Limit Switch
Limit Switch Manufacturer
At Stronger, we are a renowned Limit Switch Manufacturer dedicated to providing high-quality, reliable limit switches for various industrial applications. Our products are designed to offer precise control and safety, ensuring optimal performance in automation and machinery operations.
- High rigidity structure, made of high-strength plasc and aluminum;
- Cast (head and lid clinging to the box);
- Small size, waterproof and oilproof structure;
- Built-in micro switch, double spring mechanism, longer mechanical life;
- Easy wiring circuit opening design.
| Operation Speed | 0.5mm-50cm/sec |
| Operating Frequency | Electrical: 30 Operations/Minute |
| Contact Resistance | 25mΩ max. (intial value) |
| Insulation Resistance | 100mΩ min (below 500VDC) |
| Shock | Mechanical Durable: 1,000m/Sec2(about 100G’S) |
| Malfunction: 300m/Sec2(about 30G’S) | |
| Ambient Temperature | -5~+65? (with no icing) |
| Humidity | <95% RH |
| Weight | About 130 to 190g |
| Degree of Protection | IP65 |
| Electrical Life | Above 500000 |
Limit Switch Operating Characteristics
| Operating Charcteristics | Model | ST-8104 | ST-8108 | ST-8111 | ST-8112 | ST-8122 | ST-8166 | ST-8101 |
| Operating Force | OF (Max) | 5.58N | 7.84N | 9.8N | 9.8N | 9.8N | 0.88N | 0.88N |
| Release Force | RF (Min) | 0.49N | 0.49N | 2.94N | 2.94N | 2.94N | ̶ | ̶ |
| Pre-Travel | PT (Max) | 20° | 20° | 1.5mm | 1.5mm | 1.5mm | 30mm | 30mm |
| Over-Travel | OT (Min) | 75° | 75° | 4mm | 4mm | 4mm | ̶ | ̶ |
| Movement Diffential | MD(Max) | 10° | 10° | 1.2mm | 1.2mm | 1.2mm | ̶ | ̶ |
| Total Travel | TT (Min) | 95° | 95° | 5.5mm | 5.5mm | 5.5mm | ̶ | ̶ |
| Operational Position | OP | ̶ | ̶ | 26±0.8mm | ̶ | ̶ |
Mini Limit Switch
ST-8104H
ST-8108H
ST-8111H
ST-8112H
ST-8122H
ST-8166H
ST-8101H
ST-8107H
ST-8168H
ST-8169H
WL LIMIT SWITCH
| Operation Speed | 1mm-2m/s |
| Operation Frequency | Mechanical: 120 operations/minute Electrical: 30 operations/minute |
| Contact Resistance | 15mΩ max. (intial value) |
| Insulation Resistancr | 100mΩ Min |
| Dielectric Strength | 50/60 Hz for 1 minute between terminals of the same polrity |
| 50/60 Hz for 1 minute between current-carrying and non-current-carrying metal parts | |
| 1500VAC, 50/60 Hz for 1 minute between each terminal and ground | |
| Vibration | 10-55Hz, 1.5mm double amplitude |
| Shock | Mechanical durable: 1, 000m/Sec2 (about 100G’S) |
| Malfunction: 300m/Sec2 (about 30G’S) | |
| Ambient Temperature | -10~+80? (With no Icing) |
| Humidity | <95% RH |
| Weight | About 275g |
| Degree of protection | Specification: IP66 |
Operating Characteristics
| Operating Characteristics | Model | ST-CA2 | ST-CA12 | ST-D | ST-D2 | ST-NJ |
| Operating Force | OF (Max) | 8.83N | 8.83N | 26.67N | 26.67N | 1.47N |
| Release Force | RF (Min) | 0.49N | 0.49N | 8.92N | 8.92N | ̶ |
| Pre-Travel | PT (Max) | 25°±5° | 25°±5° | 1.7mm | 1.7mm | 40±20mm |
| Over-Travel | OT (Min) | 60° | 60° | 6.4mm | 6.4mm | ̶ |
| Movement differential | MD (Max) | 16° | 16° | 1mm | 1mm | ̶ |
ST-CA2
ST-CA12
ST-D
ST-D2
ST-NJ
ST-D1
ST-CL
ST-WLCA32-42
ST SA LIMIT SWITCH
| Operation Speed | 0.5mm-50cm/sec |
| Operating Frequency | Electrical: 30 operations/minute |
| Contact Resistance | 25mΩ max. (initial value) |
| Shock | Mechanical durable: 1, 000m/Sec2(about 100G’S) |
| Malfunction: 300m/Sec2(about 30G’S) | |
| Ambient Temperature | -10~+65? (with no icing) |
| Electrical Life | Above 500000 |
| Degree of Protection | IP65 |
Operating Characteristics
