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Limit switches

Products: 51
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Magnetic sensor to open Door / window - reed contact CMD14 + screws

Wired proximity sensor activated magnetically. The device is used to determine the position of doors and windows. Case dimensions - 14 x 27 mm.
Index: SES-03104
Index: SES-03104
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Regular price €1.50 Price €1.50

Magnetic sensor to open door/window - reed contact CMD918

Wired proximity sensor activated magnetically. The device is used to determine the position of doors and windows. Case dimensions - 9.5 x 18 mm.
Index: SES-03126
Index: SES-03126
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Regular price €2.15 Price €2.15

Limit switch with roller - WK7141

Limit switch with a 5 cm long spring loaded lever ended with a roller. It operates at 250 V and the maximum load is 5 A. The limit switch is used to detect the position of the...
Index: AKS-14640
Index: AKS-14640
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Regular price €2.97 Price €2.97

Limit switch - WK821

Limit switch with curved handle. Maximum operating parameters: voltage of 250V and current of 16 A.
Index: PAS-00926
Index: PAS-00926
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Regular price €0.63 Price €0.63

Limit switch mini with lever - WK612

Limit switch with lever with the length of 29 mm. Maximum operating parameters: voltage of 250 V and current of 5 A.
Index: PAS-00929
Index: PAS-00929
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Regular price €0.41 Price €0.41

Contact reed switch straight 12 mm

Contact reed in the simple case with the 12 mm length.
Index: SES-03259
Index: SES-03259
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Regular price €0.46 Price €0.46

Mini limit sensor switch with lever - WK615 - 5pcs.

Limit switch with lever length 55 mm . The maximum operating parameters are 250 V and 5 A current.
Index: AKS-10825
Index: AKS-10825
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Regular price €2.58 Price €2.58

Limit switch 50mm - Pololu 1403

SPDT limit switch  position with extended metal plate with a length of 50 mm.
Index: PLL-00017
Index: PLL-00017
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Regular price €2.15 Price €2.15

Limit switch mini with lever - WK621 - 5 pcs.

Limit switch with curved lever with the length of 18 mm. The maximum operating parameters: voltage of 250 V and current of 5 A. 5 pcs.
Index: PAS-00920
Index: PAS-00920
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Regular price €1.71 Price €1.71

Limit switch mini with straight lever - WK320

Switch with a simple lever, length of 17 mm. Maximum working voltage is 125 V and current is 1 A.  Items are sold in sets of 5 pieces.
Index: PAS-02842
Index: PAS-02842
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Regular price €1.06 Price €1.06

Limit switch with folding roller - WK828

Limit switch with lever ended with roller. Maximum operating parameters: voltage of 250 V and current of 16 A.
Index: AKS-11239
Index: AKS-11239
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Regular price €1.67 Price €1.67

Magnetic sensor to open door/window - reed contact CMD932P

Wired proximity sensor activated magnetically. The device is used to determine the position of doors and windows. Case dimensions - 9.0 x 32 mm, it has mounting holes.
Index: SES-03127
Index: SES-03127
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Regular price €2.80 Price €2.80

Mini limit switch - 5pcs.

A small limit switch measuring 10 x 10 x 5 mm . Equipped with 4 pins. Included are 5 pieces of switches.
Index: PRO-17244
Index: PRO-17244
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Regular price €0.85 Price €0.85

Limit switch with straight lever - WK315 - 5 pcs.

Limit switch with a simple lever with a length of 13 mm. Maximum working voltage is 125 V and current is 1 A. 5 pcs.
Index: PAS-00921
Index: PAS-00921
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Regular price €1.02 Price €1.02

Contact reed switch v2 straight 20 mm

Contact reed in the simple case with the length of 20 mm.
Index: SES-03260
Index: SES-03260
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Regular price €1.63 Price €1.63

Limit switch mini - WK310 - 5pcs.

Limit switch without lever. Maximum operating parameters: voltage of 125 V and current of 1 A.
Index: PAS-00922
Index: PAS-00922
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Regular price €0.72 Price €0.72

Magnetic sensor to open door/window - reed relay HO-03L

Wired proximity sensor activated magnetically. The device is used to determine the position of doors and windows. Case dimensions - 19 x 23 mm.
Index: SES-03253
Index: SES-03253
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Regular price €1.93 Price €1.93

Magnetic sensor to open door/window - reed switch relay HO-03N

Wired proximity sensor activated magnetically. The device is used to determine the position of doors and windows. Case dimensions - 6,5 x 14 mm.
Index: SES-03254
Index: SES-03254
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Regular price €2.45 Price €2.45

Limit switch with roller - WK825 - 5pcs.

