BEDOOK Metal Face Proximity Switch: The Industrial – grade Proximity Sensor with Superior Protection and Anti – corrosion Capabilities

The BEDOOK metal face proximity switch is an innovative and highly reliable sensing device designed to meet the demanding requirements of various industrial applications. It features a sleek cylindrical design, which is not only aesthetically pleasing but also functional. Available in diameters such as M8, M12, M18, and M30, it offers versatility in installation and integration into different systems.

This proximity switch operates on a DC3-wire system, which provides a stable and efficient power supply mechanism. Using stainless steel for the housing and the sensing face is a key design choice. Stainless steel is renowned for its exceptional strength and durability, making the switch capable of withstanding harsh industrial environments. It is resistant to corrosion, which is crucial in applications where the switch may be exposed to moisture, chemicals, or other corrosive substances. Moreover, the stainless-steel sensing face ensures accurate and consistent detection of metallic objects, forming the basis for its reliable performance.

Technical Performance of BEDOOK metal face proximity switch

Switching Frequency:

The BEDOOK metal face proximity switch’s switching frequency is set at 100Hz. This high-frequency capability allows the switch to respond rapidly to the presence or absence of metallic objects. In fast-paced industrial environments, such as conveyor-based manufacturing lines, where objects move quickly, this quick response time is essential. It ensures that the system can promptly initiate or halt relevant processes based on the detection of metallic components, thereby enhancing the overall efficiency and productivity of the production line.

Operating Voltage:

The operating voltage of the BEDOOK metal face proximity sensor ranges from 10 – 30VDC with a tolerance of ±10%. This wide voltage range provides significant flexibility in power supply options. It means that the switch can be integrated into various electrical systems, whether they operate on relatively low-voltage or high-voltage DC supplies. This adaptability makes it suitable for various industrial setups, from small-scale workshops to large-scale industrial plants.

Voltage Drop:

With a voltage drop of ≤2.0V, the BEDOOK metal face proximity switch minimizes power dissipation within itself. This low voltage drop is beneficial for several reasons. Firstly, it reduces the heat generated within the switch, which in turn enhances its lifespan and reliability. Secondly, it contributes to the overall energy efficiency of the system in which the switch is installed. By minimizing power loss, the switch helps to lower operational costs and improve the energy-saving performance of the equipment.

Load Current:

The load current of the BEDOOK proximity switch is specified as 100mA. This parameter defines the maximum current that the switch can supply to the load connected to its output. It is crucial for system designers and engineers to be aware of this limit to ensure proper matching of the switch with the connected electrical devices. For example, when connecting a relay or an indicator light to the switch, the load current requirement of these devices must not exceed 100mA to prevent damage to the switch and ensure stable operation.

No-load Current:

The no-load current of the switch is ≤10mA (at 24V). This indicates the current consumed by the switch itself when there is no load connected to its output. A low no-load current is highly desirable as it implies that the switch consumes minimal power in standby or idle mode. In large-scale industrial installations with numerous sensors and switches, the cumulative effect of low no-load currents across multiple devices can result in significant energy savings.

Hysteresis:

The hysteresis of the BEDOOK metal face proximity switch is <15% (Sr). Hysteresis plays a critical role in the accurate and stable operation of the proximity switch. It refers to the difference in the sensing distance when the object is approaching and when it is receding. By maintaining a proper hysteresis value, the switch can effectively avoid false triggering due to small fluctuations in the position of the metallic object. This ensures that the switch operates with high precision and reliability, even in environments with minor mechanical vibrations or object movement irregularities.

Repeat Precision:

The repeat precision of the switch is <1.0% (Sr). This parameter is a testament to the switch’s consistent performance over multiple detection cycles. In applications that demand high-precision sensing, such as in the manufacturing of precision-engineered components or in quality control inspection lines, a low repeat precision value is of utmost importance. It guarantees that the switch can repeatedly and accurately detect the presence or absence of a metallic object at the exact same position, thereby contributing to the overall quality and consistency of the production process.

Switch Protection:

The BEDOOK metal face proximity switch comes equipped with comprehensive switch protection mechanisms. These include short-circuit protection, polarity protection, and power-on protection.

Short-circuit protection safeguards the switch from damage in the event of a short-circuit in the output circuit. In industrial environments where electrical faults can occur due to various reasons, such as cable damage or equipment malfunction, this protection ensures the longevity and continued operation of the switch.

Polarity protection is essential as it prevents the switch from being damaged if the power supply is connected with incorrect polarity. This is particularly important in complex electrical systems where multiple power sources and devices are interconnected, and the risk of incorrect polarity connection exists.

Power-on protection helps to stabilize the switch’s operation during power-on and power-off cycles. It ensures a smooth transition of the switch’s state, preventing any sudden electrical surges or spikes that could potentially harm the switch or other connected components.

Action Signal Light:

The switch is fitted with an action signal light, which is an LED display light that activates after the switch has detected a metallic object. This visual indicator serves several important purposes. It provides immediate and intuitive visual feedback to operators and maintenance personnel, allowing them to quickly identify whether the switch has successfully detected an object. In complex industrial setups with numerous sensors and control systems, this visual cue can significantly simplify the monitoring and troubleshooting processes.

