38HM74

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Snap action, or also known as "precision limit switch", is a device with a variety of uses. The 38HM74 is just one of many. These switches are available in many configurations and can be used for a variety of functions ranging from general-purpose switch triggering to process automation.

The 38HM74 type snap action limit switch is a hermetically sealed, self-cleaning switch. It features a sturdy body construction that is designed to withstand harsh environmental conditions and uses a snap action plunger action to open and close contacts quickly and accurately. This ensures that the switch provides reliable control of your process.

The switch has a maximum operating temperature of 125°C and is UL approved. It is equipped with two form C (SPDT) contacts and can be operated with voltages up to 250VAC and 30VDC. It features a minimum of 1.25" travel before the contacts are opened or closed, and it can be mounted in either single or double pole configurations.

The action of the switch is determined by the type of actuator used. The 38HM74 has a variety of choices for its actuator, such as roller, leaf, plunger, and toggle. Depending on the type of actuator chosen, the switch can be used for momentary, maintained or alternating positions. The 38HM74 also has an optional illuminated button which can be used for indicating when the switch is in the active position.

The 38HM74 is designed for use in industrial applications where it could be used for triggering alarms, controlling motors, detecting levels, and performing other types of processes. It is a reliable choice for any application that requires precision and accuracy. It is also very easy to install and is constructed to offer many years of service.

In terms of working principle, the 38HM74 is a mechanical device that is responsible for sensing and reporting when a predetermined limit has been reached. The actuation of the switch can be either manual or automatic. The plunger action is responsible for triggering the contacts when the predetermined limit is reached. The contacts are then opened or closed accordingly, depending on the type of switch chosen.

In conclusion, snap action limit switches such as the 38HM74 are an essential part of industrial processes. Their robust construction and reliable operation ensure that these switches can withstand extreme environmental conditions and offer reliable long-term service in a wide range of applications. Additionally, these switches offer a variety of actuator types that can be chosen depending on the application.

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