Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Properties of Non-dispersive infrared Ethanol Gas Sensors according to the Irradiation Energy

  • Kim, JinHo (Department of Mechanical Engineering, Korea National Unversity of Transportation) ;
  • Yi, SeungHwan (Department of Mechanical Engineering, Korea National Unversity of Transportation)
  • Received : 2017.05.25
  • Accepted : 2017.05.29
  • Published : 2017.05.31
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Abstract

A nondispersive infrared (NDIR) ethanol gas sensor was prototyped with ASIC implemented thermopile sensor, which included a temperature sensor and two ellipsoidal waveguide structures. The temperature dependency of the two ethanol sensors (with partially blocked and intact structures) has been characterized. The two ethanol gas sensors showed linear output voltages initially when varying the ambient temperature from 253 K to 333 K. The slope of the temperature sensor presented a constant value of 15 mV/K. After temperature compensation, the ethanol gas sensor estimated ethanol concentrations with larger errors of 20 to 25% below 200 ppm. However, the estimation errors were reduced to between -10 and +1 % from 253 K to 333 K above 200 ppm ethanol gas concentration in this research.

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References

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