Two Arduino Water Level Sensor Modules (3.3V–5V Analog Rain Water Sensors) – Water Leak Sensor Modules / Water Detection Sensors for Tank Level, Flood Alarm & IoT Projects

This Water Level Sensor Module is a simple, reliable way to detect water presence and estimate water level using an analog signal. Commonly used as an Arduino water sensor, it works by measuring conductivity across the exposed sensing tracks, making it ideal for water detection, leak monitoring, and basic level sensing in containers. If you’re looking for a dependable water level sensor module for prototypes, student projects, robotics, or IoT systems, this module is a practical choice that’s easy to wire and program.

Designed to operate on both 3.3V and 5V systems, this water sensor module is compatible with popular microcontrollers and development boards. Many makers use it as a rain water sensor module for weather-related projects, or as a water leak sensor module for detecting spills, drips, and leakage. Because it provides an analog output, it can be used as an analog water sensor to measure “how wet” the sensor area is, not just whether water is present.

This module is also frequently searched as a rain sensor module Arduino solution for raindrop detection and water contact experiments. In real-world use, it can be positioned where water may accumulate, and your controller can trigger a buzzer, relay, pump, LED indicator, or send an alert when water is detected. Whether you need a water detection sensor for a small tank, a project enclosure, or a flood warning prototype, it’s a flexible tool for quick builds.

Key Features and Benefits:

Works as a water level sensor module with analog signal output for level estimation

Can be used as a water leak sensor module for leak detection and spill alerts

Commonly used as an Arduino water sensor in DIY, student, and IoT projects

Often used as a rain water sensor module / rain sensor module Arduino for raindrop detection builds

Supports both 3.3V and 5V control systems, making it suitable for different boards

Easy 3-pin connection for fast prototyping on breadboards or jumper wires

Applications:

Use this water sensor module in practical builds such as tank monitoring, small flood alarms, leakage alerts under sinks, water overflow detection, and simple water-triggered automation. It’s especially popular for beginners who want a straightforward water detection sensor for demonstrations and lab assignments. For plant systems and containers, it can help as a basic tank water level sensor module when placed at different heights or used for threshold detection. It also works well for IoT experiments as a water level sensor for IoT style project when paired with Wi-Fi/MCU boards.

Specifications:

Product name: Water level sensor

Operating voltage: DC 3V–5V

Operating current: < 20mA

Sensor type: Analog

Detection area: 40mm × 16mm

PCB process: FR4 double-sided HASL

Operating temperature: 10–30°C

Humidity: 10%–90% (non-condensing)

Product dimensions: 62mm × 20mm × 8mm

What You Get:

2 × Rain Water Level Sensor Module

Notes for Use:

This water level sensor module is designed for water contact detection and basic level sensing. For long-term continuous immersion, periodic cleaning and proper placement help maintain stable readings, since mineral deposits and corrosion can affect conductivity-based sensors over time. For best results, many users power the water sensor module only when taking a reading (rather than continuously), especially for leak alarm projects using a water leak sensor module approach.