EVL-HFKA05A53

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Thumbwheel potentiometers are rugged and reliable multi-turn variable resistors with applications in fields such as commercial and military avionics, instrumentation, and robotic control systems. The EVL-HFKA05A53 is a thumbwheel potentiometer made by Omron Corporation. The device features a four-speed turn action and a maximum resistance of 50 kω.

This thumbwheel potentiometer is a multi-turn adjustment element encased in a robust, weather-resistant package with sealed terminals. Models are available with four different shaft styles including a special screwdriver slot for precise adjustment, as well as various 5- to 25-turn resistance values ranging from 1000 Ω to 30 kΩ. In addition, the EVL-HFKA05A53 has the ability to reduce the torque level, making it ideal for applications in high-dampening environments.

The device features a sealed construction with a durable polypropylene thumbwheel, making it suitable for operation in harsh environments. The EVL-HFKA05A53 is designed with an adjustable count rate of up to five turns per second. This allows users to make rapid adjustments and fine tune the resistance accurately. The adjustable count rate also helps reduce wear and tear on the potentiometer shaft, thereby extending its lifespan.

The EVL-HFKA05A53 also features a high level of accuracy. The adjustment is controlled by a steady-state contact-slip arrangement that avoids any unnecessary contact bounce effects and ensures accurate and precise adjustment. Furthermore, to ensure that there is no unintended adjustment, the device is equipped with a lockable clamp mechanism. This allows users to secure the potentiometer at a desired setting.

The working principle of the EVL-HFKA05A53 is relatively simple. When the user applies a resistance setting, the thumb wheel is turned, generating a voltage that is proportional to the resistance value. This voltage is then passed to the potentiometer and converted into resistance by the nonlinear elements of the potentiometer. The result is a controlled setting for the potentiometer that can be used in a wide range of applications.

Overall, the EVL-HFKA05A53 is an accurate and reliable thumbwheel potentiometer. It features sealed construction for use in harsh environments, an adjustable count rate of up to five turns per second, high accuracy, and a lockable clamp mechanism. These features make it ideal for a variety of applications, such as commercial and military avionics, instrumentation, and robotic control systems.

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