Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Operating Voltage | 3.3V - 5V DC |
| Output Signal | Digital Switch Output (0 and 1) |
| Detection Area | Approx. 5cm x 3cm |
| PCB Size | 32mm x 14mm |
| Indicator LED | Power and Digital Switch Output |
| Comparator Chip | LM393 |
| Sensitivity Adjustment | Adjustable via Potentiometer |
| Connector Type | 3-Pin PH2.0 or Dupont Header |
| Application Range | Smart Agriculture, Garden Automation, DIY Kits |
| Material | FR-4 PCB with Gold Plated Contacts |
Anonymous
Mar 30, 2026
Rating: 5/5
Excellent for school robotics kit
Bought this for a high school robotics competition. It was easy to integrate into our automatic watering system code. The digital output makes logic simple.
Anonymous
Mar 29, 2026
Rating: 4/5
Good module, needs waterproofing for long term
The detection is accurate and fast. However, if you plan to leave the probes in the soil permanently, I recommend coating the contacts with a conformal coating to prevent corrosion over time.
Anonymous
Mar 24, 2026
Rating: 4/5
Works as described
Simple plug-and-play for 5V systems. Just remember to use the analog pin if you want specific moisture levels, though this module is primarily designed for digital threshold detection.
Anonymous
Mar 23, 2026
Rating: 5/5
Perfect for my Arduino project
This sensor works flawlessly with my Arduino Uno. The sensitivity adjustment is very responsive, allowing me to calibrate it exactly for my potted plants. Great value for the price.
Anonymous
Mar 18, 2026
Rating: 5/5
Reliable and consistent
I've tested three of these units, and they all give consistent readings. The LED indicator is bright enough to see status at a glance without checking the serial monitor.
Anonymous
Mar 10, 2026
Rating: 5/5
Great addition to smart home setup
Integrated this with an ESP8266 to monitor my indoor herb garden. Notifications work perfectly when the soil gets too dry. Highly recommended for beginners.
Q: Does this measure exact moisture percentage or just dry/wet status?
A: This specific module provides a digital switch output (High/Low) based on a threshold you set with the potentiometer. For exact percentage values, you would need to read the analog signal from the probe directly, bypassing the comparator chip.
Q: What is the maximum current draw of this module?
A: The module typically draws less than 20mA when active. The power LED and comparator chip are low-power components suitable for battery-operated projects.
Q: How long can the probes stay in the soil before corroding?
A: The nickel-plated probes are durable, but prolonged exposure to moist soil can cause oxidation over several months. For permanent installations, we suggest applying a waterproof conformal coating to the metal traces.
Q: Is there a library available for this specific sensor?
A: Since this is a generic digital/analog sensor, it does not require a specific proprietary library. You can read it using standard digitalRead() or analogRead() functions in the Arduino IDE.
Q: Can this sensor be used directly with a 3.3V microcontroller like ESP32?
A: Yes, the module operates within a 3.3V to 5V range, making it fully compatible with 3.3V logic microcontrollers like the ESP32 or ESP8266.
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