| Operating Characteristics | Model | ST-SA-001 | ST-SA-003 | ST-SA-012 | ST-SA-021 | ST-SA-031 | ST-SA-051 | ST-SA-081 |
| Operating Force | OF (Max) | 7.84N | 7.84N | 7.84N | 3.92N | 3.92N | 3.92N | 1.47N |
| Release Force | RF (Min) | 3.92N | 3.92N | 3.92N | 0.98N | 0.98N | 0.98N | 0.49N |
| Pre-Travel | PT (Max) | 1.8mm | 1.8mm | 1.8mm | 20° | 20° | 20° | 30mm |
| Tripping Position | TP±10% | 2.0mm | 2.0mm | 2.0mm | 22.5° | 22.5° | 22.5° | 22.5° |
| Movement Differential | MD (Max) | 1.2mm | 1.2mm | 1.2mm | 10° | 10° | 10° | 14° |
| Over Travel | OT (Min) | 4.0mm | 4.0mm | 4.0mm | 75° | 75° | 75° | 20mm |
| Total Travel | TT (Min) | 5.8mm | 5.8mm | 5.8mm | 95° | 95° | 95° | 50mm |
| Rotary Indexing | 22.5° | 22.5° | 22.5° |
ST-SA001
ST-SA003
ST-SA012
ST-SA021
ST-SA 031
ST-SA 051
ST-SA 081
STZ LIMIT SWITCH
| Degrees of Protection | IP65 | |
| Allowable Operating Speed | Push Plunger Type: 0.01mm/s~0.5m/s | |
| Lever Type: 0.02mm/s~0.5m/s | ||
| Allowable Operating Frequency | Electrical | 20times/min |
| Rated Frequency | 50/60Hz | |
| Vibration | Mis-operation | 10~55Hz,1.5mm Double-Amptitude |
| Shock | Breakdown | Under 1,000m/s |
| Mis-operation | Under 100m/s2 (plunger & lever type), 50m/s2 (roller type) | |
| Ambient Temp | -10°~+80°(no ice) | |
| Ambient Humidity | Normal Type: 35%~85%RH | |
| Sealed Type: 35~95%RH | ||
| Electrical life | Above 500000 | |
| Operating Characteristics | Model | ST-6101 | ST-6102 | ST-6103 | ST-6104 | ST-6106 | ST-6143 |
| Operating Force | OF (Max) | 7.85N | 4.90N | 4.90N | 6.28N | 6.28N | 6.28N |
| Release Force | RF (Min) | 2.35N | 0.98N | 0.98N | 2.26N | 2.26N | 2.26N |
| Pre-Travel | PT (Max) | 2mm | 1mm | 1mm | 5mm | 5mm | 5mm |
| Over-Travel | OT (Min) | 5mm | 3.5mm | 3.5mm | 6mm | 6mm | 6mm |
| Movement Differtial | MD (Max) | 0.1mm | 0.12mm | 0.12mm | 0.4mm | 0.4mm | 0.4mm |
| Operational Position | OP | 45.8±1mm | 49.7±0.8mm | 49.7±0.8mm | ̶ | ̶ | ̶ |
ST-6101
ST-6102
ST-6103
ST-6104
ST-6106
ST-6143
WATERPROOF LIMIT SWITCH
| Rating | 5A 125V,3A 250VAC |
| Operating Speed | 1mm~1m/s |
| Operating Frequency | Mechanical: 120 Operations/min. Electrical: 30 Operations/min. |
| Contact Resistance | 15mΩ max.(initial) |
| Degree of Protection | IP67 |
Operating Characteristics
| Operating Characteristics | Model | ST-3104/3108 | ST-3111 | ST-3112 | ST-3107 | ST-3102 |
| Operating Force | OF (Max) | 5.69N | 17.65N | 17.65N | 17.65N | 17.65N |
| Release Force | RF (Min) | 1.47N | 4.41N | 4.41N | 4.41N | 4.41N |
| Pre-Travel | PT (Max) | 25° | 1.8mm | 1.8mm | 1.8mm | 1.8mm |
| Over-Travel | OT (Min) | 40° | 3mm | 3mm | 3mm | 3mm |
| Movement Differential | MD (Max) | 3° | 0.2mm | 0.2mm | 0.2mm | 0.2mm |
| Operational Position | OP | ̶ | 24.9±1mm(5) | 34.3±1mm(5) | 34.3±1mm(5) | 34.3±1mm(5) |
| mm | mm | mm | mm |
ST-3104
ST-3108
ST-3111
ST-3112
ST-3107
ST-3102
SAFETY LIMIT SWITCH
| Key Plug in Force | Max. | 14.7N(1,500gf) |
| Key Pull Out Force | Max. | 29.42N(3,000gf) |
| Pre Travel | 6±3mm | |
| Total Travel | (28mm) | |
| Force Required to Have Positive | Min. | 58.84N(6,000gf) |
| Positive Opening Travel | Min. | 10mm |
ST-4NS
Limit Switch
“Stronger” Make Limit Switch is an electromechanical device that consists of an actuator mechanically linked to sets of contacts. They are used to control a machine, as safety interlocks, to count object passing a point. Our Limit Switches with Oil tight & non- Oil tight in cast aluminum housing with contact element. Push Rod Normal Lever, angular lever is used to operate. We are well known Limit Switch Manufacturer.
