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TGS4160 Datasheet Preview

TGS4160 Datasheet

Carbon Dioxide Detection

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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.




Figaro

TGS4160 Datasheet Preview

TGS4160 Datasheet

Carbon Dioxide Detection

No Preview Available !

Basic Measuring Circuit:
The TGS4160 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 G) operation-
al amplifier with bias current < 1pA (e.g.
Texas Instruments' model #TLC271).
Since the solid electrolyte type sensor
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
TGS4160. Figaro can provide a special
evaluation sensor module (AM-4) for
TGS4160.
VH
Thermistor
Top View (TGS4160)
16
RH
25
RTh
3
V EMF
4
Thermistor
Operational Amplifier
Input impedance > 100G
Bias current < 1pA
+
-
Vout
Specifications:
Structure and Dimensions:
Model number
Sensing element type
Target gases
TGS 4160
Solid electrolyte
Carbon dioxide
Top view
F I G A RO
Typical detection range
300 ~ 5000 ppm
Heater resistance RH
11.5 ± 1.1at room temp.
Heater current
IH
approx. 250mA
Electrical
characteristics
under standard test
conditions
Heater power
consumption
Heater voltage
Electromotive force
PH
VH
EMF
approx. 1.25W
5.0 ± 0.2V (DC)
220~490mv in 350ppm CO2
Sensitivity
EMF 44~72mV
EMF 350ppm CO2
EMF 3500ppm CO2
Response time
Sensor characteristics
Measurement accuracy
approx. 2 min. (to 90% of final value)
approx. ±20% at 1,000ppm CO2
T G S 4160
ø 24.1±1.0
Operating conditions
Strorage conditions
Standard test
conditions
Test gas conditions
Circuit conditions
Conditioning period
before test
-10~50˚C, 5~95%RH
-20~60˚C, 5~90%RH
(store in moisture proof bag with silica gel)
CO2 in air
at 20±2˚C, 65±5%RH
VH = 5.0±0.05V DC
7 days
White Dot
Sensing Element Structure:
Bottom View (Sensor Element)
C
A
F
D
A: Lead wires
61
Side view (Sensor Element)
B : Pt Heater
F : Sealing Glass
E : Counter Electrode
(Anode)
C : Solid Electrolyte
D : Sensing Electrode
(Cathode)
5
4
2
3
Bottom view
ø9.5 ± 0.2
ø 17.7±1.0
6.0 ± 0.5
Green Dot
24.3 ±1.0
6.0 ± 0.5
5.8 ± 0.3
45˚ ± 1˚30'
ø1.0 ± 0.1
45˚ ± 1˚30'
(u/m = mm)
REV: 10/00


Part Number TGS4160
Description Carbon Dioxide Detection
Maker Figaro
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TGS4160 Datasheet PDF






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