Top 10 Best liquid level sensors in 2026

Last Updated - 6/12/2026

🏆Best Choice

CQRobot

CQRobot Non-Contact Water/Liquid Level Sensor Compatible with Arduino, Raspberry Pi and Other Motherboards. for Industrial Production, Aquarium, Chemical Solution, Agriculture, Gardening, etc.

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•The CQRobot non-contact liquid level sensor realizes non-contact detection of the liquid level in a closed container. It adopts advanced signal processing technology and high-speed signal processing chip, breaking through the influence of container wall thickness. It is simple to install and easy to use, and can detect the level of various toxic substances, strong acids, strong alkalis and various liquids in high-pressure airtight containers.
•The principle is to use the inductive capacitance of water to detect whether there is liquid. When there is no liquid close to the sensor, the sensor has a certain static capacitance to the ground due to the existence of distributed capacitance on the sensor. When the liquid level slowly rises and approaches In the case of an inductor, the parasitic capacitance of the liquid will be coupled to this static capacitance, making the final capacitance value of the inductor larger.
•The changed capacitance signal is then input to the control IC for signal conversion, which converts the changed capacitance into a change of a certain electrical signal, and then a certain algorithm is used to detect and judge the degree of this change. When the change exceeds a certain amount It is considered that the liquid level has reached the sensing point when the threshold is reached.
•High stability, high sensitivity, strong interference ability, no external electromagnetic interference, special treatment for power frequency interference and common mode interference, strong compatibility, penetration of various non-metallic containers, such as plastic, glass, For ceramics and other containers, the sensing distance can reach more than 12mm; liquid, powder, and particulate matter can be detected.
•The sensor comes with 2 DIP switches, the right DIP switch controls the output voltage (high level) of the signal terminal (green line); when the DIP switch is dialed up, the high level is 5V; when the DIP switch is facing When dialing down, the high level is 3.3V. Compatible with Arduino, Raspberry Pi and Other Motherboards.

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$16.99

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EPTTECH

EPTTECH Smart TLC2206 WiFi Water Oil Fuel Liquid Tank Level Monitor Indicator Controller Remote Water Level Sensor TUYA Intelligent Liquid Level Detector

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•LONG MEASURING DISTANCE: 10cm to 3.0m(4 to 118 inches) from the sensor, which is suitable for different tanks.
•POWER ADAPTER: Input: 100-240V AC Output:9V DC.
•WIFI SIGNAL:The sensor needs to connect to router to get wifi signal.Wifi range is 30m when no obstacle
•SAFETY AND HIGH RELIABILITY:IP67 waterproof.CE,Rohs and Reach certification.
•REMOTE OIL TANK MONITORING: Check your tank level from your smartphone – anytime, anywhere! No need to open the tank from time to time.
•FULL AND LOW LEVEL ALERTS: You will receive message alerts when it is full or low level. Or set the alarm level by app
•MULTI TANK MORNITORING:One app can monitor as many as 50 sensors.You can connect multi tanks easily
•EASY TO INSTALL:There is a nut to install the sensor.Install the sensor on top of the tank.
•OPERATING TEMPERATURE RANGE-10℃~+70℃: suitable for most weather conditions.

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$53.00

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EPTTECH

Food Grade Optical Infrared Water Liquid Level Sensor 500mm Cable High Sensibility, Working with Liquid Level Controller(Pack of 3)

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•They have no moving parts and are ideal for point level sensing of water and other liquids.
•Installation is simple and quick through the tank top, bottom or side.
•The sensor offers ±1 mm accuracy and broad liquid compatibility.
•They are suitable for high, low or intermediate level detection in practically any tank, large or small.
•Cable length 500mm.Input 5VDC,Analog output,XH2.5 connector
•1 YEARS WARRANTY:EPTTECH has provided liquid detection solution for over 20 years.1 years gurranty for longterm service.

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$8.80

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Taidacent

Taidacent Non Contact Liquid Level Sensor Contactless Water Level Sensor Externally Attached Pipe Water Float Switch NPN Output Capacitive

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•The intelligent non-contact liquid level sensor utilizes advanced signal processing technology and a high-speed signal processing chip to overcome the impact of container wall thickness, enabling accurate non-contact liquid level detection in sealed containers.
•The liquid level sensor (probe) is installed above and below the outer wall of the container to be tested (the high and low positions of the liquid level). The non-metallic container does not need to be opened, and the installation is simple and does not affect the production.
•The liquid level of various toxic substances, strong acids, strong alkalis and various liquids in the high-pressure closed container can be detected.
•The liquid to be tested is required to be electrically conductive, the contact surface is non-metal, and the pipe is easy to install and can be widely used.
•NPN output: If there is induction, the output is low level; no induction, disconnected

