ACEIRMC 9pcs/Lot Gas Detection Sensor Module MQ-2 MQ-3 MQ-4 MQ-5 MQ-6 MQ-7 MQ-8 MQ-9 MQ-135 Sensor Module Gas Sensor Starter Kit for Arduino Raspberry Pi (9PCS/Lot) Color:9PCS/Lot There is no need to

There is no need to reset the timer every time you restart the power to the device

automatic power down

Includes one fiberglass scratch pen

The black oxide finish steel sheet metal screw with pan head and Phillips drive has a Type A point for forming threads in thin metals between 0

32 Jumper/Bridge: Press-fit/Insertion

ACEIRMC 9pcs/Lot Gas Detection Sensor Module MQ-2 MQ-3 MQ-4 MQ-5 MQ-6 MQ-7 MQ-8 MQ-9 MQ-135 Sensor Module Gas Sensor Starter Kit for Arduino Raspberry Pi (9PCS/Lot) Color:9PCS/Lot There is no need toACEIRMC 9pcs Lot Gas Detection Sensor Module MQ 2 MQ 3 MQ 4 MQ 5 MQ 6 MQ 7 MQ 8 MQ 9 MQ 135 Sensor Module Gas Sensor Starter Kit for Arduino Raspberry Pi (9PCS Lot) Choosing Eiechip Feels Fantacy !!! 1. With signal output indicator light. 2. Size: 32mm X22mm X30mm length width height; 3. The main chip: LM393, MQ x gas sensing probe; 4. Working voltage: DC 5V; 5. With signal output indicator light; 6. The dual signal output (analog output and TTL