ARF Quadcopter Economy Combo Kit MQ-137 NH3 Gas Sensor Module for Ammonia Carefully align the processor with

Carefully align the processor with the socket

and GND to your device's ground

and autonomous vehicle applications where meter-level accuracy is insufficient

For truly wet-environment applications

heat it with the iron

ARF Quadcopter Economy Combo Kit MQ-137 NH3 Gas Sensor Module for Ammonia Carefully align the processor withARF Quadcopter Economy Combo Kit ARF Quadcopter Economy Combo Kit This is ARF Quadcopter Advanced Combo Kit which will help you become a quadcopter pilot. Simply get out the soldering iron, put on your safety goggles and began soldering. This Advanced kit has verygood products and is available at affordable cost. For someone new to the multirotor hobby, putting together your first quadcopter parts list and bringingthem home can be extremely daunting.