91MCE18-P2

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91MCE18-P2 Snap Action, Limit Switches: Application and Operation Principles

The 91MCE18-P2 snap action limit switch is a mechanical device that is used to detect the position and movement of a mechanical object and change its state when specified contact points are reached, usually for the purpose of reducing power consumption, increasing safety, and controlling the operation of a process. The 91MCE18-P2 is designed for use in a variety of applications, from environments with extreme temperature ranges, corrosive atmospheres, and shock/vibration sensitivity to remotely actuated systems and areas with tight spaces, such as high demand circuit control, process control, commercial applications, and air conditioning.

Mechanism Design

The 91MCE18-P2 snap action switch is based on a spring-loaded, mechanical design which consists of two actuating pieces; the switch body and a plunger/sensing arm. When the plunger/sensing arm is pushed inwards (actuator), it creates a downward force on the spring. The spring pushes back against the plunger, which in turn pushes the switch body against the contacts, forming an electrical connection between them. The 91MCE18-P2 is designed to operate at low contact forces, so minimal physical effort is required to trigger the switch. The switch body and plunger/sensing arm have multiple contact points, allowing the device to be used to detect different positions of the object to which it is attached, or in combination with other sensors to form a larger sensor system.

Operation Principle

When the plunger/sensing arm is pushed inwards, the switch is triggered, causing the contacts to be closed. When the plunger/sensing arm is released, the contacts open again. The force required to activate the switch can be adjusted with a tensioning screw, allowing for different sensitivity settings for various scenarios. The 91MCE18-P2 also has an external manual override, so it can be tested and adjusted off-site. This makes it an ideal choice for use in remote locations.

Applications

The 91MCE18-P2 snap action limit switch is ideal for a wide variety of applications, including controlling motors, pumps, fan systems, lighting, and any other processes that require a switch mechanism. It can also be used to monitor the position of mechanical objects or to detect movement or changes in pressure or temperature. It is also suitable for use in harsh industrial environments, such as oil refineries, chemical plants, and manufacturing facilities.

The 91MCE18-P2 is suitable for applications requiring a cost effective, reliable, and low maintenance solution. It is also simple to install, allowing it to be retrofitted into existing systems. The device is also sealed, making it resistant to vibration, dust, water, and other hazards.

Conclusion

The 91MCE18-P2 is a reliable and cost-effective snap action limit switch designed for a range of applications. It uses a reliable and repeatable mechanical design, allowing it to be triggered by low force movements, while also having an external manual override. It is also sealed, making it resistant to dust and water, making it suitable for use in harsh industrial environments. The switch is easy to install and low maintenance, making it a popular choice for a variety of applications.

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