Best Voltage Monitoring Relays of 2025

The GRV8-02 Voltage Relay is designed to monitor both AC and DC voltage accurately, ensuring your equipment remains protected from over-voltage situations. Its compact size makes it ideal for installation in tight spaces, while the LED indicator provides a clear visual of its operating status. You can easily select the operating mode using the rotary knob, adding convenience to your control processes. This relay is particularly useful for applications such as compressor protection and motor control, offering peace of mind in your electrical systems.

The DONGKER A30-U1 Monitor offers flexible settings for upper and lower voltage limits, allowing you to tailor detection parameters to your needs. With its capability to perform voltage detection, it ensures you are alerted to any overvoltage or undervoltage situations, helping to protect your devices. This device covers a wide voltage monitoring range from 0.1V to 99.9V, providing versatility for various applications. Additionally, it features separated measured and working voltage, enhancing safety and accuracy in your monitoring tasks.

The YALIDA Voltage Relay operates within a DC range of 6 to 80V and can handle a contact load of up to 30A. This high-quality monitoring relay features four operating modes, allowing you to tailor its functionality to your specific needs. With adjustable delay times from 0 to 999 seconds, you can easily manage when the relay activates or deactivates. Additionally, it includes a voltage detection channel, which helps you monitor and control voltage levels effectively, ensuring reliable performance in various applications.

The Walfront Voltage Current Protector is an essential device for safeguarding your electrical systems. It offers over and under voltage protection, ensuring that your equipment remains safe from voltage fluctuations. The double LED display allows you to easily monitor both voltage and current, providing you with real-time insights into your electrical usage. Additionally, the adjustable settings enable you to customise the overvoltage and undervoltage values, along with overcurrent protection and fault recovery delay, allowing for tailored protection that suits your specific needs.

The Jadeshay Voltage Protector offers essential protection for your electrical systems. It immediately cuts off power during overvoltage, undervoltage, or overcurrent situations, safeguarding your equipment. The device monitors three-phase systems, ensuring safety against phase sequence errors and asymmetries. With a clear LCD display, you can easily check voltage and current statuses at a glance, providing reassurance and convenience. Its straightforward installation on a DIN rail makes setup quick and hassle-free, allowing you to focus on other tasks.

The GAEYAELE Voltage Relay offers essential features for monitoring your operating circuit voltage accurately. It utilises True RMS technology, ensuring precise voltage measurements that can help you maintain safe electrical conditions. With adjustable over or under voltage trip settings, you can easily set the desired thresholds for protection. LED indicators provide clear status updates, allowing you to quickly assess the relay's performance at a glance. This compact device is designed for easy din rail mounting, making installation straightforward and convenient.

The Keenso Voltage Monitoring Relay offers multiple protections against voltage instability, ensuring your household electrical systems remain safe. Its voltmeter and digital display allow you to easily monitor voltage levels, providing peace of mind regarding your electrical consumption. With a fast response speed of just 50 seconds, you can trust that this relay will quickly react to any issues. Additionally, the use of flame retardant PA66 material guarantees durability and resistance to wear, making it a reliable choice for long-term use.

The VIFERR DVRD-12 Relay is a versatile voltage monitoring device designed for various applications, including DC motors and batteries. You can easily adjust the action time and set under voltage values between 10-14V and over voltage values between 13-17V. This ensures your equipment operates safely and efficiently. Furthermore, it monitors DC overvoltage and undervoltage faults in real-time without needing an additional power supply, providing peace of mind. Installation is straightforward due to its standard modular design for rail mounting.

The DEWIN Voltage Relay is designed to monitor its working voltage efficiently, providing both phase sequence and phase failure protection. With eight adjustable rated voltages, it can adapt to various electrical systems around the globe, ensuring versatility for users. The relay's operating status is easily visible through its LED indicators, with a green light for power and a red light for output status. Its ultra-small size allows for convenient installation on a 35mm DIN rail, making it ideal for various applications.

The GEYA Voltage Relay GRV8-01 offers reliable control over voltage supply, ensuring the safety of your electrical systems. With true RMS measurement, you can trust its voltage measurement accuracy, giving you peace of mind. You can easily select the operation mode using the convenient knob, allowing for straightforward adjustments to fit your specific needs. Additionally, the LED indicator keeps you informed about the relay's working status, making it easy to monitor performance at a glance.