The EDM 350 Aircraft engine data manager by J.P. Instruments measures precisely 3.25 square inches i.e. smaller than a standard sized stapler and yet, it this little gadget is packed with electronic chips that analyse over 2 dozen different engine parameters of any 4-cylinder aircraft. The basic 4-cylinder kit starts at just $798 while the 6-cylinder kit is priced at $988. Both representing true value for money.

Electrical Airplane Fuel Gauge is also known as capacitance meter and uses a capacitor, an electrical amplifier and a fuel gauge to give a reading of Aircraft Fuel Flow Indicator in the tanks. The capacitor stores an electric charge, the size of the dielectric which is either the fuel in the tank when full or the air in the tank when it’s empty. The fuel gauge in the cockpit of the aircraft reads the capacitance charge and displays the information.