GAS SENSOR - ETC
Description
TECHNICAL DATA
FEATURES Fast response and High sensitivity Stable and long life Simple drive circuit Wide detecting range APPLICATION They are used in air quality control equipments for buildings/offices, are suitable for detecting Of O3 .
SPECIFICATIONS A.
Standard work condition
Symbol Vc VH RL RH PH Symbol Tao Tas RH Symbol Rs Parameter name Circuit voltage Heating voltage Load resistance Heater resistance Heating consumption Parameter name Using Tem Storage Tem Related humidity Parameter name Sensing Resistance Concentration Slope rate
MQ-131 GAS SENSOR
Technical condition 5V±0.
1 6V±0.
1 Variable 31Ω±5% Less than 1100mw Technical condition -10 -50 -20 -70 Less than 95%RH Technical parameter 100KΩ-200KΩ (50ppb O3 ) ≤0.
65
Remarks AC or DC AC or DC Room Tem
B.
Environment condition
Remarks
C.
Sensitivity characteristic
Remark 2 Detecting concentration scope 10ppb-2ppm O3
α O3 (100ppb/50ppb) Standard Detecting Condition Preheat time
Temp: 20 ±2 Vc:5V±0.
1 Humidity: 65%±5% Vh: 6V±0.
1 Over 24 hour
D.
Structure and configuration, basic measuring circuit
1 2 3 4 5 6 7 8 9
Parts Gas sensing layer Electrode Electrode line Heater coil Tubular ceramic Anti-explosion network Clamp ring Resin base Tube Pin
Materials SnO2 Au Pt Ni-Cr alloy Al2O3 Stainless steel gauze (SUS316 100-mesh) Copper plating Ni Bakelite Copper plating Ni
Fig.
1
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Free Datasheet http://www.
datasheet4u.
com/
Structure and configuration of MQ-131 gas sensor is shown as Fig.
1, sensor composed by micro AL2O3 ceramic tube, Metal-oxide semiconductor sensitive layer, measuring electrode and heater are fixed into a crust made by nylon and stainless steel net.
The heater provides necessary work conditions for work of sensitive components.
The enveloped MQ-131 have 6 pin ,4 of them are used to fetch signals, and other 2 are used for providing heating current.
Electric parameter measurement circuit is shown as above Fig.
1.
E.
Sensitivity characteristic curve
Fig.
3 is shows the typical sensitivity c...
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