MQ-2 Sensor เซ็นเซอร์ตรวจจับควัน แก๊สมีเทน LPG Carbon Monoxide
MQ-2 Sensor เซ็นเซอร์ตรวจจับควัน แก๊สมีเทน LPG Carbon Monoxide
การประยุกต์ใช้งาน
- ตรวจจับการรั่วไหลของแก๊สมีเทน LPG และส่งสัญญาณแจ้งเตือน
- ตรวจจับควันที่เกิดจากการเผาไหม้ (Co : Carbon Monoxide) และส่งสัญญาณแจ้งเตือน
Description
MQ-2 MQ2 Smoke Gas LPG Butane Hydrogen Gas Sensor Detector Module
For Arduino TTL Output DC 5V 150mA High Sensitive
Wiring:
VCC: positive power supply (5V)
GND: power supply is negative
DO: TTL switching signal output
AO: analog signal output
MQ-2 sensor Introduction:
The gas-sensing material used in the MQ-2 gas sensor is tin oxide (SnO2) with a low conductivity in clean air.
When there is a combustible gas in the environment in which the sensor is present the conductivity of the sensor increases as the concentration of combustible gas in the air increases. The change in conductivity can be converted to an output signal corresponding to the gas concentration using a simple circuit. The MQ-2 gas sensor is highly sensitive to liquefied gas propane and hydrogen and is ideal for the detection of natural gas and other combustible vapors.
This sensor can detect a variety of combustible gases is a variety of applications for low-cost sensors.
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 .
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