sensors using LEDs and photodiodes and, as we make the LEDs and photodiodes ourselves, we have been able to develop ultra-fast response times that no other NDIR sensor can match," said Ralph Weir, CEO of GSS. "With the new SprintIR6S, we've also minimised the sample volume down to only 2 milliliters, which enables us to achieve our fastest ever response rates."

Applications that could make use of fast response rates include fitness testing, breath analysis/measurement, sports science, veterinary and industrial health and safety. 

SprintIR6S evaluation kits and products can be ordered from June 2017.

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