Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Operating Voltage | 5V DC |
| Output Signal | Digital Switching Output (0 and 1) |
| Detection Threshold | Adjustable via Potentiometer |
| Probe Material | Nickel-plated Steel |
| PCB Size | 3.2cm x 1.4cm |
| Mounting Hole Diameter | 3mm |
| Indicator LED | Power and Digital Switching Status |
| Compatible Platforms | Arduino, Raspberry Pi, ESP8266 |
| Application | Automatic Plant Watering Systems |
| Package Includes | 1x Sensor Module, 1x Probe with Cable |
Anonymous
Mar 26, 2026
Rating: 5/5
Compact and effective
Small footprint fits easily into my custom enclosure. The threshold potentiometer is smooth and holds its setting well. Highly recommended for beginner electronics projects.
Anonymous
Mar 24, 2026
Rating: 5/5
Great for educational kits
Bought ten of these for a workshop. All units performed consistently. Students found them easy to integrate into their smart garden prototypes. Excellent quality control.
Anonymous
Mar 18, 2026
Rating: 5/5
Perfect for my DIY irrigation project
This module works exactly as described. The sensitivity adjustment is very responsive, allowing me to set the exact moisture level needed before the pump activates. Easy to wire up with my Arduino.
Anonymous
Mar 12, 2026
Rating: 4/5
Good value but probes need care
The sensor detects moisture changes quickly. Just remember to wipe the probes clean every few weeks to prevent corrosion, which is common with this type of sensor. Overall great for the price.
Anonymous
Mar 06, 2026
Rating: 4/5
Does the job well
Successfully used this to keep my balcony herbs alive while on vacation. The activation point is consistent. Deducting one star only because the cable could be slightly longer.
Anonymous
Mar 02, 2026
Rating: 5/5
Reliable digital output
I appreciate the clear digital high/low signal. It makes coding the logic for my automatic watering system straightforward. The LED indicators are also helpful for debugging.
Q: Is the probe cable waterproof?
A: The metal probes are designed for soil insertion, and the immediate connection point is sealed. However, the entire length of the cable is not submersible; please keep the connector end dry.
Q: Can this sensor directly drive a water pump?
A: No, this module provides a logic signal only. You must use a relay module or a transistor circuit to safely switch the higher current required by a water pump.
Q: Does this work with 3.3V systems like ESP32?
A: Yes, it operates at 5V but the digital output is generally compatible with 3.3V logic inputs. For best stability, we recommend using a 5V power source for the module itself.
Q: What is the maximum current this board can handle?
A: The onboard comparator circuit draws very little current (approx. 20mA). The output pin is a signal line and should not source more than 50mA. It is intended to trigger other devices, not power them directly.
Q: How often do I need to replace the probes?
A: Lifespan depends on soil acidity and usage. With regular cleaning to remove oxidation, they can last several months to a year. For long-term deployment, consider coating them with a conductive protective layer.
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