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Tin Dioxide Semiconductor Gas Sensor for Refrigerant Detection(HCFCs) - SP-41-00

  • Tin Dioxide Semiconductor Gas Sensor for Refrigerant Detection(HCFCs)
  • Tin Dioxide Semiconductor Gas Sensor for Refrigerant Detection(HCFCs)
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• Target gas: HCFCs (R-22)
• 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: 1 kΩ to 10 kΩ
• Industrial gas leak detector

  • Model Number: SP-41-00
  • Data Sheet: Date Sheet File
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Product Specification

SP-41-00 Gas Sensor for Refrigerant Detection Description
The SP-41 is a tin dioxide semiconductor gas sensor which has a high sensitivity to HCFCs (e.g. Freon: R-22) with reduced sensitivity to other gases such as alcohol.

SP-41-00 Gas Sensor for Refrigerant Detection Application
• Industrial gas leak detector

SP-41-00 Gas Sensor for Refrigerant Detection 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
 40 Ω ± 2 Ω
 at room temperature
PH Heater power consumption
 400 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.
Sensitivity characteristics
Model
 SP-41-00
Symbol
 Parameter
 Specification
 Conditions etc.
RS
 Sensor resistance
 1 kΩ to 10 kΩ
 At 1000 ppm of R-22/air
β
 Ratio of sensor resistance
 0.25 to 0.55
 Rs at 3000 ppm of R-22
Rs at 1000 ppm of R-22
Standard Test Conditions:
 Temp: 20°C ± 2°C
Humidity:65% ± 5%
(in clean air)
VC : 10.0 V ± 1%   
VH : 5.0 V ± 1%    
RL : 10.0 kΩ ± 5%
Pre-heating time: more than 96 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
 Acceleration:
Number of impacts:
 100 G
5 times

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