Gravity Capacitive Level Sensor contactless flexible

The DFRobot Gravity is a capacitive liquid sensor that detects the level in non-conductive containers contactlessly through the container wall. The sensor is simply attached to the container from the outside with the integrated temperature-resistant and waterproof 3M adhesive tape and detects liquids through wall thicknesses of up to 5 mm. The flexible design allows installation on both flat and curved surfaces.

Note: The sensor is compatible with containers made of plastic, glass, and ceramic and is not suitable for metallic or otherwise conductive containers.

Features:

• Contactless detection through container walls up to 5 mm thick enables use without contact with the liquid
• Flexible design with 3M adhesive tape allows installation on flat and curved surfaces of non-conductive containers
• Digital output with ±0.25 % FS hysteresis provides a stable switching signal without flutter at the switching threshold
• Low power consumption of 290 µA at 5 V is suitable for battery-powered and energy-saving applications
• Wide operating temperature range from -30 to +85 °C enables use in indoor and outdoor environments
• Gravity-compatible 3-pin DuPont connector allows direct connection with Arduino, ESP32, and other microcontrollers

Application Examples:

• Monitoring the level of a water tank or rainwater container contactlessly and triggering an alarm when below a set level
• Fill level monitoring in vending machines or coffee machines without intervening in the liquid circuit
• Automatically capturing aquarium water levels and activating a refill pump when the level is too low
• Automating laboratory experiments in test tubes or glass flasks with contactless liquid level detection
• IoT fill level monitoring with ESP32 and WiFi for remote container level inquiries

Documentation:

• DFRobot Wiki – Non-contact Flexible Liquid Level Sensor

Technical Data:

• Manufacturer: DFRobot
• Manufacturer SKU: SEN0508
• Operating voltage: 2.5–5.5 V DC
• Power consumption: 290 µA (at 5 V), 235 µA (at 3 V)
• Output type: Digital (Low with liquid, High without liquid)
• Connection: 3-pin DuPont (VCC, GND, OUT)
• Detection distance: Max. 5 mm wall thickness
• Hysteresis: ±0.25 % FS
• Compatible containers: Non-conductive (plastic, glass, ceramic)
• Max. wall thickness: 5 mm
• Operating temperature: -30 to +85 °C
• Protection class: IP62
• Product weight: 2 g
• Package dimensions: 130 × 90 × 6 mm
• Gross weight: 5.5 g

Scope of Delivery:

• 1× Gravity Capacitive Liquid Level Sensor contactless flexible