Octopus Electronic Bricks! You can use them build electronics projects just as easy as piling bricks! By using Octopus electronic bricks, you may connect Arduino or compatible boards easily with various digital, analog and I2C/Uart interfaces. These breadboard-less firm connections includes an extensive collection of modules like potentiometers, sensors, relays, servos, and even buttons. Just plug and play!
The Octopus Dust Sensor Detector Module with Sharp GP2Y1010AU0F uses a Sharp-brand optical dust sensor(GP2Y1010AU0F). It can be used to detect the density of dust particles with diameter beyond 0.8μm, such as cigarette smoke.