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Panel Indicators, Pilot Lights

Panel indicators, often referred to as pilot lights, provide a visible indication of the condition of a device, typically a switch, relay or circuit breaker. They are typically used to indicate when a device is powered on, off, or in a certain state. The purpose of a panel indicator is to alert operators to the status of a process, which makes them especially useful in industrial environments.

Panel indicators come in both illuminated and non-illuminated varieties. Illuminated indicators are the most common type, as they provide a bright and easily identifiable signal in a variety of environments. Some models use an LED to ensure long life and high energy efficiency, while others use incandescent bulbs for more brightness. Types of illuminated indicators include neon bulbs, light-emitting diodes (LEDs), tactile switches, and touch sensitive buttons.

Non-illuminated indicators do not emit any light and are usually used in more hazardous environments. They may be used to indicate a simple switch is closed or open, or they can be used to indicate the presence or absence of a voltage. Non-illuminated indicator styles include metal contact switches, reed switches, and encapsulated contact switches.

Panel indicator operation and installation is typically quite straightforward. Illuminated indicators are typically installed in series with a power source, and when a device is turned on, the power source triggers the illumination. For non-illuminated indicators, a simple switch is usually used to signal the presence or absence of a voltage. These indicators may also be wired in series or parallel with other devices.

The working principle of panel indicators and pilot lights is relatively simple. When a device is powered on, the indicator is lit or a switch is closed, depending on the type of indicator. In the case of an illuminated indicator, the power source can typically be switched on or off using a simple switch or button. For non-illuminated indicators, the voltage presence or absence is sensed and the state of the indicator is changed accordingly.

Panel indicators and pilot lights are invaluable tools in any industrial or commercial environment. They provide clear and easily identifiable indications of the status of a device or system, which helps to ensure safety and efficiency, and reduces the possibility of operator error. The relative simplicity of operation and installation, combined with their low cost and versatility, make panel indicators and pilot lights an ideal choice for any application.