MQ135 MQ 135 MQ-135 Smoke Liquefied Flammable Methane Gas Sensor Module for Arduino Diy Starter Kit

MQ135 MQ 135 MQ-135 Smoke Liquefied Flammable Methane Gas Sensor Module for Arduino Diy Starter Kit

Sensitive material MQ135 gas sensor is used in clean air low conductivity tin oxide (SnO2). When the sensor is kept in their environment

   In the polluting gases , the conductivity sensor with increasing air pollution in gas concentration increases. Using a simple circuit can change the conductivity

   Conversion of an output signal corresponding to the gas concentration .

   MQ135 sensor for ammonia, sulfide , benzene vapor high sensitivity of the smoke and other harmful monitor is also very good. This sensor can be seized.

• 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.
• 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 characteristics
• 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