Telephones and cellular phones convert voice or other sound signals into a form that can be transmitted to another device that receives and reconverts the waves back into sound.

Flow Switches

(366 companies)
Flow switches are devices that monitor flow and send a trip signal to other devices, like a pump, for protection. These switches can be used for the measurement of gases, liquids, and steam.
...controllers, sound level meters and dosimeters, vibration and noise analyzers, and speed and velocity instruments. Electrical and electronic test equipment: automated test equipment (ATE), data acquisition and signal conditioning devices, data recorders...

Video Cameras

(1,629 companies)
...film prevalent in the 20th Century. Modern devices capture images digitally, via the means of an image sensor. Image sensors turn visible light into electronic signals with information to determine the signal's organization when the picture...
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...analyzers, and speed and velocity instruments. Electrical and electronic test equipment: automated test equipment (ATE), data acquisition and signal conditioning devices, data recorders and chart recorders, multimeters and electrical meters, RF and microwave...

KVA Meters

(52 companies)
...in kilovolt-amperes (KVA). Apparent power is the combination of a circuit 's true power and reactive power. True power is the actual power dissipated in a circuit. Reactive power or imaginary power indicates how a reactive load drops voltage and draws current...

Digital Video Recorders

(543 companies)
Digital video recorders record and store video camera output in digital form on disk.

Current Sensors

(262 companies)
Current sensors measure AC and/or DC current levels. They receive current inputs and provide outputs as analog voltage signals, analog current levels, switches, or audible signals.
Current-to-voltage converters scale and convert current signal input to the desired output voltage range.

Current Loop Converters

(98 companies)
Current loop converters convert an analog or digital signal to a current loop output such as 4-20 mA or 0-20 mA.