Tin Dioxide Semiconductor Gas Sensor for Methane Detection - SB-12A-00

  • Tin Dioxide Semiconductor Gas Sensor for Methane Detection
  • Tin Dioxide Semiconductor Gas Sensor for Methane Detection
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• 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: Date Sheet File
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

Standard Operating conditions
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)
Environmental conditions
Symbol
Parameter
Specification
Conditions etc.
Tao
Operating temperature
-10°C to 50°C
Recommended range
Tas
Storage temperature
-30°C to 100°C
RH
Relative humidity
Less than 95% RH
(O2)
Oxygen concentration
21% ± 1%
(Standard condition)

Absolute minimum level:
more than 18%
The sensitivity characteristics are influenced
by the variation in oxygen concentration.

Sensitivity characteristics
Model
SB-12A-00
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)
Ethanol selectivity
≥ 5.0
Rs (at C2H5OH 1000 ppm)
Rs (at CH4 3000 ppm)
Sensitivity of CH4
≥ 9.0
         Rs (in air)          
Rs (at CH4 3000 ppm)
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%
Pre-heating time: more than 48 hours
Low temperature dependency
1.2 ±  0.2
  Rs (CH4 3000 ppm at -10°C )  
Rs (CH4 3000 ppm at 20°C 65%)
High temperature dependency
0.85 ±  0.15
Rs (CH4 3000 ppm at 50°C 60%)
Rs (CH4 3000 ppm at 20°C 65%)
Mechanical characteristics
Items
Conditions
Specifications
Vibration
Frequency:
Acceleration:
Sweep Time:
5 - 500 Hz
1.3 G
40 min.
Should satisfy the
specifications shown in the 
sensitivity characteristics after
test.

Drop
Height:
Number of impacts:
60 cm
3 times

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