Sliding gate operator limit sensor - Magnetic mechanism
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Sliding gate operator limit sensor – Magnetic mechanism

$58.40

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Sliding gate operator limit sensor – Magnetic mechanism

A sliding gate operator limit sensor, often a limit switch, is a crucial component that signals the gate operator when the gate has reached its fully open or fully closed position, stopping the motor and preventing over-travel. These sensors ensure the gate stops at the correct positions, preventing damage to the gate and surrounding structure. 

Here’s a more detailed explanation:
  • Function:

    Limit sensors, like limit switches, detect when the gate reaches its extreme open or closed positions. 

  • How it works:

    When the gate reaches the limit, the sensor sends a signal to the gate operator’s control board, which then stops the motor. 

  • Importance:

    Without limit sensors, the gate might continue to move, potentially hitting the end posts or other obstructions, causing damage. 

  • Types:

    Common types include magnetic limit switches and photoelectric sensors (photo eyes). 

  • Magnetic Limit Switches:

    These utilize magnets placed on the gate and a magnetic sensor on the operator. When the magnet aligns with the sensor, it triggers the limit switch. 

  • Photoelectric Sensors (Photo Eyes):

    These use infrared beams to detect obstructions. When the beam is broken (e.g., by the gate), the sensor signals the operator to stop. 

  • Installation:

    Proper installation and adjustment of limit sensors are crucial for the reliable operation. 

  • Maintenance:
    Regular inspection and maintenance of limit sensors are recommended, as they can wear out or become misaligned over time. 
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Description

Sliding gate operator limit sensor – Magnetic mechanism

A sliding gate operator limit sensor with a magnetic system is one type of limit sensor that uses magnets mounted on the gate and a corresponding magnetic sensor to detect the gate’s position and stop its movement at the desired open and closed limits.

When the magnet nears the sensor, it triggers a signal that cuts power to the motor, preventing the driveway gate opener from over-traveling. This mechanism ensures the gate stops precisely at the pre-set positions, enhancing both functionality and safety.

Usually, the Sliding gate operator limit sensor – Magnetic mechanism is used on the sliding gate opener and some types of swing gate operators.

More information about the sliding gates:

Sliding gate automation is usually included on the gate.

The single sliding gate is wider than the width of your driveway. It slides to one side of the drive opening on wheels that run along a track.

A single electric gate opener is mounted to one side of the drive entrance. The sliding gate motor is positioned so that a cog on the motor’s output shaft meshes with a toothed rack mounted along the inside of the gate. Therefore, as the electric sliding gate motor turns, the cog rotates in the rack and draws the gate along.

A sliding gate opens along a length of straight gate track more than twice the width of the driveway. This starts at the pillar or gate post on one side of the opening and crosses the drive past the opposite pillar. The sliding gate track is long enough for the gate to slide along to completely clear the drive entrance.

