PRODUCT INFORMATION
PRODUCT INFORMATION
Applications:
Features:
TGS 4161 - for the detection of Carbon Dioxide
The figure below represents typical sensitivity characteristics
of TGS4161. The Y-axis is indicated as ∆EMF which is defined
as follows:
∆EMF=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 ∆EMF which is
defined as follows:
∆EMF=EMF1 - EMF2
where
EMF1=EMF in 350 ppm CO2
EMF2=EMF in 1000ppm CO2
* 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 ∆EMF 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.
* High selectivity to CO2
* Compact size
* Low dependency on humidity
* Long life and low cost
* Low power consumption
Humidity Dependency:
Sensitivity Characteristics:
0
20
40
60
80
100
10 100 1000 10000
CO2
CO
Ethanol
H2
∆EMF (mV)
Gas Concentration (ppm)
250
275
300
325
350
0
25
50
75
100
10 20 30 40 50 60 70 80 90
EMF (mV) ∆EMF (mV)
Relative Humidity (%)
EMF (350ppm CO2)
∆EMF (350ppm CO2 - 1000ppm CO2)
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.
PRODUCT INFORMATION
PRODUCT INFORMATION
Structure and Dimensions:
Basic Measuring Circuit:
REV: 12/05
The TGS4161 sensor requires heater
voltage (VH) input. The heater voltage is
applied to the integrated heater in order
to maintain the sensing element at a
specific temperature which is optimal for
sensing. Electromotive force (EMF) of
the sensor should be measured using a
high impedance (>100 GΩ) operational
amplifier with bias current < 1pA (e.g.
Texas Instruments' model #TLC271).
Since the solid electrolyte type sensor
Specifications:
FIGARO USA, INC.
121 S. Wilke Rd. Suite 300
Arlington Heights, IL 60005 USA
Phone: (1)-847-832-1701
Fax: (1)-847-832-1705
email: figarousa@figarosensor.com
functions as a kind of battery, the
EMF value itself would drift using this
basic measuring circuit. However, the
change of EMF value (∆EMF) shows a
stable relationship with the change of
CO2 concentration. Therefore, in order
to obtain an accurate measurement
of CO2, a special microprocessor for
signal processing should be used with
TGS4161. Figaro can provide a special
evaluation sensor module (AM-4-4161)
for TGS4161.
Sensing Element Structure:
For information on warranty, please refer
to Standard Terms and Conditions of Sale
of Figaro USA Inc.
Sensing
element
ø9.2±0.2
12.4±1.0
10.0±1.0
3.6±0.1
1
2
3
43.6±.1
ø8.1±0.2
ø0.55±0.05
ø5.1
90˚
Top view
Side
view
Bottom
view
rebmunledoM 1614SGT
epyttnemelegnisneS etylortcelediloS
sesagtegraT edixoidnobraC
egnarnoitcetedlacipyT mpp000,01~053
scitsiretcarahclacirtcelE
ecnatsiserretaeH
RH07 ±7Ω.pmetmoorta
tnerrucretaeH
IHAm05.xorppa
rewopretaeH
noitpmusnoc P
HWm052.xorppa
ecrofevitomortcelE
FME OCmpp053niVm094~022 2
ytivitisneS ∆FME Vm27~44
OCmpp053(FME
2
-)
OCmpp0053(FME
2
)
egatlovretaeH
VH0.5 ±)CD(V2.0
scitsiretcarahcrosneS emitesnopseR
.nim5.1.xorppa
laniffo%09ot( ∆)eulavFME
ycaruccatnemerusaeM .xorppa ±OCmpp000,1ta%02 2
snoitidnocgnitarepO HR%59~5,C˚05~01-
snoitidnocegarortS HR%09~5,C˚06~02-
)legacilishtiwgabfoorperutsiomnierots(
tsetdradnatS
snoitidnoc
noitidnocsagtseT OC 2riani
02ta ±56,C˚2 ±HR%5
noitidnoctiucriC VH0.5= ±CDV50.0
doirepgninoitidnoC
tseterofeb regnolrosruoh21
Pin Connection:
1. Heater (+)
2. Counter electrode (+)
3. Sensing electrode (-)
4. Heater (-)
u/m = mm
EMF
VH
TGS4161
1 2
4 3
Operational Amplifier
GND
IBIAS < typ. 1pA
+
-
