Best Current Monitoring Relays of 2025

The Current Sensing Switch SZC23 No AL-CH Model is a self-powered, adjustable AC switch that can handle currents from 0.2A to 30A. It features an LED indicator for easy monitoring of its working status, a high-power MOS tube contactless electronic switch, and fast reaction speed in the ms level. This switch is ideal for current monitoring relays.

The Hawkeye Relay Combination Series is a space-saving solution for automation installers. These units combine a current switch and relay into a single package, allowing for start/stop control and status monitoring with one device instead of two. The current switch and relay operate independently of each other, making it easy to control fans and pumps with minimal space required. Ideal for current monitoring relays.

The Ejoyous Current Sensor is a versatile device that monitors AC current from 0.2 to 30A, allowing you to easily adjust settings with a potentiometer. An LED indicator provides a clear visual of the switch's operational status, enhancing your awareness. This sensor utilizes a high-power MOS tube for a contactless electronic switching experience, ensuring reliable performance even in strong magnetic environments. Additionally, it is self-powered, eliminating the need for external power sources and allowing for quick switching speeds. These features make it ideal for various applications, from AC motor overload protection to automatic control systems.

The Nodehawk Current Switch M3050 is a versatile AC current sensing switch designed to simplify current monitoring in various industrial applications. It uses the principle of mutual inductance to sense AC direct current and output normally open or normally closed switch signals. This allows for direct control of automated industrial equipment such as flash lamps, buzzers, relays, and microcontrollers. Compared to traditional transformers and thermal protectors, the M3050 offers more accurate and timely control while reducing design complexity and costs. With a response speed in the millisecond range and hysteresis of less than 1%, it can be used even in strong magnetic conditions. The switch also features LED indication for easy monitoring of the working status. Made with high-quality ABS material, the M3050 is heat-resistant, acid-alkali-resistant, and offers high impact strength for long-lasting performance.

The AUNMAS Current Sensor Switch is a versatile device designed for easy current monitoring without needing external power. With an adjustable action current range of 0.2 to 30A AC, you can customize it to fit your specific requirements. The built-in LED indicator provides a clear visual of the switch's operational status, ensuring you stay informed. Its contactless electronic design allows for high-speed switching without limitations on usage, making it ideal for various applications. The durable ABS casing enhances safety with impressive voltage isolation, ensuring reliable performance even in challenging environments.

This self-powered adjustable current sensing switch requires no external power supply and has an action current range of 0.2-30A AC, adjustable with a potentiometer. Its LED indicator can intuitively display the working status, while the hysteresis is less than 1%. This switch has no limit on the number of opening and closing and can be used under strong magnetic conditions. Made of self-extinguishing ABS material, it is suitable for AC current measurement, AC motor overload protection, electronic switch of automatic control system and more.

The SZC23-NO-AL-CH Current Switch Relay is a self-powered, contactless electronic switch with a straight-through structure design that can withstand isolation voltage up to 2000V. It is suitable for AC current measurement and monitoring, AC motor overload protection, and electronic switches for automatic control systems.

The BEP Digital Voltage Relay is designed for efficient voltage sensing in 12/24V systems. With compact dimensions of approximately 15 x 8.6 x 6.1 cm, it fits easily into various setups, ensuring you can integrate it without hassle. This product comes in a single package, making it straightforward for users to manage their installation needs. Originating from New Zealand, it reflects quality and reliability. By utilizing this relay, you can monitor current effectively, enhancing your system's performance and safety.

The Nikou Current Sensing Switch offers precise monitoring of AC currents from 0.2A to 30A, allowing you to easily adjust the action current with its built-in potentiometer. The integrated LED indicator provides a clear visual cue of the switch's operating status, making it simple for you to identify any issues. Its high-performance MOS tube ensures efficient and reliable switching, even under heavy use, while the self-powered design eliminates the need for external power sources, streamlining installation and improving reliability.

The KRIDA 8 Channel Relay allows you to control multiple devices easily. Each relay features a handy LED indicator, so you can quickly see its status. With the ability to connect up to eight boards via the I2C bus, you can expand your system effortlessly. The relays are designed for longevity, with a mechanical lifespan of over ten million operations, ensuring reliable performance. You can operate this module at both 3.3V and 5.0V, making it versatile for various projects. This flexibility enhances your control over AC and DC voltages, making it perfect for numerous applications.