Crouzet 84872501 HSV Frequency Monitoring Relay

LED - Light Emitting Diode - a small light source

Frequency - A term used to describe how often something is done

Frequency - A wave frequency is the number of times a wave repeats within a given time

LED - Light Emitting Diode. A bulb that is very efficient at producing light. Often small.

Voltage - A measurement of volts.

Memory - A way to describe the way in which the brain can remember things.

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