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Showing Results For: Limit Switches

Limit Switches

Limit switches, also known as position switches, are electromechanical switching devices designed to detect an object's physical presence or absence within a predefined limit or position. They got their name by defining the object's travel limit by breaking or making the electrical connection. A limit switch monitors the movement and position in proximity and limits the machinery or components' mechanical motion in various industrial and automation applications. The fundamental purpose of limit switches is to provide signals to control systems once the object reaches a specific limit or position, ensuring safe movements.

Actuation Mechanisms of Limit Switches:

Lever switches can be actuated using various mechanisms based on their integrated components, such as:

  • Lever Actuation – The incorporated lever activates the switch when it comes into contact with the object's movement or when the object pushes the lever.
  • Plunger Actuation – The switch is activated when the object depresses the plunger, making contact.
  • Roller Actuation – The switch integrates a roller to sense the movement or position of the object, thus activating the switch.
  • Spring Actuation – The switch either makes or breaks the connection when the object compresses or stretches the switch's attached spring.

Normally Open and Normally Closed Configurations of Limit Switches:

Mechanical limit switches typically have a normally open (NO) or normally closed (NC) configuration. In the default state, NO switches have their contacts open, which close when the object actuates the switch. Conversely, NC switches have their contacts closed in the default state and open when actuated.

Popular Types of Limit Switches with Typical Applications:

Limit switches are available in wide varieties, each suited for specific purposes. Some of the popular limit switch types and their typical applications include:

  • Proximity Limit Switches: These switches operate based on the presence of a metal or magnetic object in close proximity without direct contact.

Typical Applications: Automated machinery, robotics, conveyor systems, and security applications.

  • Adjustable or Potentiometer Limit Switches: These switches house an adjustable actuator or potentiometer that sets the switch's trip point or position threshold.

Typical Applications: Fine-tuning the detection point in various automated systems, such as CNC machines or printing presses.

  • Safety Limit Switches: Safety switches are designed for applications requiring safety-related functions and compliance with safety standards.

Typical Applications: Emergency stop circuits, machine guarding, safety interlocks, and access control.

  • Sealed Limit Switches: As the name suggests, these switches feature a protective enclosure that prevents dust, moisture, and other contaminants from affecting the switch's operation.

Typical Applications: Harsh environments, outdoor equipment, and industrial machinery.

Why Choose Enrgtech for Limit Switches?

Enrgtech offers branded and advanced limit switches at reasonable prices and speedy delivery services. The company carries an extensive collection of great-quality, great-value products with various choices trusted by engineers worldwide. Get your hands on versatile products by visiting our website.


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3SE03AT16PC, Siemens
46 In Stock
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£ 309.36
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3SE03BW16P, Siemens
78 In Stock
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£ 380.88
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3SE03SN, Siemens
5 In Stock
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£ 142.29
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39 In Stock
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£ 242.34
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3SE03BL16P, Siemens
57 In Stock
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£ 391.82
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31 In Stock
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£ 353.14
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36 In Stock
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£ 319.75
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45 In Stock
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£ 290.03
3SE03AT36PC, Siemens
49 In Stock
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£ 333.44
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60 In Stock
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£ 414.44
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3SE03BT16P, Siemens
72 In Stock
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£ 385.25
3SE03BT36PC, Siemens
76 In Stock
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£ 482.30
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3SE03BW1, Siemens
77 In Stock
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£ 261.11
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3SE03EB06, Siemens
2 In Stock
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3SE03EB08, Siemens
93 In Stock
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£ 89.38
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2 In Stock
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40 In Stock
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51 In Stock
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£ 282.22
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52 In Stock
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55 In Stock
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£ 504.17
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59 In Stock
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£ 299.42
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63 In Stock
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£ 372.12
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66 In Stock
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£ 402.75
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3SE03BS36P, Siemens
69 In Stock
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£ 426.11
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3SE03EB07, Siemens
92 In Stock
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£ 88.59
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GSXA46D, Honeywell

GSXA46D, Honeywell

GSX Explosion Proof Limit Switches The GSX Series Explosion-Proof Safety Switches combine explosion-proof housing and engineering expertise. The positive break feature is designed to provide a safe failure mode, ensuring the machine will not start, and therefore supporting a safer work environment. The GSX Series switch platform allows for over 10,000 actuator and switch combinations. Snap-action contacts with positive break Positive action push plunger breaks current upon opening of door Explosion-proof housing for hazardous locations NEMA 1, 3, 4, 12, 13 and IP67 sealing cULus, ATEX, IEC Ex Simple installation Positive break feature Extensive switching options and actuator styles Approvals cULus, ATEX, IEC Ex
New items
BZLN-2-RH, Honeywell

BZLN-2-RH, Honeywell

LN Series Medium Duty Limit Switches The BZLN limit switch series from Honeywell is designed for use within a medium duty environment. The limit switches are designed to withstand rapid hammer-blow actuation. Impact on the actuating plunger cannot reach the precision switch unit inside. Individual seals around each leadwire and cover plate protect switch cavity from condensate, oil, and dust. Zinc die-cast housing Impact actuation resistant Honeywell Metal Enclosed These limit switches are suitable for most industrial applications, they have bifurcated contacts for switching wide current and voltage requirements, galvanically isolated contacts for switching different polarities between circuits and forced disconnect mechanism-independently tested. Approvals UL, CSA.
New items
SPVE110900, Alps Alpine North America, Inc.
New items
D449-R1LD-G2, ZF Electronics

D449-R1LD-G2, ZF Electronics

SWITCH SNAP ACTION SPDT 10A 250V
FAQs
We offer free shipping for orders over £200 if delivery is in the UK. All other orders in the UK, shipping from £7.99 depending on the weight and measurement. Mainland Europe shipping charges start from £25. For all other countries shipping charges start from £50 for products like Limit Switches and all others.
You can email us directly at sales@enrgtech.co.uk or via our website for any queries regarding Limit Switches or any other product.
This depends on the Limit Switches individual product and information that can be found on our website.
Yes, we offer special discounts on orders above £200 for Limit Switches and all other products.
UK orders normally take between 2/3 working days. International orders normally take between 3/5 working days for all products including Limit Switches.
Yes. We keep updating our stock frequently and if a product like Limit Switches is not in stock then we will let you know.