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$18.50

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MORAYELEC

Moray ME201R Tuya Smart Life APP IP65 Wireless WiFi Ultrasonic LED Temperature Indicator Time Fuel Display Wireless Water Tank Level Sensor Gauge Liquid Level Controller

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•LONG MEASURING DISTANCE: 10cm to 4m(4 to 157 inches) from the sensor, which is suitable for different tanks.
•POWER ADAPTER: Input: 100-240V AC Output: 5V DC.
•WIFI:Between Gateway and router(max 50m no obstacle) RF433MHz:Between sensor and Gateway (max 500m no obstacle)
•SAFETY AND HIGH RELIABILITY:IP65 waterproof.CE,Rohs and Reach certification.
•REMOTE OIL TANK MONITORING: Check your tank level from your smartphone – anytime, anywhere! No need to open the tank from time to time.
•FULL AND LOW LEVEL ALERTS: You will receive message alerts when it is full or low level. Or set the alarm level by app
•MULTI TANK MORNITORING:One app can monitor as many as 10 sensors.You can connect multi tanks easily
•EASY TO INSTALL:There is a nut to install the sensor.Install the sensor on top of the tank.
•OPERATING TEMPERATURE RANGE-10℃~+70℃: suitable for most weather conditions.
•1 YEARS WARRANTY:MORAY ELEC has provided liquid detection solution for over 20 years.1 years gurranty for longterm service.

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$65.50

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MAUJOY

Liquid Level Indicator with Loud Audible Alarm to Signal Cup Mug Full for Blind or Visually Impaired,Cup & Mug Pouring Level Detector Beeper for Hot or Cold Drinks

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•√ Liquid Level Indicator: Small enough to take with you.Liquid Kettle Pouring Assistance for The Visually Impaired.
•√Material: Stainless Steel Pins+ABS plastic Base,Auto zero resetting & auto power off.Equipped with high sensitive system for the liquid/water.
•√ STOP SPILLIAGES: Two Stage level alarm with Loud Audible Alarm function.Warning System for Safer, Neater Pouring.Our products are designed to assist the elderly and less able in their daily lives.
•√ FITS MOST MUGS, CUPS AND GLASSES: Clips on to the side of most regular cups, mugs and glasses.Easy to attach to most glasses and cups to have audible indicator of liquid levels to prevent overspill.
•√ Great Gift: Simple to use liquid level indicator for blind, visually impaired or elderly. The best for older mother, father, grandparents or friends.

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$16.98

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WWZMDiB

WWZMDiB 12 Pcs Water Level Sensor for Arduino DIY, Compatible with Arduino, Electronic Component, Liquid Level Sensor

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•Water Level Sensor: Determine water level by measuring the volume of a drop/water with a series of exposed parallel wires
•Working voltage: DC 3-5V
•Operating current: less than 20mA
•Commonly used in: HVAC, dehumidifiers, testing instruments, automobiles, automatic control, weather stations, humidity regulators and other related temperature detection and control

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$6.99

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Yosoo Health Gear

Liquid Level Sensor Cable Submersible Transmitter Water Level Sensor Detector Cable, IP68 Liquid Level Transducer, 4-20mA Water Level Sensor Detector

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•[Accurate Detecting] The Liquid Level Sensor Cable features a high precision silicon diffusion input level transmitter that provides more accurate detecting and monitoring of water levels. This ensures greater reliability and optimal performance
•Equipped with a full digital conditioning circuit and 4-20mA output, this Submersible Transmitter Water Level Sensor Detector Cable promotes and more data. This feature is essential for various applications when accuracy is critical
•[Sturdy and This Liquid Level Transducer Sensor Cable has multi layer IP68 , ensuring and long lasting use. Its 45 degree oblique angle anti impact and probe detachable anti blocking design make it even more and rugged
•[Wide Temperature Range] The Liquid Level Sensor Cable can operate within a temperature range of -40-80℃, providing greater flexibility across various applications. Its temperature compensation feature ensures accurate and data, even in varying environmental conditions
•[Versatile Compatibility] Made from 304 stainless steel, this sensor cable can measure water levels accurately. It is not recommended to measure other liquids or liquids that can corrupt stainless steel. However, it is compatible with different power supply voltages and can support 12-32VDC

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$32.80

$34.53

-5%

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Gikfun

Gikfun M8 Liquid Level Sensor Fish Tank Water Float Switch PP Plastic Ball Float Controller DIY Kit for Arduino EK1373x3

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

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$9.88

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Cirbic

Liquid Level beeping Indicator for Blind or Visually impaired (Blue)

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•Simple to use liquid level indicator for blind, visually impaired or elderly.
•Easy to attach to most glasses and cups to have audible indicator of liquid levels to prevent overspill.
•Small and easy to store. Measures 1.5 x 2.5 inch.
•Great gift for older mother, father, grandparents or friends.

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$17.49

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