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PDF TGS-813 Data sheet ( Hoja de datos )
| Número de pieza | TGS-813 | |
| Descripción | Detection of Combustible Gases | |
| Fabricantes | Figaro | |
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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.
1
1 page  
TECHNICAL INFORMATION FOR TGS813
2-2 Temperature and humidity dependency
2.0
Figure 6 shows the temperature and humidity
dependency of TGS813. The Y-axis shows the ratio
of sensor resistance in 1000ppm of methane under
various atmospheric conditions (Rs) to the sensor
resistance in 1000ppm of methane at 20˚C/65%RH
(Ro).
R.H.
(˚C)
-10
0%R.H.
1.860
20%R.H. 40%R.H. 65%R.H. 100%R.H.
1.742
1.676
1.609
1.556
0
1.792
1.523
1.441
1.353
1.303
10
1.733
1.346
1.247
1.150
1.102
20
1.684
1.211
1.095
1.000
0.955
30
1.643
1.117
0.984
0.903
0.861
40
1.612
1.065
0.914
0.858
0.820
Table 1 - Temperature and humidity dependency
(typical values of Rs/Ro for Fig. 6)
0% R.H.
1.5
1.0
0.9
0.8
0.7
-10
20% R.H.
40% R.H
65% R.H.
100% R.H.
0 10 20 30 40
Ambient Temperature (°C)
50
Fig. 6 - Temperature and humidity dependency (Rs/Ro)
10
-10˚C/0%RH
20˚C/65%RH
40˚C/100%RH
Table 1 shows a chart of values of the sensor’s
resistance ratio (Rs/Ro) under the same conditions
as those used to generate Figure 6.
1
Figure 7 shows the sensitivity curve for TGS813 to
methane under several ambient conditions. While
temperature may have a large influence on absolute
Rs values, this chart illustrates the fact that effect on
the slope of sensor resistance ratio (Rs/Ro) is not
significant. As a result, the effects of temperature on
the sensor can easily be compensated.
0.1
100
For economical circuit design, a thermistor can be
incorporated to compensate for temperature (for
additional information on temperature compensation in
circuit designs, please refer to the Technical Advisory
‘Technical Information on Usage of TGS Sensors for Toxic
and Explosive Gas Leak Detectors’).
1000
10000
Concentration(ppm)
Fig. 7 - Resistance change ratio
under various ambient conditions
100000
Revised 9/99
5
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| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet TGS-813.PDF ] | |
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