GSS has created a new CO2 detector that can take up to 20 readings per second, which is a world record for NDIR CO2 detectors, and has a six times faster response rate than the current sensor named SprintIR. The new sensor, called SprintIR6S, opens up whole new application areas for CO2 monitors that could never be addressed by slow responding sensors based on traditional IR sources, according to the firm.
The SprintIR6S is designed for high speed sensing requirements, and for applications that require capture of rapidly changing CO2 concentrations. This encompasses a wide range of industries and applications, such as industrial and safety markets, and breath analysis applications, such as: capnography, fitness testing, sports science, veterinary, food packaging, and food transportation and refrigeration.
In health areas, the sensor can capture rapidly changing CO2 concentrations in the breathing cycle to provide diagnostic information, which can be used in fitness testing, breath analysis/measurement, capnography, sports science and veterinary to name a few.
In industrial health and safety applications, such as factories where CO2 is used for modified atmospheres to delay packaged food from spoiling, the sensor can provide ultra fast detection of rising CO2 levels.
The sensor measures less than a cubic inch (23.8mm in diameter and 24mm tall). It operates at between 3.25 and 5.5V, with a power consumption of only 35mW. The sensor is available in measurement ranges from 0%to 100%.
Ralph Weir, GSS’ CEO, explained, “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. Typical NDIR CO2 detectors take several seconds or even minutes to take a reading – because they use slow-reacting IR sources, which need time and energy to warm up, like MEMS hotplates, micro-bulbs or filament-based micro-lamp technologies.
“Our LEDs, by contrast, are Solid State emitters, and illuminate almost instantly. With the new SprintIR6S, we’ve also minimised the sample volume down to only 2ml, which enables us to achieve our fastest ever response rates. This puts us in a unique position to open whole new application areas for CO2 monitors that could never be addressed by slow responding sensors based on traditional IR sources”, he added.
“A leak from a CO2 canister or similar can push CO2 levels up from the normal 400ppm to several thousand ppm in seconds,” added Ralph Weir. “You cannot smell CO2 and it is colourless. Yet it can present serious health problems at raised concentrations so, the sooner an alarm is raised, the sooner people can take remedial action. For example, restaurants and pubs usually have CO2 cylinders in the basement for the drinks but basements typically have poor ventilation so an undetected CO2 leak could suddenly raise the CO2 level when someone was in the basement and render them unconscious – or dead. Our new sensors can give the earliest possible warning.”
The sensor boasts the firm’s SmartIR technology to detect the presence of CO2 by detecting how much light is absorbed by CO2 molecules as light passes through the sample gases – called Non-Dispersive InfraRed (NDIR) absorption. CO2 absorbs between 4.2 and 4.4 microns so that its presence is easily detected, and the amount of light absorbed indicates how much CO2 is present.
GSS said it has developed commercial, mid-range IR LEDs that are specifically tuned to emit just at 4.2 to 4.4 microns, making them highly energy efficient. “Therefore, GSS CO2 sensors are the only NDIR CO2 sensors that can be powered by batteries – a single lithium cell can power a SmartIR sensor for up to ten years”, contended GSS.
GSS will be revealing the new SprintIR6S detectors on Stand 1-634 at the Sensor + Test show in Nuremberg, Germany from 30 May to 1 June 2017. SprintIR6S evaluation kits and products can be ordered from June 2017.
For further details, view the full Press release.