Our Limit Switches deliver flawless, continuous as well as consistent performance even in highly contaminated atmospheres & in high shock & vibration applications. Therefore, we are considered as the best Limit Switch Manufacturer. Limit switches are devices used to detect the presence or absence of an object or to monitor and indicate whether the movement limits of that object have been exceeded. They are commonly used in industrial control systems and various mechanical applications to control machinery by turning it on or off when an object passes a certain point. This article explores the various types of Limit Switches and their applications.
With Latest Technology
The Limit Switch regulates the electrical circuit that controls the machine as well as its moving parts. And, the Limit Switches can be used as pilot devices for magnetic starter control circuits, also allowing them to start, stop, slow down, or accelerate the functions of an electric motor.
Types of limit switches
Limit switches can be categorized based on actuation type and contact configuration.
Based on the actuation type
Mechanical
- Plunger actuated:Plunger limit switches have a plunger or push button depressed by the moving object to activate the switch. They are ideal for simple on-off position detection. Their direct contact nature requires precise alignment, and they are not suitable for applications with high cycle rates due to wear on the actuator.
- Roller lever actuated:Equipped with a roller at the end of a lever, these switches are actuated by the movement of an object that pushes the roller. The roller reduces wear and allows for smoother actuation with less friction. They’re versatile, with adjustable levers for different actuation points, but they can be sensitive to misalignment, and the lever can be damaged by excessive force.
- Rod lever actuated:These switches are actuated by a rod or lever pushed by an object. They are typically more robust than roller lever switches and can withstand higher actuation forces but require more activation force.
- Cable pull:Activated by a pulled cable, these limit switches are great for perimeter guarding or monitoring large areas. They offer flexibility in switch placement relative to the moving object but require proper cable tension and can have less precise actuation than direct contact switches.
- Rotary actuated:Rotary limit switches are activated by a rotating cam or wheel that depresses the switch at certain positions. They are precise for rotational movements but require careful setup and can be complex to adjust.
- Whisker actuated: Whisker-type limit switches are sensitive tactile sensors that use a thin metal wire or “whisker” to detect the presence or position of objects through physical contact. They are valued for their high sensitivity and simple design, making them suitable for applications in industrial automation, robotics, and safety mechanisms where precise parts detection is necessary. However, they can be susceptible to environmental factors, prone to whisker fatigue and breakage, and require more maintenance.
Non-contact
These limit switches do not require physical contact with the object, which reduces wear and can be beneficial in harsh environments.
- Magnetic limit switches:Utilizing a magnetic field to detect the presence of a magnet or a ferrous object, these switches are durable and immune to dust, dirt, and moisture. However, their sensing range is limited, and they can be prone to false triggering in environments with stray magnetic fields.
- Inductive limit switches:These switches detect metallic objects through an electromagnetic field. They are robust against dust and moisture and are suitable for high-speed applications. However, they can only detect metal objects and have a relatively short sensing range.
- Capacitive limit switches:Capable of detecting both metallic and non-metallic objects by sensing changes in capacitance, these switches are versatile and can even detect materials through thin barriers. However, they can be sensitive to environmental changes like temperature and humidity.
- Optical limit switches:With a light beam, often infrared, to detect objects, these switches can offer high-speed actuation and are not affected by the object’s material. They can be sensitive to alignment, dirt, and dust on the sensor, and their performance can vary with the object’s surface and color.
Based on the contact configuration
Normally open (NO): The contacts in this configuration are open when the switch is resting and close when the switch is activated.
Normally closed (NC): The contacts are closed in the resting state and open when the switch is actuated.
Changeover or single-pole, double-throw (SPDT): These have a common terminal and two other contacts where the switch can either close the circuit with the normally open contact or open the circuit with the normally closed contact.
Other types
In addition to mechanical and non-contact actuation, specialized limit switches are designed for specific applications or environments.
Pressure limit switches: Pressure limit switches are actuated by a change in pressure and are often used in fluid power systems. They are sensitive to pressure variations and can be used to monitor flow rates, but they require calibration and can be affected by temperature fluctuations.
