CO2 sensors by GVZ

All our sensors manufactured by GSS 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, compared with a reference level stored in memory and then converted in level of CO2.

The power consumed by the CO2 sensor depends on several interrelated factors. The light source is the largest contributor to the power consumed by the sensor. GSS use a highly efficient Light Emitting Diode (LED) to illuminate the CO2 gas.

The length of time the light source is active is also a major contributor to how much power is consumed by the sensor. This light source can be run continuously or pulsed to minimise overall power consumption. Pulsed LED reduces power consumption by up to 95% compared with continuous operation.

CozIR®-Blink – Lowest Power Sensor for CO2 detection

The CozIR®-Blink contains the ultimate technology with the goal to minimize the power consumption, reaching the incredible average value of 3.47µW of energy consumed (Taking 16 measurement every 2 Hours). This value can also be reduced further down to 0.22µW, taking only 1 measurement every 2 hours.

To give a better idea, a single AA battery (2Ah) would energize the CozIR®- Blink for 200 years (taking 16 measurement every 2h)!

This result is reached also with improvements to signal processing strategies for filtering, data handling and communications. The measurement is held in memory and all other functions are stopped.

All GSS CO2 sensors have been optimised for use in battery power applications. The Blink version is the ultimate solution developed specifically for this usage.

More details are available in GVZ website in the GSS section.

Please contact our Service Team if you have any questions or need additional information.

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