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Tin Dioxide Semiconductor Gas Sensor for Ammonia Detection - SP-53A-00

  • Tin Dioxide Semiconductor Gas Sensor for Ammonia Detection
  • Tin Dioxide Semiconductor Gas Sensor for Ammonia Detection
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• Target gas: Ammonia
• 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: 9kΩ to 90 kΩ
• Industrial gas leak detector

  • Model Number: SP-53A-00
  • Data Sheet: Date Sheet File
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Product Specification

SP-53A-00 Ammonia Sensor NH3 Sensor Description
The SP-53A is a tin dioxide semiconductor gas sensor which has a good sensitivity to high concentration ranges of ammonia with improved response speed compared with conventional models.

SP-53A-00 Ammonia Sensor NH3 Sensor Application
• Industrial gas leak detector

SP-53A-00 Ammonia Sensor NH3 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.
Sensitivity characteristics
Model
 SP-53A-00
Symbol
 Parameter
 Specification
 Conditions etc.
RS
 Sensor resistance
 9kΩ to 90 kΩ
 At 600 ppm of ammonia/air
β
 Ratio of sensor resistance
 0.15 to 0.35
 Rs at 600 ppm of ammonia
Rs at 200 ppm of ammonia
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
 Acceleration:
Number of impacts:
 100 G
5 times

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