Tin Dioxide Semiconductor Gas Sensor for Methane Detection - SB-12A-00
• Target gas: Methane/Hydrocarbons/Hydrogen
• Operating temperature: -10°C to 50°C
• Storage temperature: -30°C to 100°C
• Relative humidity: Less than 95% RH
• Sensor resistance: 0.2kΩ to 1.0kΩ
• Home gas leak detector
- Model Number: SB-12A-00
- Data Sheet:
- Quantity:
- - +
Product Specification
SB-12A-00 Methane Gas Sensor Description
The SB-12A is a tin dioxide semiconductor gas sensor which has an excellent performance in methane detection with significant low power consumption concept (120mW).
High sensitivity, low sensitivity to noise gases, quick response speed and strong poisoning resistance features achieve reliable gas detection system applications.
SB-12A-00 Methane Gas Sensor Application
• Home gas leak detector
SB-12A-00 Methane Gas Sensor Specifications
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Standard Operating conditions |
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Symbol |
Parameter |
Specification |
Conditions etc. |
|
VH |
Heater voltage |
0.9 V ± 0.05 V |
AC, DC or pulse |
| VC |
Circuit voltage |
Less than 5 V |
DC: Pin2 (+) - Pin 1 (-) |
| RL |
Load resistance |
Variable (> 200 Ω) |
PS < 10 mW |
| RH |
Heater resistance |
2.8 Ω ± 0.2 Ω |
at room temperature |
| IH |
Heater current |
132 mA |
IH = VH / RH (typical value) |
| PH |
Heater power consumption |
120 mW |
PH = VH2 / RH (typical value) |
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Environmental conditions |
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Symbol |
Parameter |
Specification |
Conditions etc. |
|
Tao |
Operating temperature |
-10°C to 50°C |
Recommended range |
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Tas |
Storage temperature |
-30°C to 100°C |
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RH |
Relative humidity |
Less than 95% RH |
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(O2) |
Oxygen concentration |
21% ± 1% (Standard condition) |
Absolute minimum level: more than 18% |
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The sensitivity characteristics are influenced by the variation in oxygen concentration. |
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Sensitivity characteristics |
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Model |
SB-12A-00 |
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Symbol |
Parameter |
Specification |
Conditions etc. |
|
RS |
Sensor resistance |
0.2kΩ to 1.0kΩ |
at CH4 3000 ppm |
|
β |
slope |
0.45 to 0.65 |
Rs (at CH4 3000 ppm)
Rs (at CH4 1000 ppm) |
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Ethanol selectivity |
≥ 5.0 |
Rs (at C2H5OH 1000 ppm) Rs (at CH4 3000 ppm) |
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Sensitivity of CH4 |
≥ 9.0 |
Rs (in air) Rs (at CH4 3000 ppm) |
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Standard Test Conditions: |
Temp: 20°C ± 2°C Humidity:65% ± 5% (in clean air) |
VC : 5.0 V ± 1%
VH : 5.0 V ± 1%
RL : 10 kΩ ± 5%
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Pre-heating time: more than 48 hours |
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Low temperature dependency |
1.2 ± 0.2 |
Rs (CH4 3000 ppm at -10°C ) Rs (CH4 3000 ppm at 20°C 65%) |
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High temperature dependency |
0.85 ± 0.15 |
Rs (CH4 3000 ppm at 50°C 60%) Rs (CH4 3000 ppm at 20°C 65%) |
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Mechanical characteristics |
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Items |
Conditions |
Specifications |
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Vibration |
Frequency: Acceleration: Sweep Time: |
5 - 500 Hz 1.3 G 40 min. |
Should satisfy the specifications shown in the sensitivity characteristics after test. |
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Drop |
Height: Number of impacts: |
60 cm 3 times |
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