Best Liquid Level Sensors of 2025

The Madison Liquid Level Sensor is a versatile and reliable solution for monitoring liquid levels. With its CE, UL, CSA, and NSF approvals, you can trust its performance. The electrical ratings of this sensor include 240 VAC, 0.14A; 120 VAC, 0.28A; 120 VDC, 0.07A; and 24 VDC, 0.28A, ensuring compatibility with various power sources. The stem and float are made of durable polypropylene, providing excellent resistance to corrosion. The 1/2" NPT mounting allows for easy installation. With a maximum pressure of 100 PSI and a temperature range of up to 221˚F (105˚C), this sensor can handle demanding environments. The Madison Liquid Level Sensor is an ideal choice for accurately monitoring liquid levels in a wide range of applications.

The MOLLIFII Liquid Level Sensor is designed to enhance your liquid management systems. Operating at 240VAC, it ensures reliable performance in various applications. With a maximum operating temperature of 221 degrees Fahrenheit, this switch is suitable for high-heat environments. Additionally, its float is designed for liquids with a specific gravity of 0.7, making it versatile for different fluid types. You can trust this sensor to open on rise, providing you with accurate monitoring and control of liquid levels, thus helping you prevent overflows and maintain optimal conditions.

The uxcell Water Level Sensor is a versatile liquid level control device that can be used for various applications. With its simple structure and convenient use, this float switch offers small volume and long working life compared to general mechanical switches. It can be installed at the top or bottom of the tank, allowing you to detect water rising or falling. Whether you need to control the water level in a tank or pump, monitor the water level in a fish tank or aquarium system, or even control the water level in household appliances, this float switch has got you covered. Please note that it cannot directly control high power devices, so small relays are required for transition.

The CQRobot Ocean Sensor is a non-contact liquid level sensor that allows for the detection of liquid levels in closed containers. It utilizes advanced signal processing technology and a high-speed signal processing chip to ensure accurate readings. The sensor is easy to install and can detect the level of various liquids, including toxic substances, acids, alkalis, and high-pressure liquids. With its high stability, sensitivity, and strong interference ability, it can penetrate various non-metallic containers such as plastic, glass, and ceramics. The sensor is compatible with Arduino, Raspberry Pi, and other motherboards, making it suitable for a wide range of applications including industrial production, aquariums, chemical liquids, agriculture, and gardening.

The Cirbic Liquid Indicator is a simple and convenient device designed for blind, visually impaired, or elderly individuals. With its easy-to-use features, this small device can be attached to most glasses and cups to provide an audible indicator of liquid levels. This helps prevent overspill and allows users to easily monitor their drink levels. The compact size of the Cirbic Liquid Indicator, measuring just 1.5 x 2.5 inches, makes it easy to store and carry around. Whether you want to ensure the safety of your older mother, father, grandparents, or friends, this liquid level indicator is a great gift option. With the Cirbic Liquid Indicator, you can provide a practical solution for those who need assistance with monitoring their liquid levels.

The EPTTECH Liquid Level Monitor offers a long measurement range from 10 cm to 3.0 m, making it versatile for various tank types. With its WiFi connectivity, you can easily check your tank levels from your smartphone, no matter where you are. The device is designed for reliability and safety, boasting an IP67 waterproof rating to withstand different weather conditions. Plus, you’ll receive instant alerts when your tank is full or low, allowing you to manage your liquids efficiently without the need for constant manual checks.

The EPTTECH infrared water liquid level sensor is an easy-to-install device that requires no moving parts, making it ideal for point level sensing of liquids. The sensor provides broad liquid compatibility and ±1 mm accuracy, making it suitable for high, low, or intermediate level detection in tanks of any size. The sensor comes with a 500mm cable, 5VDC input, and XH2.5 connector.

The EARUMZDQ Liquid Level Sensor is a high-quality, durable sensor designed for detecting water levels. It features a stable design with a solid structure and anti-bending properties, ensuring accurate and stable measurements. The sensor is made of 304 stainless steel, making it resistant to corrosion and suitable for long-term use. It also has a waterproof cable, adding to its durability. The sensor offers excellent performance with features such as reverse polarity and current limit protection, laser-proof temperature compensation, and programmable adjustment. With its 0-5m measure range and 6m cable, the EARUMZDQ Sensor is compatible with digital displays, PLCs, inverters, and recorders, making it a versatile choice for various applications.

The mxuteuk Float Switch is designed for effective water level monitoring in aquariums and tanks. It can handle a maximum contact rating of 10W and supports switching voltages up to 100V DC, ensuring reliable operation. With a maximum current of 0.5A, this sensor is both powerful and efficient. Its compact size, featuring a thread diameter of approximately 1.55 cm and a float ball size of 2.3 x 1.7 cm, allows for easy installation in various setups. Made from environmentally friendly PP material, it offers durability and strong resistance to acids and alkalis, making it a great choice for long-term use.

Anndason 6-Piece Water Level Sensor DP5200 is a package of six light blue and yellow water level sensors that can detect the water level in fish tanks or other liquid containers. The model number is DP5200, and the sensors have a maximum contact rating of 10W, a maximum switching current of 0.5A, a maximum breakdown voltage of 220V DC, and a maximum carry current of 1.0A. The float ball and body are made of P.P material, and the cable length is 39cm / 15.3".