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The Grove Water Level Sensor is a very accurate sensor that can be helpful in water level sensing applications. It is completely waterproof and uses capacitive pads to detect water levels up to 10cm.

Features

High measurement accuracy: Since the sensor is based on capacitive sensing, The measurement accuracy is up to ±5 mm.
Outstanding corrosion resistance: Inevitably, some liquids may be corrosive during use, and with the help of corrosion-resistant materials, the sensor can be used for a long time.
Grove unified socket: The sensor ensures “Plug and Play” and could be versatile for various applications.

Description

The Grove Water Level Sensor is a very accurate sensor that can be helpful in water level sensing applications. It is completely waterproof and uses capacitive pads to detect water levels up to 10cm.

We used capacitive pads on the PCB of the module and did conformal coating over the PCB to make the sensor protect against moisture, dust, chemicals and high temperatures. We believe that this technique will allow you to make accurate water level measurements (±5mm accuracy) easily

Let’s look at the difference between few water level sensing methods.

	Ultrasonic Distance Sensor	Sensor based on Resistance	Grove – Water Level Sensor
Principle	Ultrasonic Waves	Resistance	Capacitance
Communication Interface	Digital	Analog	I2C
Operating Voltage	3.3/5V	3.3/5V	3.3/5V
Waterproof	No	Yes	Yes

Note

The blue oil layer on the surface of the module’s capacitance sensing area should be kept intact. When the oil layer is damaged and the test object is a conductive liquid, the test data may be abnormal.

Attention

When testing, the highest liquid level inserted should not exceed the white dividing line, otherwise it will cause a short circuit.

Applications

Tank overflow detection
Liquid level sensing applications

Specifications

Dimensions	20mm x 133mm
Weight	G.W 9.8g
Battery	Exclude
Operating voltage	3.3~5V
Measurement Accuracy	±5mm
Working Temperature Range	-40°C to 105°C
I2C Addresses	0x78 and 0x77
Interface	I2C