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TGS813 데이터시트 PDF




Figaro에서 제조한 전자 부품 TGS813은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


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부품번호 TGS813 기능
기능 Detection of Combustible Gases
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TGS813 데이터시트, 핀배열, 회로
TECHNICAL INFORMATION FOR TGS813
Technical Information for Combustible Gas Sensors
Figaro TGS 8-series sensors are a
type of sintered bulk metal oxide
semiconductor which offer low
cost, long life, and good
sensitivity to target gases while
utilizing a simple electrical
circuit. The TGS813 displays
high selectivity and sensitivity to
LP Gas and methane.
Page
Specifications
Features..........................................................................2
Applications...................................................................2
Structure..........................................................................2
Basic measuring circuit....................................................2
Circuit & operating conditions.........................................3
Specifications..............................................................................3
Dimensions...............................................................................3
Basic Sensitivity Characteristics
Sensitivity to various gases................................................4
Temperature and humidity dependency............................5
Heater voltage dependency..........................................................6
Gas response....................................................................................6
Initial action........................................................................7
Long term characteristics.............................................................7
www.daRevtiaseds9/9h9 eet4u.com
See also Technical Brochure ‘Technical Information on Usage of TGS
Sensors for Toxic and Explosive Gas Leak Detectors’.
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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TGS813 pdf, 반도체, 판매, 대치품
TECHNICAL INFORMATION FOR TGS813
2. Basic Sensitivity Characteristics
2-1 Sensitivity to various gases
Figure 4 shows the relative sensitivity of TGS813 to
various gases. The Y-axis shows the ratio of the
sensor resistance in various gases (Rs) to the sensor
resistance in 1000ppm of methane (Ro).
Using the basic measuring circuit illustrated in Figure
2, these sensitivity characteristics provide the sensor
output voltage (VRL) change as shown in Figure 5.
NOTE:
All sensor characteristics in this technical brochure
represent typical sensor characteristics. Since the Rs
or output voltage curve varies from sensor to sensor,
calibration is required for each sensor (for additional
information on calibration, please refer to the Technical
Advisory ‘Technical Information on Usage of TGS Sensors
for Toxic and Explosive Gas Leak Detectors’).
10
Air
CO
1
Methane
Ethanol
Propane
Isobutane
Hydrogen
0.1
500
1000
3000 5000 10000
Concentration (ppm)
Fig. 4 - Sensitivity to various gases (Rs/Ro)
5
Hydrogen
4
Iso-butane
Propane
Ethanol
Methane
3
2
CO
1
Air
0
0 2000
Vc=5.0V
RL=Rs in 1000ppm methane
4000 6000 8000 10000 12000
Concentration (ppm)
Fig. 5 - Sensitivity to various gases (VRL)
Revised 9/99
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TGS813 전자부품, 판매, 대치품
TECHNICAL INFORMATION FOR TGS813
2-6 Initial action
Figure 11 shows the initial action of the sensor
resistance (Rs) for a sensor which is stored unenergiz-
ed in normal air for 30 days and later energized in
clean air.
The Rs drops sharply for the first seconds after
energizing, regardless of the presence of gases, and
then reaches a stable level according to the ambient
atmosphere. Such behavior during the warm-up
process is called “Initial Action”.
Since this ‘initial action’ may cause a detector to alarm
unnecessarily during the initial moments after
powering on, it is recommended that an initial delay
circuit be incorporated into the detector’s design (refer
to Technical Advisory ‘Technical Information on Usage
of TGS Sensors for Toxic and Explosive Gas Leak
Detectors’). This is especially recommended for
intermittent-operating devices such as portable gas
detectors.
1000
100
10
1
0.1
-2
0 2468
Time (min)
Fig. 11 - Initial action
10 12
2-7 Long-term characteristics
10
Figure 13 shows long-term stability of TGS813 as
measured for more than 8 years. The sensor is first
energized in normal air. Measurement for 1
confirming sensor characteristics is conducted under
ambient air conditions rather than in a temperature/
humidity controlled environment. The cyclic change
in sensitivity corresponds to the seasonal changes of
0.1
0
400 800 1200 1600 2000 2400 2800 3200
temperature/humidity in Japan (peak T/H conditions
Elapsed time (days)
occur in July, as corresponds with the sensitivity peaks in
this chart). The Y-axis represents the ratio of sensor
Fig. 12 - Long term stability
(Ro = Rs on day 1)
resistance in 1000ppm of methane on the date tested
(Rs) to sensor resistance in 1000ppm of methane at
the beginning of the test period (Ro).
As this chart illustrates, TGS813 shows stable
characteristics over a very long period of time.
Revised 9/99
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