QH22L28GC

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Panel indicators and Pilot Lights are used to indicate the presence or absence of electrical current, or to indicate the on or off positions of electrical switches. They provide visual and audible indications, and they usually do not require any additional wiring to operate. One such product is the QH22L28GC.

The QH22L28GC is a 22mm panel indicator, with one inward-facing fluorescent bulb in a plastic (ABS) enclosure. The product is UL recognized and marked, and is suitable for NEMA 4, 4X, 12 and 13 installations. It has an operating temperature range of -20°C (-4°F) to +60°C (+140°F) and is rated for up to 15,000 cycles.

The QH22L28GC is designed to work on line voltages between 12-24V AC/DC. It has a built-in EMI filter to protect against electromagnetic interference, as well as short circuit and overload protection. The product is also designed to prevent undue stress to the plastic housing caused by prolonged current flow, and can handle up to 250mA.

The working principle of the QH22L28GC is quite simple. When voltage is applied to the contacts, a small current flows through the circuitry and turns on the bulb. As long as the voltage is present, the bulb will remain lit. If the voltage is removed the bulb will turn off. The product is designed to handle short pulses of current in applications such as motors, pumps, and solenoid valves.

The QH22L38GC has a multitude of applications, including factory automation, emergency lighting, machine status signals, process control, and barrier gates. They can be used to indicate the on/off status of switches, as well as the presence or absence of electrical current. The product is also popular in equipment indicating the status of oil and gas production.

The QH22L38GC is a simple and reliable solution for visual and audible indications. It is robust, UL recognized, and features short circuiting and overload protection. The product is easy to install and requires no additional wiring. The built-in EMI filter ensures that the product will operate reliably in the presence of electromagnetic interference.

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