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TGS4160 데이터시트 PDF




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부품번호 TGS4160 기능
기능 Carbon Dioxide Detection
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TGS4160 데이터시트, 핀배열, 회로
PRODUCT INFORMATION
TGS 4160 - for the detection of Carbon Dioxide
Features:
* High selectivity to CO2
* Compact size
* Low dependency on humidity
* Long life
Applications:
* Air quality control
* Fermentation process control
The TGS4160 is a hybrid sensor unit composed of a carbon dioxide sensitive
element and a thermistor. The CO2 sensitive element consists of a solid
electrolyte formed between two electrodes, together with a printed heater (Pt)
substrate. By monitoring the change in electromotive force (EMF) generated
between the two electrodes, it is possible to measure CO2 gas concentration.
Adsorbent (zeolite) is filled between the internal cover and the outer cover for
the purpose of reducing the influence of interference gases.
TGS4160 displays good long term stability and shows excellent durability
against the effects of high humidity through the application of innovative
technology in the sensor's electrode design.
The figure below represents typical sensitivity characteristics of
TGS4160. 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
Sensitivity Characteristics:
80
CO2
CO
EtOH
60
The figure below shows typical humidity dependency for an
energized sensor. 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
Humidity Dependency:
430 70
400 60
370 EMF (350ppm CO2) 50
340 40
40
310 30
20
280 EMF (350ppm CO2 - 1000ppm CO2)
20
250 10
0
100
1000
Gas Concentration (ppm)
10000
220
0
20 40 60 80
Relative Humidity (%)
0
100
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.




TGS4160 pdf, 반도체, 판매, 대치품
TECHNICAL INFORMATION FOR TGS4160
1. Specifications
1-1 Features
* High selectivity to carbon dioxide
* Low humidity dependency
* Small size
* Long life
1-2 Applications
* Air quality control
* Fermentation process control
* CO2 gas control for incubators
1-3 Structure
Figure 1 shows the structure of TGS4160. The
TGS4160 is a hybrid composed of a carbon dioxide
sensing element and an internal thermistor. The CO2
sensing element consists of a cation (Na+) solid
electrolyte formed between two electrodes together
with a printed heater (Pt) substrate. The cathode
(sensing element) consists of lithium carbonate and
gold, while the anode (counter electrode) is made of
gold. The anode is connected to sensor pin No.3
(“S(+)”) while the cathode is connected to pin No.4
(“S(-)”). A Pt heater connected to pins No.1 (“H”) and
No.6 (“H”) heats the sensing element. An internal
thermistor connected to pins No.2 and No.5 detects
the environmental temperature in order to compen-
sate for the sensor’s temperature dependency.
Lead wires are made of Pt at 0.1mm diameter, and
these wires are spot welded to nickel pins. The sensor
base is made of polyethylene terephthalate reinforced
with glass fiber. The internal cover is a double layer
of 100 mesh stainless gauze (SUS316). The cover is
fastened to the sensor base with a nickel plated brass
ring. External housing material consists of reinforced
polyamide resin. A layer of 60 Mesh stainless steel
gauze (SUS 304) is used for the outside cover. The
space between the internal and outer covers is filled
with adsorbent (zeolite) for the purpose of reducing
the influence of interference gases.
1-4 Operation principle
When the sensor is exposed to CO2 gas , the following
electrochemical reaction occurs:
Cathodic reaction: 2Li+ + CO2 + 1/2O2 + 2e- = Li2CO3
Anodic reaction: 2Na+ + 1/2O2 + 2e- = Na2O
Overall chemical reaction:
Li2CO3 + 2Na+ = Na2O + 2Li+ + CO2
Revised 03/00
Top View
A
B
A
Bottom View (Sensor Element)
F
CD
A: Lead wires
A
Side view (Sensor Element)
B : Pt Heater
F : Sealing Glass
E : Counter Electrode
(Anode)
C : Solid Electrolyte
D : Sensing Electrode
(Cathode)
SUS304 60 mesh
Non-woven Fabric
Zeolite Filter
SUS316 100 mesh
Sensor Element
Internal Thermistor
Lead Pins
Fig. 1 - Sensor structure
VH
Thermistor
Top View (TGS4160)
16
RH
25
3 RTh
V EMF
4
Thermistor
Operational Amplifier
Input impedance > 100G
Bias current < 1pA
+
-
Vout
Fig. 2 - Basic measuring circuit
2

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TGS4160 전자부품, 판매, 대치품
TECHNICAL INFORMATION FOR TGS4160
2-3 Humidity dependency
Figure 6 shows the humidity dependency of
TGS4160. As this figure illustrates, the sensor shows
very small dependency on humidity for both absolute
EMF and EMF values.
350
325
300
EMF (350ppm CO2)
100
75
50
2-4 Heater voltage dependency
Figure 7 shows the change in EMF at 350 ppm of CO2
according to variations in heater voltage (VH).
Note that 5.0±0.2 V as a heater voltage must be
maintained because variation in applied heater
voltage will cause the sensor’s characteristics to be
greatly changed from those shown as typical in this
brochure.
275 25
EMF (350ppm CO2 - 1000ppm CO2)
250 0
10 20 30 40 50 60 70 80
Relative Humidity (%)
Fig. 6 - Humidity dependency
(20˚C)
400
380
360
340 350ppm CO2
320
300
4.7 4.8 4.9 5.0 5.1
Heater Voltage (V)
Fig. 7 - Heater voltage dependency
5.2
5.3
2-5 Gas response
Figure 8 shows the change pattern of absolute EMF
values when the sensor is placed into 1,000 and 2,000
ppm of CO2 for 10 minutes before being returned to
normal air. The response time to 90% of the saturated
signal level is around two minutes while recovery to
90% of the base level is within 4 minutes.
360
350
340
330
320
310
300
0
1000ppm
CO2
10
2000ppm
CO2
20 30
Time (min.)
Fig. 8 - Gas response speed
40
50
Revised 03/00
5

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관련 데이터시트

부품번호상세설명 및 기능제조사
TGS4160

Carbon Dioxide Detection

Figaro
Figaro
TGS4161

CO2 Sensor

Figaro
Figaro

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