Limit switch with lever ended with roller. Maximum operating parameters is a voltage AC 250 V and a current of 16 A.
Index: PAS-00923
Index: PAS-00923
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Regular price €2.80 Price €2.80

Limit switch switch - WK812 - 5pcs.

Limit switch with a simple lever with a length of 28 mm. Maximum operating parameters is a voltage AC 250 V and a current of 16 A.
Index: PAS-00924
Index: PAS-00924
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Regular price €2.15 Price €2.15

Limit switch sensor with mini roller - WK626

Limit switch with lever ended with roller. Maximum operating parameters: voltage of 250 V and current of 5 A.
Index: PAS-05717
Index: PAS-05717
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Regular price €0.48 Price €0.48

Slot sensor 90° ITR9606 - Unit expansion module for development modules M5Stack

OP.90 is a slot sensor equipped with the ITR9606 sensor and has a 90° orientation. The module is equipped with an infrared diode and phototransistor. It can be used to...
Index: MSS-18076
Index: MSS-18076
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Regular price €3.67 Price €3.67

M5Stack Limit switch unit - M5Stack U145

Limit switch with 16 mm lever. The maximum operating parameters are the voltage of 5 V and the current of 3 mA.
Index: MSS-21650
Index: MSS-21650
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Regular price €5.40 Price €5.40

Module with limit sensor + wire - Iduino SE032

The module is equipped with a limit sensor and a 3-pin socket. It uses a digital signal for communication. It is powered by 5 V. The set includes a cable with a 3-pin plug.
Index: OST-14272
Index: OST-14272
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Regular price €1.93 Price €1.93

What are limit switches?

The limit switches presented here are electromechanical microcontrollers that are used in many industries. Most often they appear as limit microswitches and can be included in electromechanical microcontrollers. They are equipped with a housing that contains changeover contacts (the housing is also responsible for protecting the mechanism against external factors). Limit switches are small devices that detect movement and respond to changes in its range. They can be used in various applications, including in production automation as well as in building your own Internet of Things projects. An excellent example of the use of limit sensors and switches will be the construction of rotary tables, lever trucks, and hydraulic valves. They are a frequent component in automatic entrance gates to the property. They are responsible for determining the gate's end and start position. They control the position of objects also on product tapes, detect the position in other advanced machines.

These inconspicuous devices are really all around us. It is also good to mention that limit switches have many subtypes. There are even limit switches with a roller, a lever, without a lever, with a pin, with a rod, with a spring. Products can be made of various materials, but the most commonly recommended case material is high quality PVC.

How do the limit switches work?

What is the limit switches’ work principle? These devices are easy to use, but understanding the mode of operation is probably possible only with a basic knowledge of machine automation.

The operating principle of the limit switches is based on electromechanical switching of the movable contact position. This process occurs as a result of physical contact of the external object with the actuator, which exerts pressure on the limit switch lever. The switching threshold is modified by the user. When the actuator physically connected to the limit switch is rotated or moved, the result will be a change in the position of the given electrical contacts of the limit switch. Due to the fact that the limit switches have one stable position, two basic positions of internal contacts in a stable state are distinguished: contacts in the open position and contacts in the closed position (NO; NC).

Important advantages of the presented limit sensors are their long life, repeatedly high level of precision during switching, also in adverse environmental conditions. It is possible to switch high power electrical loads. The limit switch can be a key element in your project, especially if you are building an advanced IoT project.

Limit switches, reed switches and magnetic sensors – excellent components for alarm systems

One of the sub types of devices very close to the limit switches are Reed switches and magnetic sensors. You will find them in separate categories of the Botland store, but it is worth knowing that in many projects you will have to equip yourself with both reed switches and limit switches (limit sensors).

The reed contact is a switch whose position of the contacts is changed by applying a magnetic field source. This source can be a magnet or an electric circuit through which a sufficiently large current flows. In this situation, the contact system made of ferromagnetic material placed in a vacuum bubble in the glass bulb is short-circuited. As a result, the reed switch begins to conduct current in the electrical circuit of which it is a part. When the magnetic field source is removed, the reed switch contacts are opened. Open contacts mean a break in the power supply.

Reed switches and magnetic sensors are often mounted in buildings and are designed to activate an alarm or bell when doors or windows are opened. Together with limit sensors, they are used to build advanced and multi-functional property security systems and other IoT projects.