Carbon Dioxide Sensor

Features:

* High selectivity to CO2
* Compact size
* Low dependency on humidity
* Long life and low cost
* Low power consumption

Applications:

* Indoor air quality control
* CO2 monitors

TGS4161 is a new solid electrolyte CO2 sensor which offers miniaturization and
low power consumption. A range of 350~10,000ppm of carbon dioxide can be
detected by TGS4161, making it ideal for indoor air control applications.
The CO2 sensitive element consists of a solid electrolyte formed between two
electrodes, together with a printed heater (RuO2) substrate. By monitoring the
change in electromotive force (EMF) generated between the two electrodes, it
is possible to measure CO2 gas concentration.
The top of the sensor cap contains adsorbent (zeolite) for the purpose of
reducing the influence of interference gases.
TGS4161 exhibits a linear relationship between DEMF and CO2 gas concentration
on a logarithmic scale. The sensor displays good long term stability and shows
excellent durability against the effects of high humidity.

The figure below represents typical sensitivity characteristics of
TGS4161. The Y-axis is indicated as DEMF which is defined as
follows:
DEMF=EMF1 - EMF2
where
EMF1=EMF in 350 ppm CO2
EMF2=EMF in listed gas concentration

The figure below shows typical humidity dependency of
TGS4161. Again, the Y-axis is indicated as DEMF which is
defined as follows:
DEMF=EMF1 - EMF2
where
EMF1=EMF in 350 ppm CO2
EMF2=EMF in 1000ppm CO2