GSS - Low power CO2 sensor demo

GSS Sensor China Exhibition

Gas Sensing Solutions (GSS), a leader in CO2 sensor technology, will be exhibiting at Sensor China Expo 2018 . The company will be on Booth B004 in the Overseas Pavilion from 10 to 12 September 2018.

“China is one of our largest export markets,” said Lily Liu, Business Development Manager at GSS. “We make regular trips to China to support our partners with technical training and advice on designing solutions using our sensors. Naturally, we will also be talking to manufacturers seeking the very best in CO2 sensor technology, as our next generation LED-based sensors set new standards for low power, fast response and robustness.”

Low power CO2 sensor demo

How the CozIR-LP CO2 sensor can be used for Demand Controlled Ventilation (DCV) applications

GSS has a multi award-winning technology that is the basis for its next generation CO2 sensors. Its proprietary mid-infrared LEDs use very little power and turn on almost instantly – giving sensor readings in less than a second. As a result, GSS has pioneered the development of solid-state NDIR CO2 sensors that can be powered by batteries for up to 15 years. Alternative sensors use IR sources that require significantly more power per measurement and also take much longer to reach a stable condition for a measurement, resulting in the need for mains power. Also, being solid-state means that GSS sensors are very robust and stable enabling them to be used in harsh conditions of vibration and pressure changes, such as on vehicles, aircraft or even spacecraft.

GSS has three families of standard products that each focus on a particular strength of its technology. Therefore, designers can select the most appropriate sensor according to the needs of their specific application. The CozIR® family has particularly low power consumption and so provides a long term, low maintenance solution for battery-powered ambient air monitoring systems.

CozIR-LP low power and small CO2 sensor

CozIR-LP low power, small profile CO2 sensor

SprintIR high speed co2 sensor

SprintIR-W high speed sensor

The SprintIR® family provides high speed sensing up to 100% CO2 concentration, for when an ultra-fast measurement result is required. And the ExplorIR® brand is for measuring up to 100% CO2 levels in tough applications, such as those subjected to harsh environments, vibrations, and handling.

100% co2 sensor for tough applications

ExplorIR-W robust sensor

Within each family there are further sub-brands according to specific features, such as size, output and Temperature + Relative Humidity (RH) integration. As the company manufactures its sensors, it also offers a custom CO2 sensor design service.

GSS will have demonstrations on its stand to showcase these three strengths. The CozIR®-LP shows how a battery-powered CO2 sensor can be used for Demand Control Ventilation. The SprintIR®-6S demo shows how fast the sensor responds to changes in CO2. The ExplorIR® robustness is proven by having it working inside a ball being thrown around the stand.


If you would like to meet GSS at the show, please contact us:

Find out more about the Sensor China Expo here:

GSS - co2 sensors for refrigeration applications

GSS Targets Growing CO2 Refrigerant Market

Gas Sensing Solutions (GSS), a leader in CO2 sensor technology, has announced that it is targeting the growing market of CO2 refrigeration systems with its award-winning CO2 sensors.

A century ago, CO2 was commonly used as a refrigerant, but had practically disappeared by the 1950s with the use of other gases such as HVFC, CFC and HFC.1 The air conditioning and refrigeration industry has now been urged to move to more “natural” refrigerants like CO2, with the onset of huge price increases for traditional HFCs.2 The reduction of harmful greenhouse gases is also a key consideration, as these traditional gases contribute up to four thousand times more than CO2 to global warming.3

co2 sensors for refrigeration applications

Measuring CO2 levels in refrigeration applications

Dr David Moodie, Technical Manager at GSS, said, “CO2-based water chillers, chest freezers, beverage coolers and heat pumps are increasingly being developed and commercialised, making this a very exciting new market for us as providers of innovative CO2 sensors.4 For example, CO2-based refrigeration systems are in use in a large number of Swedish supermarkets, with other countries following this trend towards a highly green refrigeration solution.”5

It is important to have CO2 sensors in this application to monitor for potential CO2 leaks. CO2 exists in the atmosphere, and background (normal) outdoor air levels are around 250-350 ppm.6 CO2 is harmless to humans, except when concentrations are four to five times greater than normal. For example, at 2000-5000 ppm, health problems such as headaches, loss of attention and slight nausea may be experienced.7 As CO2 gas is odourless and colourless, leaks could easily go unnoticed. A speedy warning of increased CO2 levels is therefore vital in ensuring people’s safety in CO2 refrigeration applications.

GSS has a range of standard CO2 sensors for refrigeration applications. The ExplorIR®-W is a particularly robust design, built with mid-infrared LED technology at its core. It’s this solid-state technology that enables the earliest warning of any possible CO2 leaks. This also provides the required long lifetime and high precision needed in leak detection applications.

Available with an extended temperature range, the ExplorIR®-W can operate right down to -25º C as required in many supermarket freezers. It is available in measurement ranges of 0-5%, 0-20% and 0-100% CO2 concentrations according to the specific application. The sensor can be adapted for special requirements, or developed into a custom CO2 sensor solution for leak detection applications.

AHR Expo image - Gas sensing solutions

NDIR CO2 Sensor

Gas Sensing Solutions (GSS) Ltd, the LED-based CO2 sensor specialists, will be showcasing it’s low power CoZIR®-LP sensor at the AHR Expo 2018 in Chicago, USA.

CoZIR®-LP a very low power CO2 sensor – up to 80% lower power than typical NDIR CO2 sensors. This makes it the lowest power NDIR CO2 sensor available today.

Its world-leading power consumption and extended lifetime makes it ideal for battery powered systems, such as portable, wearable, handheld, and self-powered applications. This includes IoT applications, like ‘smart homes’ and ‘smart cities’.

At less than 8mm tall, this miniature, lightweight CO2 sensor offers easy integration into gas monitoring and detection systems and has a power consumption of only 3mW.

The sensor is designed for low concentration CO2 environments, with measurement ranges from 0-2000ppm, 0-5000ppm and 0-1%.

CoZIR®-LP is built on GSS’s unique patented LED technology platform and optical designs. It’s this solid-state technology that enables best-in-class power consumption, lifetime and durability.

GSS’ multi-patented LED technology monitors the presence of CO2by sensing how much light is absorbed by CO2 molecules as light passes through the sample gases – known as Non-Dispersive Infrared (NDIR) absorption. CO2 absorbs between 4.2 and 4.4 microns and the amount of light absorbed indicates how much CO2 is present. Typical NDIR CO2 sensors use a heated filament to generate a range of wavelengths in the infrared. This is very energy inefficient as the light must be filtered to only leave the required wavelengths. It also produces a lot of wasted heat. By contrast, GSS developed the world’s first commercial, mid-range IR LEDs that are specifically tuned to emit between 4.2 and 4.4 microns. This makes them very energy efficient, and means they require less energy to take a reading.

See the sensor 

GSS will be showcasing the CoZIR®-LP CO2 sensor on the EnOcean booth – #4126 – at the AHR Expo in Chicago, USA. If you would like to see the sensor for yourself, please contact us and we’ll arrange a convenient time to meet you.

Evaluation kits for the CoZIR®-LP are available to order now – please contact us for a quote. A full technical specification is provided in our datasheet here.