Chuangzhuo OMS Octopus Mercury Sensor - White
You can use them build electronics projects just as easy as piling bricks. By using Octopus electronic bricks you may connect Arduino/Freaduino compatible boards easily with various digital analog and I2C/Uart interfaces. These the breadboard-less firm connection are prepared to extensive modules like poteniometers sensors relays servoseven buttons just plug and play. Octopus Mercury Sensor is a sensor module based on mercury switch principle used for object level measurement and angle measurement.