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Minimising CO2 Sensor Power Consumption

07-16-2020 04:25 PM CET | Science & Education

Press release from: Gas Sensing Solutions (GSS)

Gas Sensing Solutions - CozIR Range of Ultra Low Power CO2 Sensors for Indoor Air Quality and HVAC Applications

Gas Sensing Solutions - CozIR Range of Ultra Low Power CO2 Sensors for Indoor Air Quality and HVAC Applications

All GSS sensors use a technique called non‐ dispersive infra‐red (NDIR) sensing where light is injected into the optical measurement chamber, which contains the gas of interest.

The light that passes through the optical cavity is detected by the photo diode. The signal from the photo‐diode is digitised by the microcontroller and compared with a reference level stored in memory. The microcontroller can then calculate the level of CO2 in the optical measurement chamber.

The power consumed by the CO2 sensor depends on several interrelated factors. The type and efficiency of the light source is the largest contributor to the power consumed by the sensor.

In comparison to many other sensors that use incandescent light sources, GSS sensors use a highly efficient Light Emitting Diode (LED) to illuminate the CO2 gas. LEDs can (but not always) be much more efficient in converting electrical power into light than conventional light sources.

The length of time the light source is active is also a major contributor to how much power is consumed by the sensor. The light source in a CO2 sensor can be run continuously or pulsed to minimise overall power consumption.

Today’s semiconductor devices consume much less power than their forebears due to lower supply voltages, effective power management and shrinking feature sizes. Nevertheless, improvements to signal processing strategies for filtering, data handling and communications can improve power savings.

This application note describes the fundamentals that underpin the low power design of GSS sensors and how to calculate the power consumption of each device. Finally, strategies for reducing power consumption whilst optimising overall performance are presented, including the new CozIR®‐Blink sensor.

For the full Application Note, please visit:

Gas Sensing Solutions (GSS)
60-62 Grayshill Road
Westfield North Courtyard
Cumbernauld, United Kingdom, G68 9HQ
Tel: +44 (0) 1236 781 900

Press Contact - Zara V

Gas Sensing Solutions bring your CO2 sensing innovations to life. Our specialist in-house engineering and technical teams have decades of experience in solid-state carbon dioxide gas sensor development. Situated in the UK, we are one of the leading CO2 sensing technology companies within the global market. We can adapt an existing product, or work with clients to develop a complete custom CO2 sensing solution.

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