Additional information
Weight 0.1 kg
Dimensions 10 × 10 × 6 cm
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A micro limit switch, often simply called a micro switch, is a type of electrical switch that's characterized by its small size and the precise, rapid action it takes when a minimal amount of force is applied to its actuator. It's designed to detect the presence or position of an object or the end of a mechanical movement. These switches are known for their:
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  • Rapid response: The internal contacts "snap" open or closed very quickly, regardless of how slowly the actuator is pressed. This snap-action mechanism helps to reduce arcing and extends the switch's lifespan.
  • Reliability: They are built to withstand millions of operations, making them durable for long-term use.
  • Compact size: Their small footprint allows them to be used in applications where space is limited.
How it Works A micro switch typically consists of:
  • Actuator: This is the external part that an object or mechanical component presses against. It can be a button, a lever (with or without a roller), a plunger, or other forms.
  • Internal spring mechanism: This provides the "snap-action." When the actuator is pressed to a certain point (the "trip point"), the spring mechanism rapidly moves the contacts.
  • Contacts: These are the electrical components that open or close the circuit. Micro switches usually have three terminals:
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    • Normally Open (NO): This contact is open (no current flows) when the switch is unactivated and closes when the switch is actuated.
    • Normally Closed (NC): This contact is closed (current flows) when the switch is unactivated and opens when the switch is actuated
When the actuator is pressed, it reaches a specific "operating point" where the contacts change their state (either from NO to closed, or NC to open). When the pressure is removed, the actuator returns to its original position, and the contacts revert to their normal state.   Applications Micro limit switches are incredibly versatile and found in a vast array of devices and systems due to their precision and reliability. Some common applications include:
  • Household Appliances:
    • Microwave ovens: To detect if the door is closed before operating.
    • Washing machines: For door interlocks and water level detection.
    • Refrigerators: To turn the light on/off when the door opens/closes.
    • Printers: To detect paper jams or the position of paper.
  • Automotive Industry:
    • Car doors: To detect if a door is open or closed (e.g., for interior lights or security systems).
    • Brake pedals: To activate brake lights.
    • Seat belt mechanisms: To detect if a seat belt is fastened.
  • Industrial Automation:
    • Conveyor systems: To detect the presence of items or the end of travel for a belt.
    • Robotic arms: For precise positioning and limit detection of movement.
    • Machine safety guards: To ensure guards are correctly positioned before machinery operates.
    • Elevators and hoists: To prevent over-travel and ensure proper door operation.
  • Consumer Electronics:
    • Computer mice and keyboards: For button clicks.
    • Vending machines: For coin detection or jam detection.
  • Medical Equipment:
    • In various diagnostic tools and surgical instruments for precise control.
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  • Hinge Lever: A simple lever arm that pivots to actuate the switch.
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A mercury level switch is a type of electrical switch that uses a small amount of liquid mercury to open or close an electrical circuit based on its position or the level of a liquid. Essentially, the mercury acts as a conductive bridge between electrical contacts. How it Works The core component of a mercury level switch is a sealed glass or metal capsule containing one or more electrical contacts and a small, free-moving drop of mercury. When the switch or the liquid it's monitoring changes its tilt or level:
  • Tilt Switches: Gravity pulls the mercury to the lowest point within the capsule. If the tilt is sufficient, the mercury will flow to connect two or more contacts, completing an electrical circuit. Tilting it in the opposite direction moves the mercury away, breaking the circuit.
  • Float Switches: In liquid level applications, the mercury switch is often integrated with a float mechanism. As the liquid level rises or falls, the float moves, which in turn tilts the mercury switch, causing the mercury to connect or disconnect the contacts.
  • Displacement Switches: Some designs use a "plunger" that dips into a pool of mercury, raising the mercury level to contact an electrode and complete the circuit.
Applications Historically, mercury level switches were used in a wide range of applications due to their reliability and the non-eroding nature of mercury contacts. These included:
  • Thermostats: In older thermostats, they controlled heating and cooling systems.
  • Sump Pumps: Used to automatically turn on the pump when water levels rise.
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  • Industrial Settings: Utilized in liquid level control and safety systems.
  • Roll Sensing/Tip-over Warnings: For construction equipment or other vehicles operating on uneven terrain.
Advantages and Disadvantages Advantages:
  • Durability and Reliability: The sealed contacts prevent oxidation, leading to a long lifespan.
  • Quiet Operation: No abrupt snapping of contacts.
  • No Contact Erosion: Mercury's liquid nature prevents the wear and tear seen in mechanical contacts.
  • Spark-Free: They don't produce sparks when making or breaking circuits, making them suitable for hazardous environments.
Disadvantages:
  • Toxicity of Mercury: This is the primary and most significant disadvantage. Mercury is a highly toxic substance, posing serious environmental and health risks if released.
  • Environmental Concerns: Improper disposal of mercury switches can lead to widespread contamination. Due to these concerns, the use of mercury switches has been largely phased out in many applications, especially in new products.
  • Sensitivity to Gravity/Orientation: While an advantage for tilt sensing, it makes them unsuitable for portable or mobile devices where orientation changes or vibrations could cause false readings.
  • Limited Functionality: Most mercury switches provide only a simple on/off function.
Due to the toxicity of mercury, many applications that once relied on mercury switches have transitioned to safer, alternative technologies such as solid-state sensors, optical sensors, or mechanical float switches.
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A magnetic contact switch, often simply called a magnetic contact or door/window sensor, is a simple yet highly effective security device that detects when a door, window, gate, or any movable barrier is opened or closed. How it Works: It consists of two main parts:
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  2. The Magnet Unit: This part contains a small, permanent magnet. This unit is mounted on the moving part of the opening (e.g., the door itself, the window sash, or the gate panel).
The Operational Principle:
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    • Many common contacts are "Normally Open" (NO), meaning the circuit is open when the magnet is away and closes when the magnet is near.
    • Some are "Normally Closed" (NC), meaning the circuit is closed when the magnet is near and opens when the magnet is away. This is very common in security systems, as an "open" circuit triggers an alarm.
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Common Applications:
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    • Garage Doors/Overhead Doors: Larger, more robust magnetic contacts are used for garage doors.
    • Gates: Used on pedestrian gates or even main driveway gates (sometimes in conjunction with the gate opener's own limit switches) to monitor their open/closed status for security purposes.
    • Safes and Vaults: To detect if they have been opened.
    • Vehicle Doors/Trunks/Hoods: While vehicles have internal sensors, magnetic contacts can be added for enhanced security on specific compartments or custom modifications.
  • Access Control Systems: To monitor entry and exit points, log access events, or control other devices based on door status.
  • Automation Systems: To trigger actions based on the status of a movable part. Examples include:
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    • Indicating when a cabinet door is ajar.
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  • Recessed/Flush Mount: Designed to be drilled into the frame and door for a more discreet, hidden installation.
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  • Wired vs. Wireless:
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    • Wireless: Contain a small battery and a radio transmitter to send signals wirelessly to the alarm panel, offering easier installation.
In Vancouver, BC, magnetic contact switches are a common product found at security system suppliers, electrical wholesalers, and businesses that install residential and commercial security systems, including companies like Royal Gates if they offer security integrations for their gate systems.
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  • Underground: The motor and mechanism are installed underground, providing a more discreet appearance. 
  • Dual Swing: These openers are designed for gates that swing open from the center. 
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  • Security: Prevents unauthorized access to the property.
  • Enhanced Property Value: Adds a layer of sophistication and security to the property.
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An exit button, also known as a push-to-exit button, is a device used in access control systems to allow individuals to exit a secured area without needing to use their access credentials.
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