21HE26-6

Snap Action, Limit Switches

21HE26-6 is one of the widely used snap action limit switches. It has a number of applications and works based on a simple mechanism. This article gives a brief overview of its application fields and working principle.

Applications

21HE26-6 snap action limit switch finds a variety of applications in different fields. It is used in most home appliances, such as washing machines, dishwashers, etc. It is also found in large machinery, such as printing machines and automated production systems. Additionally, they are used in the automotive industry and are commonly found in control systems, relays, solenoids, pumps, and motor starters.

The snap action limit switch can also be implemented in safety systems, such as intrusion detection systems, smoke detectors, fire alarm systems, and pressure switches. In short, this switch is used whenever the need arises to control the operation of any machine or system.

Working Principle

The 21HE26-6 limit switch works based on the principle of over-travel. When the plunger pushes on the actuator, it creates an overtravel, which is a mechanical resetting of the switch. The plunger pushes the actuator, which then moves against the switch’s operating force, which creates an over-travel.

The over-travel, in turn, causes the contact points of the switch to close, which completes the circuit and thus allows for current to travel through the switch. This process allows for the very accurate control of the machine or system being used. The resetting of the switch is then achieved when the actuator is released, allowing the contact points to open.

The 21HE26-6 limit switch is a reliable and inexpensive way to add a considerable degree of functionality to a machine or system. It has a wide range of applications and is highly reliable, making it one of the most widely used snap action limit switches.