Arduino: Gas Sensors MQ Series Principle
Posted: Wed 03 Aug 2016 4:21 pm
The virgin sensor require to run for 24 hours (the 1st time initialization).
The heater require 5V 800mW (160mA) which is a bit hot while working.
Updated: The MQ-2 sensor resistance (RS) will vary between 3 - 30 kohm while measuring gas. I don't known what it mean. Normally when measuring the clean air, the MQ-2 sensor resistance (RS) just only 10 kohm and reduce when found the gases. Look at the graph (post #5), if RO is fixed, the RS should be lowest to 0.3 kohm. The prefered range should be 0.3 to 10 kohm.
The MQ-2 sensor resistance will working as the Voltage Dividers.
The heater require 5V 800mW (160mA) which is a bit hot while working.
Updated: The MQ-2 sensor resistance (RS) will vary between 3 - 30 kohm while measuring gas. I don't known what it mean. Normally when measuring the clean air, the MQ-2 sensor resistance (RS) just only 10 kohm and reduce when found the gases. Look at the graph (post #5), if RO is fixed, the RS should be lowest to 0.3 kohm. The prefered range should be 0.3 to 10 kohm.
The MQ-2 sensor resistance will working as the Voltage Dividers.