• voc gas sensor

GM-502B MEMS VOC Gas Sensor

  • • Detection: Alcohol (C2H5OH), 10–500ppm
  • • Detection: Hydrogen(H2 ), 1 – 1000ppm
  • • Detection: Formaldehyde(CH2O), 10-100ppm

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Principle Introduction:
MEMS VOC gas sensor is using MEMS micro-fabrication hot plate on a Si substrate base, gas-sensitive materials used in the clean air with low conductivity metal oxide semiconductor material. When the sensor exposed to gas atmosphere, the conductivity is changing as the detected gas concentration in the air. The higher the concentration of the gas, the higher the conductivity. Use simple circuit can convert the change of conductivity of the gas concentration corresponding to the output signal.
Applications :
 Gas leak detection for mobile phones, computers and other consumer electronics applications, also for breathing gas detection control, smoke alarm indoor & etc.
Technical parameters :
 

Gas sensor character

Symbol

standard

Minimum

Maximum 

Unit

Sensor Resistance

R0

-

100

1500

  KΩ 

Gas (C2H5OH) concentration

FS

-

1

1000

ppm

Sensitivity

S50

-

1.2

50

Reference Circuit :
 

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