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PDF TGS831 Data sheet ( Hoja de datos )
| Número de pieza | TGS831 | |
| Descripción | Sensor | |
| Fabricantes | Figaro | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TGS831 (archivo pdf) en la parte inferior de esta página. Total 2 Páginas | ||
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FIGARO
PRODUCT INFORMATION
TGS 831 - for the detection of Chlorofluorocarbons (CFC's)
Features:
* High sensitivity to R-21 and R-22
* Low dependency on temperature and
humidity
* Quick response
* Uses simple electrical circuit
* Ceramic base resistant to severe
environment
Applications:
* Refrigerant leak detector
The sensing element of Figaro gas sensors is a tin dioxide (SnO2) semiconductor
which has low conductivity in clean air. In the presence of a detectable gas, the
sensor's conductivity increases depending on the gas concentration in the air. A
simple electrical circuit can convert the change in conductivity to an output signal
which corresponds to the gas concentration.
The TGS 831 has high sensitivity to R-21 and R-22. Due to its low dependence on
temperature and humidity, the sensor has good reproducibility in measurement and
excellent stability. Combined with its long life, this makes TGS 831 an excellent, low-
cost sensor for CFC detection.
The figure below represents typical sensitivity char-acteristics,
all data having been gathered at standard test conditions (see
reverse side of this sheet). The Y-axis is indicated as sensor
resistance ratio (Rs/Ro) which is defined as follows:
Rs = Sensor resistance of displayed gases at
various concentrations
Ro = Sensor resistance at 1000ppm of R-22
The figure below represents typical temperature and humidity
dependency characteristics. Again, the Y-axis is indicated as
sensor resistance ratio (Rs/Ro), defined as follows:
Rs = Sensor resistance at 1000ppm of R-22
at various temperatures/humidities
Ro = Sensor resistance at 1000ppm of R-22
at 20°C and 65% R.H.
Sensitivity Characteristics:
50
30
10
Temperature/Humidity Dependency:
3
Air 2
1
0.5
0.3
0.1
100
300 500 1000
Concentration (ppm)
R-22
R-21
3000
1
0.9
0.8
0.7
0.6
0.5
-20
R.H.
35%
65%
100%
0 20 40
Ambient Temperature (°C)
60
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| Páginas | Total 2 Páginas | |
| PDF Descargar | [ Datasheet TGS831.PDF ] | |
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