Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Operating Voltage	3.3V - 5V DC
Output Type	Digital Switch Output (0 and 1)
Detection Area	40mm x 16mm
Board Dimensions	65mm x 20mm x 8mm
Comparator Chip	LM393
Sensitivity	Adjustable via Potentiometer
Interface	3-Pin PH2.0 Connector
Material	FR-4 PCB with Gold Plated Contacts
Compatibility	Arduino, Raspberry Pi, ESP32, STM32
Application	Water Tank Monitoring, Rain Detection, Leak Alarms

6 reviews

Anonymous

Mar 30, 2026

Rating: 5/5

Perfect for my aquarium project

This sensor works exactly as described. I used it to monitor the water level in my automatic plant watering system. The sensitivity adjustment is very responsive and easy to tune.

Anonymous

Mar 29, 2026

Rating: 4/5

Good value, needs calibration

Great little module for the price. You do need to spend a few minutes calibrating the potentiometer to get the trigger point just right, but once set, it is very reliable.

Anonymous

Mar 25, 2026

Rating: 5/5

Compact and effective

The size is perfect for tight spaces inside enclosures. The gold plating on the contacts seems to hold up well against constant exposure to moisture.

Anonymous

Mar 16, 2026

Rating: 5/5

Reliable and durable

I have deployed six of these in a flood detection prototype. They have been running for three months without any corrosion issues or false positives. Highly recommended.

Anonymous

Mar 14, 2026

Rating: 4/5

Works well for rain detection

Using this on my balcony to detect rain and close the windows automatically. It reacts quickly to droplets. Only wish the connecting wires were a bit longer.

Anonymous

Mar 02, 2026

Rating: 5/5

Easy to interface with Arduino

As a beginner, I found this very easy to connect. There are plenty of tutorials online, and the digital output makes coding straightforward. No complex libraries needed.

5 FAQ

Q: What happens if the sensor is submerged completely?

A: The sensor will output a high signal continuously while submerged. It is designed to withstand immersion, but long-term exposure to saltwater may accelerate corrosion.

Q: Is this module safe to use with drinking water tanks?

A: While the electronics are low voltage and safe, the PCB materials are not specifically certified for food-grade contact. We recommend using it for industrial or general monitoring purposes.

Q: Does this come with the connecting cables?

A: Yes, the package typically includes a 3-pin Dupont cable for easy connection to microcontrollers like Arduino or Raspberry Pi.

Q: Can I connect multiple sensors to one analog pin?

A: This module provides a digital output. To use multiple sensors, you should connect each to a separate digital input pin on your microcontroller.

Q: Can this sensor measure the exact depth of the water in millimeters?

A: No, this is a digital switch sensor. It detects the presence or absence of water at a specific point rather than measuring continuous depth levels.

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