MQ-8 hydrogen gas sensor semiconductors.
Feature
Sensitive material MQ-8 gas sensor is used in clean air low conductivity tin oxide (SnO2).When the sensor is exposed in the presence of hydrogen, conductivity sensor with increasing concentration of combustible gases in air increases. Using a simple circuit to convert the change in conductivity of the gas concentration corresponding to the output signal.
MQ-8 hydrogen gas sensor of high sensitivity, the monitoring of the other hydrogen-containing gas is also very satisfactory. This sensor can detect a wide range of hydrogen gas, city gas in particular, is a low-cost sensor for a variety of applications.
- In a wide range of concentrations with good sensitivity to hydrogen
- Long-life, low cost
- Simple drive circuit can be
Technical indicators
Model
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MQ-8
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Product Type
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Semiconductor gas sensor
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Standard package
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Bakelite (black bakelite)
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Detection of gas
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Hydrogen
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Detectable concentration
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100-1000ppm (hydrogen)
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Standard circuit conditions
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Circuit voltage
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V c
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≤ 24V DC
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Heating voltage
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V H
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5.0V ± 0.2V ACorDC
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Load Resistance
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R L
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Adjustable
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Under standard test conditions sensing Characteristics
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Heating resistor
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R H
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31Ω ± 3Ω (room temperature)
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Heating consumption
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P H
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≤ 900mW
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Sensing Resistance
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R s
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2KΩ-20KΩ (in 1000ppm H 2)
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Sensitivity
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S
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Rs (in air) / Rs (1000ppm hydrogen) ≥ 5
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Concentration gradient
| α |
≤ 0.6 (R 5000ppm / R3000ppm CH 4)
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Standard Test Conditions
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Temperature, humidity
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20 ℃ ± 2 ℃; 65% ± 5% RH
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Standard Test Circuit
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Vc: 5.0V ± 0.1V;
V H: 5.0V ± 0.1V
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Warm-up time
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Less than 48 hours
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