Best Voltage Monitoring Relays of 2026

The GEYA Voltage Relay offers essential voltage protection with its adjustable features. You can easily choose the operation mode using a convenient knob, allowing for customized performance tailored to your needs. It provides accurate voltage measurements, ensuring that you are always aware of your system's status. Additionally, the LED indicator clearly shows the relay's working status, giving you peace of mind. With its compact design, measuring only 18mm in width, it fits effortlessly into tight spaces, making it a practical choice for any setup.

The GODIYMODULES Voltage Relay is designed to help you easily monitor DC voltage levels with its clear digital display. It lets you see the exact voltage at a glance, making it simple to keep track of your power source. The device works within a wide voltage range from 0 to 99.9 volts, so you can adjust it to fit your specific needs. If the voltage goes too high or too low, the relay activates automatically, protecting your equipment from damage. Plus, two buttons make setting the device quick and straightforward, giving you full control without hassle.

The LiebeWH Voltage Relay offers convenient real-time monitoring of DC overvoltage and undervoltage conditions, helping you protect your equipment from electrical faults. It features two indicator lights that clearly show different working states, so you always know what's happening. You can easily adjust the delay time for over-voltage responses, giving you control over how quickly the relay reacts. Plus, both the over-voltage and under-voltage limits are adjustable without needing extra power, making setup straightforward. Designed for easy rail mounting, this relay fits neatly into your system, providing a reliable and user-friendly solution for voltage protection.

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.

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 TOPINCN 4-Channel Relay is designed to operate on a 12V DC power supply, making it a reliable choice for your remote control needs. It features a low standby current of just 11-13 mA when one relay is active, helping you save energy. This module offers eight different control modes, including momentary, toggle, and timed delays up to 250 seconds, giving you flexibility to suit various applications. The default commands control four separate channels, allowing you to easily manage multiple devices remotely with simple phone tone signals. This makes it a convenient and versatile tool for remote switching tasks.

The Walfront Voltage Protector is designed to keep your electrical systems safe and running smoothly. It monitors for issues like too high or too low voltage, voltage imbalances, and phase problems, helping you avoid damage to your equipment. This device also protects against overcurrent, preventing potential overloads that could cause failures. Thanks to its automatic reset feature, it quickly restores normal operation without manual intervention, saving you time and hassle. You can easily check real-time voltage and current readings on its clear digital display, making it simple to monitor your power status at a glance.

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 Taidacent Voltage Comparator Relay Module is a versatile voltage monitoring relay that offers accurate channel difference, with a resolution accuracy of 0.1V. It comes in three versions: 5V, 12V, and 24V, allowing users to choose the one that suits their needs. This module is designed to compare input voltage with a reference voltage, which is set using a precision multi-turn potentiometer. When the input voltage exceeds the reference voltage, the relay is triggered, connecting the circuit and illuminating the corresponding channel indicator light. This feature is useful in various applications such as automotive circuit modification, industrial equipment, experimental testing, and circuit application testing. With its small channel difference and precise voltage comparison, the Taidacent Voltage Comparator Relay Module provides users with accurate voltage monitoring and reliable circuit control.

The LiebeWH Voltage Protector helps keep your DC-powered equipment safe by detecting both high and low voltage issues. This means you won’t have to worry about damage from unexpected voltage changes. It’s designed for easy installation on common 35mm DIN rails, so you can quickly set it up in your electrical panel without hassle. You can also customize the voltage levels that trigger the device and set delay times, making it fit perfectly with your specific system needs. Plus, it continuously watches your voltage in real time, providing fast response to protect motors and batteries from potential harm.