MQ-2 MQ-3 MQ-4 MQ-5 MQ-6 MQ-7 MQ-8 MQ-9 MQ-135 Detection Smoke methane liquefied Gas Sensor Module
Features:
- Using high-quality dual-panel design,with power indicator and TTL signal output instructions.
- The switching signal having a DO (TTL) output and analog output AO.
- TTL output valid signal is low. ( Low-level signal when the output light can be directly connected to the microcontroller or relay module )
- Analog output voltage with the higher concentration of higher voltage
- There are four screw holes for easy positioning.
- Has a long life and reliable stability
- Rapid response and recovery characteristic
Input voltage : DC5V Power consumption ( current ): 150mA
DO output : TTL digital 0 and 1 ( 0.1 and 5V)
AO output :0.1-0 .3 V ( relative to pollution ) , the maximum concentration of a voltage of about 4V
Special note: After the sensor is powered,needs to warm up around 20S,measured data was stable,heat sensor is a normal phenomenon,because the internal heating wire,if hot is not normal .
Application:
Suitable for home or industrial hydrogen leak monitoring devices. Can not interfere with ethanol vapor, soot, carbon monoxide and other gases.
Wiring:
VCC: positive power supply (5V)
GND: power supply is negative
DO: TTL switching signal output
AO: analog signal output
NOTE:
After the sensor is powered, need to warm about 20S, measured data becomes stable, heat sensor is normal
| Product number |
MQ gas sensor |
| Product type |
Semiconductor gas sensor |
| Standard package |
Black wood |
| Detaction gas |
Alcohol steam |
| Detection contration |
0.4-4mg/L alcohol |
| Standard ciruit conditions |
Circuit voltage |
VC |
≤24V DC |
| Heating voltage |
VH |
5.0V±0.2V ACorDC |
| Load Resistance |
RL |
Adjustable |
| Characteristics of Gas sensors under standard test conditions |
Heating resistance |
RH |
31Ω±3Ω
Room temperature
|
| Heating power consumption |
PH |
≤900mW |
| Sensitive body surface resistance |
RS |
2KΩ-20kΩ(in0.4mg/L alchol) |
| Sensitivity |
S |
Rs(in air)/Rs(0.4mg/L alcohol)≥5 |
| Concentration slope |
α |
≤0.6(R300 ppm/R100 ppm alcohol) |
| Standard test conditions |
Temperature/humidity |
20℃±2℃;65%±5%RH |
| Standard test circuit |
VC:5.0V±0.1V |
| VH:5.0V±0.1V |
| Warm up time |
Not less than 48 hours |
Product Tags:
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MQ-135 4mg/L Alcohol Methane Liquefied Gas Sensor Module 150mA Images
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