Electronic air cleaners remove particles by electrostatic forces similar to electrostatic precipitators used in industrial gas cleaning. There are three basic designs: the ionizing plate type, the charged-media non-ionizing type, and the charged-media ionizing type. Operation of electronic air cleaners is based on the principle that particles moving in air stream can be charged and then subsequently collected on plates of opposite charge. An electronic air cleaner draws particle-laden air past a serious of ionizing wires that produce positive ions; this air then passes through channels between a serious of negatively charged collection plates, which attract the positively charged particles. These air cleaners are more efficient than a conventional mechanical filter. They are able to capture small particulate, including pollen and cigarette smoke particles.

Electronic balances come in capacities from a few milligrams to kilograms. A single control bar turns the balance on to provide a digital readout of the mass. Electronic balances can be coupled directly to computers or recording devices. The precision is greatly increased with a digital display, replacing visual interpretation of a scale. Electronic balances are generally more precise and gives digital reading. Due to their sensitivity and cost, extreme care is needed to maintain the instrument.

Electrical ballast is a device used to control the amount of current flowing in an electric circuit. It differs in terms of its complexity. This function as a power transformer for fluorescent lamps, light sources that consist of a glass tube filled with argon, neon, and other inert gas. When ballast supplies electrical current, the resulting arc emits ultraviolet radiation that excites the phosphors inside the lamp wall, causing them to radiate visible light.