Limit sensors and limit switches are components responsible for communication occurring within given electric circuits. They perform very important functions especially in advanced systems. The limit switch is a sensor device enabling switching in electrical circuits under the influence of object position change. This kind of components may be found easy in many industrial automation systems and similar usages. The limit sensors & switches are also used in simple building automation systems. The limit switches in our offer are characterized by small dimensions and easy assembly. In this category you can choose from various products. When choosing, take into account the most important parameters for you, such as - for example - the intensity and consumption of operating current, or the shape of the limit contact lever. The latter parameter affects the ability to adapt the tip of the limit switch to the individual design. Choose the best quality limit switches and limit switches now in our Botland store!
Step-Down Voltage Regulator D24V22F9 - 9V 2,3A - Pololu 2861
Index: PLL-04981
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- Reduced price
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Linear voltage regulator LDO 1,8V NCP1117DT18G - SMD TO-252 - 5pcs
Index: FAR-15251
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Limit switches
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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
Limit switch with curved handle. Maximum operating parameters: voltage of 250V and current of 16 A.
Index: PAS-00926
Index: PAS-00926
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
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
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
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
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
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
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
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
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
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
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
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
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
Limit switch mini switch - KW12
Switch limit with metal tile with a length of 29 mm. Maximum operating parameters: a voltage AC 250 V and a current of 5 A.
Index: MOD-05443
Index: MOD-05443
Limit switch with folding roller- WK7144
Limit switch with lever on a 50 mm long spring loaded spring ended with a folding roller. It operates with a voltage of 250 V and the maximum load is 5 A. It has small...
Index: AKS-14641
Index: AKS-14641
Limit switch with lever - WK611 - 5pcs.
Limit switch with lever with the length of 25 mm. Maximum operating parameters: voltage of 250 V and current of 5 A.
Index: AKS-10824
Index: AKS-10824
Limit switch with roller - WK7121
Limit switch with 7 cm long lever ended with a roller. It operates with 250 V and the maximum load is 5 A. The limit switch is used to detect the set position of the moving...
Index: AKS-14638
Index: AKS-14638
Limit switch without lever - WK807 - 5pcs.
Limit switch without lever. Maximum operating parameters: a voltage AC 250 V and a current of 16 A.
Index: PAS-00925
Index: PAS-00925
Grove - mini limit sensor with roller
Module from the Grove series equipped with a limit switch with lever ended with roller. Working voltage is 3.3 V and 5 V. T he kit includes a cable adapted to Seeedstudio Base...
Index: SEE-11335
Index: SEE-11335
Limit switch mini WK212 - 5pcs.
Miniature limit switch with dimensions 10 x 4.5 x 4.5 mm.
Index: PAS-06156
Index: PAS-06156
Limit switch mini with roller - WK625 - 5pcs.
Limit switch with lever ended with roller. Maximum operating parameters: voltage of 250 V and current of 5 A.
Index: PAS-00919
Index: PAS-00919
Limit switch mini - WK607 - 5 pcs
A limit switch with a lever ending in a roller. Maximum operating parameters are 125 V and 5 A current.
Index: PAS-00928
Index: PAS-00928
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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.