BMP180 I2C Barometric Sensor

$6.17

MQ-2 Hydrocarbon Sensor LPG

$5.00

MQ-3 Alcohol Gas Sensor

$5.00

MQ-4 Methane Gas Sensor

$5.00

MQ-6 Propane Isobutane sensor

$5.00

MQ-7 Carbon Monoxide Gas Sensor

$5.00