Tin Dioxide Semiconductor Gas Sensor for CO and Methane - SB-95-12

• Target gas: Carbon Monoxide/Methane
• Heater voltage (high): 0.9 V ± 5%
• Heater voltage (low): 0.2 V ± 5%
• Circuit voltage: Less than 5 V
• Operating temperature: -10°C to 60°C
• Storage temperature: -30°C to 100°C
• Relative humidity: Less than 95% RH

  • Model Number: SB-95-12
  • Data Sheet: Date Sheet File
Quantity:
- +
  • Tin Dioxide Semiconductor Gas Sensor for CO and Methane
  • Tin Dioxide Semiconductor Gas Sensor for CO and Methane
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Product Specification

SB-95-12 Carbon Monoxide and Methane Sensor Description
The SB-95-12 is a tin dioxide semiconductor gas sensor which has an excellent performance in detecting both CO and methane selectively with single sensor element. This unique feature was realized by using a mini-bead type sensing element with a periodic temperature change operation method.


SB-95-12 Carbon Monoxide and Methane Sensor Application
• Home gas leak detector

SB-95-12 Carbon Monoxide and Methane Sensor Specifications

Standard Operating conditions
Symbol
Parameter
Specification
Conditions etc.
VH (H)
Heater voltage (high)
0.9 V ± 5%
AC, DC or pulse
VH (L)
Heater voltage (low)
0.2 V ± 5%
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
TH (H)
Heating time (high)
5 sec ± 0.1 sec

TH (L)
Heating time (low)
20 sec ± 0.1 sec

IS (H) Current consumption (high)
132mA ± 15mA
VH=0.9V
IS (L) Current consumption (low)
59mA ± 10mA
VH=0.2V
PS
Power dissipation
Less than 10 mW

Environmental conditions
Symbol
Parameter
Specification
Conditions etc.
Tao
Operating temperature
-10°C to 60°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. Please consult FIS
for details.

Sensitivity characteristics
Model
SB-30-00
Symbol
Parameter
Specification
Conditions etc.
RS(L)
Sensor resistance at LOW period
4.5 kΩ - 40 kΩ
at 100ppm of CO
α(L)(30-100)
Sensitivity slope (30 - 100 ppm)
0.35 to 0.65
log (RS(30 ppm) / RS(100 ppm))
log (30/100)

α(L)(100-300)
Sensitivity slope at LOW period
0.5 to 1.0
log (RS(300 ppm) / RS(100 ppm))
log (300/100)
RS(H) Sensitivity resistance at HIGH period
0.2 kΩ - 2.3 kΩ
at 3000ppm of methane
β(H) Sensitivity slope at HIGH period
0.45 to 0.65
RS(3000 ppm) / RS(1000 ppm)
Standard Test Conditions:
Temp: 20°C ± 2°C
Humidity: 65% ± 5%
(in clean air) 


VC : 5.0 V ± 5%          
VH (high) : 0.9 V ± 5%
VH (low) : 0.2 V ± 5% 
RL (high) : 750Ω ± 1%
RL (low) : 10 kΩ ± 1%
Pre-heating time: more than 4 days
Mechanical characteristics
Items
Conditions
Specifications
Vibration
Frequency:
Acceleration:
Sweep time:
5 - 500 Hz
1.3G
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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