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Tin Dioxide Semiconductor Gas Sensor for CO Detection - SB-500-12

  • Tin Dioxide Semiconductor Gas Sensor for CO Detection
  • Tin Dioxide Semiconductor Gas Sensor for CO Detection
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• Target gas: Carbon Monoxide
• 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
• Sensor resistance: 4.5 kΩ - 40 kΩ

  • Model Number: SB-500-12
  • Data Sheet: Date Sheet File
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Product Specification

SB-500-12 Carbon Monoxide Sensor CO Sensor Description
The SB-500-12 is a tin dioxide semiconductor gas sensor which has an excellent performance in CO detection. Using a mini-bead type sensing element with a periodic temperature change operation method, high sensitivity, selectively, small effect from humidity and other remarkable characteristics have been achieved. The SB-500-12 realizes the development of reliable CO detection devices.

SB-500-12 Carbon Monoxide Sensor CO Sensor Application
• Home gas leak detector

SB-500-12 Carbon Monoxide Sensor CO 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
DT (L)
 Detection timing (low)
 < 0.1 sec
 before switching to LOW
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-500-12
Symbol
 Parameter
 Specification
 Conditions etc.
RS
 Sensor resistance
 4.5 kΩ - 40 kΩ
 at 100ppm of CO
α(30-100)
 Sensitivity slope (30 - 100 ppm)
 1.05 to 2.1
 log (RS(30 ppm) / RS(100 ppm))
log (30/100)
α(100-300)
 Sensitivity slope (100 - 300 ppm)
 0.5 to 1.0
log (RS(300 ppm) / RS(100 ppm))
log (300/100)
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          : 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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