ACEIRMC 5pcs MQ-2 Gas and Smoke Analog Sensor Breakout Board for Arduino Raspberry Pi ESP8266 MQ2 5V DC (MQ-2)

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ACEIRMC 5pcs MQ-2 Gas and Smoke Analog Sensor Breakout Board for Arduino Raspberry Pi ESP8266 MQ2 5V DC (MQ-2)

Regular Price: US$29.99

Special Price US$24.99

Availability: In stock

Supplier: ACEIRMC

Category: Business & Industry & Science Test & Measure & Inspect Temperature & Humidity Temperature Probes & Sensors

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Detection

sing 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.

A gas, natural gas, city gas , smoke better sensitivity.

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 .

VCC: positive power supply (5V)

GND: power supply is negative

DO: TTL switching signal output

AO: analog signal output

Analog output sensor for measuring changes in H2, LPG, CH4, CO, Alcohol, Smoke or Propane. This sensor can detect a variety of flammable gas, is a low-cost sensors for a variety of applications. MQ-2 gas sensor high on gas, propane, hydrogen sensitivity of detection of natural gas and other flammable vapors are also very good. Using a simple circuit to convert the change in conductivity of the gas concentration corresponding to the output signal. MQ-2 gas sensor sensitive material used in the clean air low conductivity tin oxide (SnO2). When there is the environment in which the combustible gas sensor, conductivity sensor with increg concentration of combustible gases in air increases.