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Original MQ-4 Methane Gas Sensor Natural Coal Co Methane Detector Module Kit for Arduino

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Sale Price:  US $ 1.92 / piece
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Features: 
Indication of the signal output. 
Dual signal output (analog output, and TTL level output) TTL output signal is low. (When low output signal light, and can be connected directly to the microcontroller) 
0 ~ 5V analog output voltage, the higher the concentration, the higher the voltage
Of methane gas, the natural gas has better sensitivity.
Suitable for home or factory methane gas, natural gas, and other monitoring devices.

Specification:
Size: approx. 32 X 22 X 27 mm/1.26 X 0.87 X 1.06"
Chip: LM393, ZYMQ-4 gas sensor 
Operating Voltage: DC 5V

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Post Air Mail Free Shipping 15 - 45 days
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N.B.: If the seller provides the "Longer Protection" service on this product, you may ask for refund up to 15 days after order completion.
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Price:  US $6 / piece
Sale Price:  US $ 1.92 / piece
from AliExpress
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