RF amplifiers are devices that accept a varying input signal and produce an output signal that varies in the same way, but with larger amplitude.

Antennas are structures or devices used to collect or radiate electromagnetic waves.

Welding machines and joining machines include all manner of devices used for welding, brazing and soldering.

S meters (strength meters, signal-strength meters) measure the strength of signals in communication systems such as receivers and transmitters.

Gas transmitters consist of an enclosure, sensor, and electronics that convert a signal from a gas sensor into an analog output signal (typically 4-20 mA).

Linear motors generate force only in the direction of travel.

Electric linear actuators have an output rod that provides linear motion via a motor driven ball screw, lead screw, or ACME screw assembly.