MULTIPLE FUNCTION SENSOR DEVELOPMENT TOOLS GRAVITY ANALOG STEAM SENSOR, DF-ROBOT SEN0121

DFRobot SEN0121 Gravity Analog Steam & Water Sensor

The DFRobot SEN0121 Gravity Analog Steam & Water Sensor is a compact analog sensor designed to detect the presence of water droplets, steam, condensation, and surface moisture.

The sensor works by detecting changes in conductivity on its sensing surface. As the amount of moisture increases, the analog output voltage also increases, allowing a microcontroller to determine the relative level of wetness.

Thanks to its simple three-wire interface and support for both 3.3V and 5V power supplies, the SEN0121 is suitable for educational projects, IoT applications, environmental monitoring, robotics, and rapid prototyping.

Typical applications include steam and condensation detection, rain detection, water leakage monitoring, moisture-sensitive switches, and educational electronics experiments.

Features

• Detects steam, water droplets and surface moisture

• Analog output proportional to the detected moisture level

• 3.3V and 5V operation

• Simple 3-wire connection

• Compact design

• Suitable for Arduino and other microcontroller platforms

• Ideal for educational and prototyping applications

Specifications

• Manufacturer: DFRobot

• Manufacturer Part Number: SEN0121

• Sensor Type: Analog Steam & Water / Moisture Sensor

• Supply Voltage: 3.3V or 5V

• Output: Analog voltage

• Output Voltage @ 5V: 0 – 4.5V

• Output Voltage @ 3.3V: 0 – 3.0V

• Dimensions: 30 × 20 × 6 mm

• Interface: Analog output, GND, Power

Applications

• Steam detection

• Condensation detection

• Rain detection

• Surface moisture detection

• Water leakage detection

• Water level experiments

• Educational Arduino and Raspberry Pi projects

• IoT and embedded system prototyping

Package Contents

• 1 × DFRobot SEN0121 Steam Sensor

• 1 × Analog Sensor Cable

Note: The sensor connector is not waterproof and should not be immersed in water.