Adafruit
12 eTape Liquid Level Sensor + extras
The eTape Liquid Level Sensor is a solid-state resistive sensor that measures fluid level without mechanical floats. As the liquid level rises, the hydrostat...
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The eTape Liquid Level Sensor is a solid-state resistive sensor that measures fluid level without mechanical floats. As the liquid level rises, the hydrostatic pressure compresses the sensor envelope, decreasing its resistance. The output is inversely proportional to the liquid height — lower liquid means higher resistance, higher liquid means lower resistance.
The sensor is resistive, so it can be read directly from a microcontroller or Arduino ADC pin with a simple voltage divider circuit. A 4-pin connector and 560Ω resistor are included so you don't need to solder directly to the delicate sensor pins.
Key Features
- Solid-State Design – No mechanical floats or moving parts
- Resistive Output – Easy to read with any ADC or microcontroller
- 12" Sensing Length – Suitable for tanks and containers up to 30cm deep
- Includes Connector & Resistor – 4-pin connector and 560Ω resistor included
Ideal For
- Hydroponics and aquaponics systems
- Aquarium and fountain level monitoring
- Rain gauge and weather station projects
- Pool and water tank controllers
- Arduino and microcontroller liquid-level projects
Package Contents
- 1× 12" eTape Liquid Level Sensor
- 1× 4-pin connector
- 1× 560Ω resistor
Jargon buster
Plain-language definitions for the technical terms used above.
- ADC
- An analogue-to-digital converter reads a changing voltage and turns it into a number the microcontroller can use. It matters when connecting analogue sensors such as light, sound, or variable-resistor sensors.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
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Sensors & Input
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