12" eTape Liquid Level Sensor + extras _ARD_SHIELD_SERIAL and the SPI 2x3 port

and the SPI 2x3 port

USB or 6V solar panel

Made using two DFRobot servo brackets

Pickup a copy of Make: Bluetooth LE Projects for Arduino

FSRs are basically a resistor that changes its resistive value (in ohms Ω) depending on how much its pressed

12" eTape Liquid Level Sensor + extras _ARD_SHIELD_SERIAL and the SPI 2x3 portThe eTape Liquid Level Sensor is a solid state sensor with a resistive output that varies with the level of the fluid. It does away with clunky mechanical floats, and easily interfaces with electronic control systems. The eTape sensor's envelope is compressed by the hydrostatic pressure of the fluid in which it is immersed. This results in a change in resistance that corresponds to the distance from the top of the sensor to the surface of the fluid.