Best Voltage Monitoring Relays of 2025

The LiebeWH Voltage Relay is a versatile device designed to protect your electrical systems. With adjustable settings, you can easily tailor both over-voltage and under-voltage thresholds to suit your needs, ensuring optimal performance. The two indicator lights provide clear visual feedback on the relay's status, helping you monitor its operation in real time. Additionally, this relay requires no extra power supply, making installation straightforward and hassle-free. Its rail mount design allows for easy integration into various systems, including motors, batteries, and industrial controls, enhancing the reliability of your setup.

LM YN Voltage Comparator is a versatile voltage monitoring controller that offers a wide measurement range and high accuracy. With its industrial-grade microcontroller as the main control unit, this module is made of genuine quality components for stable performance. It can be widely used in various voltage measurement and control scenarios. The controller provides five different preset functions, allowing users to set upper and lower voltage limits. With a measuring range of DC 0-100V and an accuracy of ±0.1V, this module ensures precise voltage monitoring. Additionally, it features an automatic power-saving function that can be customized, and all set parameters are automatically saved for convenience. The LM YN Voltage Comparator operates at a nominal voltage of DC 12V, making it a reliable choice for voltage monitoring relays.

The NOYITO Voltage Relay is designed for precise voltage monitoring, with a detection range of 0 to 99.9V and an accuracy of ±0.1V. This feature allows you to easily track and manage your voltage levels, providing peace of mind when charging or discharging batteries. It operates within a working voltage of 10-16V for the 12V version, ensuring compatibility with various systems. Additionally, the module has a low standby current of 16mA, which helps to conserve energy. The relay can handle a contact load of up to 10A, making it suitable for a wide range of applications.

The GAEYAELE Voltage Relay is designed to monitor both over-voltage and under-voltage conditions, offering you peace of mind with its true RMS measurement capabilities. You can easily choose the working mode using a convenient knob, allowing you to customize the relay to fit your specific needs. With its accurate voltage measurement, you can trust that your electrical systems are being monitored reliably. Additionally, the LED indicator clearly shows the relay's operational status, so you can quickly assess whether everything is functioning properly. This compact relay is perfect for any space, measuring just 18mm in width.

The Walfront Voltage Relay is designed for easy installation on standard rails, making it a compact and convenient choice for monitoring your DC motor. With real-time oversight of both overvoltage and undervoltage issues, you'll benefit from quick alerts and a stable performance. You won't need any extra power supply, simplifying your setup further. Additionally, the adjustable voltage settings allow you to customize the overvoltage and undervoltage thresholds, ensuring your equipment operates safely within desired limits.

The 3 Phase Voltage Monitoring Relay JVR800-2 is a three-phase voltage protector that integrates a chronograph, counter and voltage protection relay. It has overvoltage, undervoltage, phase loss, phase sequence, and unbalanced three-phase voltage protection, and does not require an external power supply. Users can test outputs and set power delay, while an optional manual or automatic reset module is available. The LCD display makes it easy to read data.

The YWBL-WH Relay offers over-voltage and under-voltage protection for DC systems. It has two sets of contacts, indicator lights for monitoring, and does not need extra power. You can adjust over-voltage and under-voltage settings in real-time. With a 35mm guide rail, it's easy to install and operate. Ideal for DC motors, batteries, UPS systems, and industrial controls, this relay ensures your equipment stays within safe voltage ranges.

The Walfront Voltage Protector is designed to ensure the safety of your equipment with its advanced features. It offers both automatic and manual reset options, allowing you to choose the best method based on your situation. You can easily adjust the overvoltage, undervoltage, and voltage imbalance settings to fit your specific needs, providing flexibility for various applications. Additionally, it continuously monitors your system in real-time to protect against issues like phase errors and disconnections, ensuring that your machinery operates smoothly and efficiently.

The Oumefar Voltage Relay provides essential protection for your electrical equipment by monitoring both over and under-voltage conditions. You can easily adjust the voltage settings to suit your needs, ensuring optimal performance. Real-time monitoring allows you to promptly detect any voltage faults, enhancing the safety of your devices. Additionally, the relay features two sets of contacts and indicator lights, so you can quickly assess its status without needing extra power sources. With its modular design, installation is straightforward, making it accessible for any user.

FTVOGUE Relay Module is a versatile voltage monitoring device that ensures your electrical system's safety. With the ability to regulate voltage during faults, it offers flexible use by adjusting overvoltage values and action times. The real-time monitoring feature alerts you to overvoltage and undervoltage issues promptly, allowing timely protective measures. The LED display provides clear indicators of the device's working status. Additionally, its rail mounting design simplifies installation on a 35mm rail without needing extra power. Experience peace of mind knowing your system is protected with FTVOGUE Relay Module.