Environmental Temperature:

The operating environmental temperature range of the BEDOOK metal face proximity switch is from – 25°C to 70°C. This wide temperature range is a significant advantage, enabling the switch to be deployed in a broad spectrum of environments. From cold storage facilities where temperatures can plummet well below zero to high-temperature industrial settings such as foundries or heat-treating plants, the switch can maintain its functionality and performance. This adaptability to extreme temperatures makes it a versatile choice for a wide range of industries.

Protection Level:

The protection level of the switch is IP67. This classification indicates that the switch is dust-tight, preventing any dust particles from entering the switch and potentially causing electrical faults or performance degradation. Additionally, it can withstand temporary immersion in water, which is crucial in applications where the switch may be exposed to wet conditions, such as in outdoor installations or in industrial processes involving water spray or wash-down procedures.

Differences and Advantages of BEDOOK Metal-face Proximity Switch Compared to Common Proximity Switches

Common proximity switches typically feature copper-plated – tin housings and PBT/POM sensing faces. In comparison, the BEDOOK metal face proximity switch offers several distinct and significant advantages:

Material Durability:

The stainless-steel housing and sensing face of the BEDOOK switch provide unparalleled durability. Stainless steel’s inherent strength and resistance to corrosion make it far superior to copper-plated – tin in harsh environments. Copper-plated – tin, while initially having some protective properties, can degrade over time, especially when exposed to corrosive agents such as acids, alkalis, or salts. In contrast, the stainless-steel construction of the BEDOOK switch ensures long-term reliability and resistance to wear and tear.

The PBT/POM sensing faces of common switches are prone to damage from mechanical impacts and abrasion. In industrial settings where objects may accidentally come into contact with the sensing face or where there is a high level of particulate matter in the air, these materials can quickly show signs of wear. The stainless-steel sensing face of the BEDOOK switch, on the other hand, can withstand such mechanical stresses and maintain its integrity and detection accuracy.

Reliability in Detection:

The BEDOOK metal face proximity switch’s precise technical parameters contribute to its superior detection reliability. Its low hysteresis and high repeat precision ensure that it can accurately detect metallic objects with minimal errors. In contrast, common switches with their less – precise design and material limitations may experience larger variations in detection accuracy.

The electromagnetic interference (EMI) resistance of the BEDOOK switch is enhanced due to its stainless-steel construction. Stainless steel provides better shielding against EMI compared to the materials used in common switches. This is crucial in environments with high levels of electrical noise, such as in industrial plants with numerous electrical motors, transformers, and other equipment generating electromagnetic fields.

Environmental Adaptability:

The wide operating temperature range of – 25°C to 70°C and the IP67 protection level of the BEDOOK metal face proximity switch make it highly adaptable to diverse environmental conditions. Common switches with less – robust materials may struggle to function properly in extreme temperatures or wet and dusty environments.

In applications where the switch may be exposed to chemical fumes or solvents, the stainless-steel construction of the BEDOOK switch provides an added layer of protection. The materials used in common switches may react with certain chemicals, leading to degradation of the switch’s performance or even complete failure.

Applications of BEDOOK metal face proximity switch

Food and Beverage Industry with Metal Detection Requirements:

In the food and beverage industry, product safety is of the utmost importance. Production lines often involve handling food products that may accidentally come into contact with metal objects, such as fragments from processing equipment. The BEDOOK metal-face proximity switch, due to its stainless-steel construction, is ideal for this application.

Stainless steel is hygienic and non-reactive with food substances, ensuring no contamination risk. Moreover, the switch’s durability allows it to withstand frequent cleaning and sanitization procedures, which are essential in food processing environments. In contrast, common switches with PBT/POM sensing faces may absorb moisture or chemicals during cleaning, leading to deterioration of their performance or even the release of harmful substances into the food products.

The accurate detection capabilities of the BEDOOK switch are crucial for identifying even the smallest metal particles in the food stream. This helps in preventing product recalls and ensuring consumer safety.

Marine and Offshore Applications:

Marine and offshore environments are extremely harsh, with high levels of humidity, salt-laden air, and frequent exposure to seawater. In these conditions, the corrosion-resistant properties of the BEDOOK metal face proximity switch are invaluable.

The stainless-steel housing and sensing face prevent the switch from corroding, ensuring its long-term operation. Common switches with other materials would quickly succumb to the corrosive effects of the marine environment, leading to frequent failures and costly maintenance.

The switch’s reliable detection performance is also essential in marine applications, such as in shipboard machinery control systems, where accurate sensing of metallic components is necessary for the safe and efficient operation of the vessel.

Metalworking and Foundry Operations:

In metalworking industries, such as foundries, forging plants, and machining workshops, the environment is characterized by high temperatures, large amounts of metal dust, and intense mechanical vibrations.

The BEDOOK switch‘s stainless steel material is highly resistant to metal dust adhesion. In foundry operations, where molten metal particles and dust are constantly present in the air, common switches with PBT/POM or other non-metallic sensing faces quickly accumulate dust, leading to inaccurate detection or even complete failure.

The switch’s ability to operate in high-temperature environments is also crucial. In metal-forging and heat-treating processes, temperatures can reach several hundred degrees Celsius. The BEDOOK switch’s wide operating temperature range allows it to function reliably in these conditions, while common switches with materials having lower melting points or heat-resistance capabilities would be rendered inoperable.

The mechanical robustness of the stainless-steel construction of the BEDOOK switch enables it to withstand the intense vibrations and shocks typical of metalworking machinery, ensuring continuous and accurate sensing of metallic workpieces and tools.