Thermal limit switches: Thermal limit switches respond to temperature changes and are used in heating and cooling systems. They provide reliable operation within certain temperature ranges but may not have the precision of dedicated temperature sensors like thermocouples or RTDs.
Choosing a limit switch
- When choosing a limit switch, consider the application’s specific needs, such as actuation method, environmental conditions, required precision, and potential for wear and tear.
- Mechanical switches are typically chosen for their reliability and simplicity in applications where direct contact is acceptable.
- Non-contact switches are preferred when contact with the object is undesirable or could lead to damage or in environments where the switch might be exposed to contaminants that could affect its operation.
- Specialized limit switches are chosen based on the specific parameters they are designed to monitor; such as pressure or temperature.
Limit switch applications
Industrial use
In industries, a Limit Switch provides position feedback for machinery. A Limit Switch can be used to determine when a mechanical part has reached the end of its travel on a production line. This is crucial in automated systems where precise control of movement is necessary. For example, Limit Switches are installed in conveyor belt systems at the end of the path to signal when an item has reached its destination. When the product touches the actuator of the limit switch, the contacts change state, sending a signal to the control system. This signal can stop the conveyor belt, prevent items from falling off the end, or trigger the start of another process, such as sorting, packaging, or stacking.
- Conveyor System.
- Transfer Machine.
- Automatic Turret lathes.
- Milling and boring machine.
- Radial Drill.
- High speed production machine.
Specifications
- Limit switches:
- Available in Normal / Snap action types
- Precision limit switches:
- 1 NO + 1 NC / 2 NO + 2 NC
- Operating force:
- From Light to Heavy duty applications
- Versatile mounting heads
- Rugged aluminium die cast housing
- Foot switches:
- With Guard / Shielded versions Twin switches also available
- Zinc die casting housing available on request
Diverse Range of Limit Switches
Stronger offers a wide variety of Limit Switches to cater to different operational requirements. Our portfolio includes:
- Omron Limit Switch Manufacturer: We provide top-of-the-line Omron limit switches known for their durability and precision.
- Square D Limit Switch Manufacturer: Our Square D limit switches are renowned for their robustness and long-lasting performance.
- Honeywell Limit Switch Manufacturer: We offer Honeywell limit switches that are synonymous with reliability and efficiency.
- Telemecanique Limit Switch Manufacturer: Our Telemecanique limit switches ensure seamless integration and high functionality in various systems.
Specialized Limit Switch Solutions
Stronger also specializes in manufacturing specific types of limit switches to meet unique industrial demands:
- Rotary Limit Switch Manufacturer: Our rotary limit switches are designed for precision control in rotary applications.
- Micro Limit Switch Manufacturer: We offer micro limit switches that provide accurate and reliable performance in compact spaces.
- Pizzato Limit Switch Manufacturer: Our Pizzato limit switches are engineered to deliver exceptional performance in challenging environments.
Safety and Advanced Features
Safety and advanced functionality are at the core of our product offerings:
- Safety Limit Switch Manufacturer: We manufacture safety limit switches that are essential for protecting machinery and ensuring safe operations.
- Limit Switch Sensor Manufacturer: Our limit switch sensors are designed to detect and control the movement of machinery with high accuracy.
- Magnetic Limit Switch Manufacturer: We provide magnetic limit switches that offer non-contact operation and are ideal for harsh environments.
Specialized Components and Applications
Stronger’s expertise extends to manufacturing specialized components and switches for various applications:
- Limit Switch Arm Manufacturer: Our limit switch arms are crafted for precise and reliable mechanical control.
- Roller Limit Switch Manufacturer: We offer roller limit switches that are perfect for applications requiring linear movement detection.
- Micro Switch Limit Switch Manufacturer: Our micro switch limit switches are compact and provide reliable snap-action switching.
- Plunger Limit Switch Manufacturer: We manufacture plunger limit switches that offer robust performance in high-stress applications.
- Pneumatic Limit Switch Manufacturer: Our pneumatic limit switches are designed for use in pneumatic systems, ensuring accurate control and operation.
Why Choose Stronger?
performance. Our Limit Switches are designed to meet international standards, ensuring they perform optimally in various industrial environments. Our team of experts is dedicated to providing exceptional customer service, ensuring you receive the best solutions tailored to your needs.
Conclusion
Stronger is your go-to manufacturer for a wide range of Limit Switches, including Omron, Square D, Honeywell, Telemecanique, rotary, micro, Pizzato, safety, magnetic, and many more. With a focus on quality, safety, and innovation, we are committed to delivering products that enhance your operational efficiency and safety. Trust Stronger for all your Limit Switch needs and experience the difference in performance and reliability.