20 ƒ

Description

High quality dual panel design with power indicator and TTL signal output indication..
TTL output valid signal is low level, (output low signal light, which can be accessed microcontroller IO port)..
Analog output with increasing concentration, the higher the concentration, the higher the voltage..
A hazardous detection apparatus for the family, the environment. Suitable for ammonia, aromatic compounds, sulfur, benzene vapor, and other es harmful detection. -sensitive element test concentration range: 10 to 1000ppm..
Long service life, stable and reliable. Has fast response and recovery features..

The -sensitive material used in the MQ135 sensor is tin dioxide (SnO2) with low conductivity in clean air. When there is a polluting in the environment, the conductivity in the sensor increases with the concentration of polluted in the air. The change in conductivity can be converted to an output signal corresponding to the concentration using a simple circuit. Specifications: Size:32* 20* 22mm (L*W*H) 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 ) , the maximum concentration of a voltage of about 4V 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. The installation of electronic modules requires basic knowledge and requires a certain electronic professional foundation and hands-on ability. Please purchase carefully! Manual measurement, with small error. Please check size in detail before purchase. Real colors may slightly differ from the pictures, as it depends on specific monitor settings and light brightness. We highly appreciate all customers opinions to improve the selling, also if anything you unsatisfied, please contact us for probable best solution. Package Includes: 3Pcs

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3Pcs MQ135 MQ-135 Air Quality Sensor Hazardous Detection Module for Arduino

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