MQ4 - Methane (CNG) Natural Gas Sensor Module PTC Fuse These are Metal Film Resistor

These are Metal Film Resistor with a value of 27k ohm 1W and tolerance of ±5%

This switch is turned on until the switch is pressed and turned off when released

High sensitivity to carbon monoxide

gain accuracy and stability over time and temperature

PLA filament

MQ4 - Methane (CNG) Natural Gas Sensor Module PTC Fuse These are Metal Film ResistorThis MQ4 Methane Gas sensor module can sense the presence of compressed Natural Gas sensors (CNG), methane(CH4) etc. in the air. This is a very easy to use low cost semiconductor Gas sensor Module with analog and digital output. It requires no external components just plug in Vcc & ground pins and you are ready to go. It is small sensitive to alcohol and smoke. Specification Module MQ 4 Output Type Both Analog and Digital IC Chip LM393 Operating