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Low power   Compact size   For indoor ventilation control in residences and high occupancy buildings - Figaro Engineering


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Jfigaro
PRODUCT INFORMATION
TGS 4161 - for the detection of Carbon Dioxide Features: Applications:
* High selectivity to CO2
* Compact size
* Low dependency on humidity
* Long life and low cost
* Low power consumption
* 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 AEMF 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 AEMF which is defined as follows:
AEMF=EMF1 - EMF2 whiere
EMF1=EMF in 350 ppm CO2 EMF2=EMF in listed gas concentration
Sensitivity Characteristics: 100
The figure below shows typical humidity dependency of TGS4161. Again, the Y-axis is indicated as AEMF which is defined as follows:
AEMF=EMF1 - EMF2
whiere
EMF1=EMF in 350 ppm CO2 EMF2=EMF in 1000ppm CO2
Humidity Dependency:
350
100
EMF
- (350
ppm C
O2)
ŕ
'-er
—ŕ-
--
-k-
-i
k—±
L
iEMF
(350p
pm CC
)2 - 1C
00pp
CO2
)
CO2 CO
Ethanol H2
80
325
75
> e,
LL LU
m
TI
m
e,
Li. LU
300
50
20
275
25
0
250
0
10 20 30 40 50 60 70 80 90 Relative Humidity (%)
10 100 1000
Gas Concentration (ppm)
10000
IMPORTANT NOTE: OPERATING CONDITIONS IN WHICH FIGARO SENSORS ARE USED WILL VARY WITH EACH CUSTOMER'S SPECIFIC APPLICATIONS. FIGARO STRONGLY RECOMMENDS CONSULTING OUR TECHNICAL STAFF BEFORE DEPLOYING FIGARO SENSORS IN YOUR APPLICATION AND, IN PARTICULAR, WHEN CUSTOMER'S TARGET GASES ARE NOT LISTED HEREIN. FIGARO CANNOT ASSUME ANY RESPONSIBILITY FOR ANY USE OF ITS SENSORS IN A PRODUCT OR APPLICATION FOR WHICH SENSOR HAS NOT BEEN
SPECIFICALLY TESTED BY FIGARO.

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