Electronic display device that have the longest life of any Readout; shock and vibration meet military requirements.
Made in U.S.A.
Typically applications need for 6 at once.
Well shaped characters, bright even color.
National Readout Tubes are neon filled cold cathode discharge tubes. Each tube consists of a common anode and 10 independent cathodes, each formed into the shape of a numeral. Application of a negative voltage to a selected cathode causes the gas around the cathode to ionize and glow. The visual effect is a bright orange neon glow closely following the shape of the energized cathode.