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

• Target gas: Methane
• Heater voltage: 5.0 V ± 4%
• Circuit voltage: 5.0 V ± 4%
• Operating temperature: -10°C to 60°C
• Storage temperature: -20°C to 70°C
• Relative humidity: Less than 95% RH
• Sensor resistance: 4 kΩ to 15 kΩ
• Home gas leak detector

  • Model Number: SP-12A-00
  • Data Sheet: Date Sheet File
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  • Tin Dioxide Semiconductor Gas Sensor for Methane Detection
  • Tin Dioxide Semiconductor Gas Sensor for Methane Detection
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Product Specification

SP-12A-00 Methane Sensor CH4 Sensor Description
The SP-12A is a tin dioxide semiconductor gas sensor which has a good sensitivity and excellent selectivity to methane. The SP-12A has also a significant feature in good stability after exposure to silicone compounds.

Using the SP-12A, the most reliable methane detection can be achieved.

SP-12A-00 Methane Sensor CH4 Sensor Application
• Home gas leak detector

SP-12A-00 Methane Sensor CH4 Sensor Specifications

Standard Operating conditions
Symbol
 Parameter
 Specification
 Conditions etc.
VH
 Heater voltage
 5.0 V ± 4%
 AC or DC
VC Circuit voltage
 5.0 V ± 4%
 AC or DC
RL Load resistance
 Variable
 PS < 15 mW
RH Heater resistance
 42 Ω ± 2 Ω
 at room temperature
PH Heater power consumption
 380 mW (Typical value)
 PH = VH2 / RH
PS
Power dissipation of
sensing element
 Less than 15 mW
 PS =(VC - VRL)2/RS
Environmental conditions
Symbol
 Parameter
 Specification
 Conditions etc.
Tao
 Operating temperature
 -10°C to 60°C
 Recommended range
Tas
 Storage temperature
 -20°C to 70°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. Please consult FIS
for details.
Sensitivity characteristics
Model
 SP-12A-00
Symbol
 Parameter
 Specification
 Conditions etc.
RS
 Sensor resistance
 4 kΩ to 15 kΩ
 at 5000ppm of methane/air
β Sensitivity slope
 0.60 to 0.75
 RS at CH4 7000 ppm
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
Mechanical characteristics
Items
 Conditions
 Specifications
Vibration
 Frequency:
Vertical amplitude:
Duration:
 100 cpm
4 mm
1 hour
 Should satisfy the
specifications shown in the
sensitivity characteristics.
Shock Height:
Number of impacts:
 100 G
5 times

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