Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Output Type | Analog |
| Operating Voltage | 3.3V - 5.5V DC |
| Sensor Principle | Capacitive Sensing |
| Material | Corrosion-Resistant PCB |
| Interface | PH2.0-3Pin |
| Dimensions | 60mm x 20mm |
| Weight | 4.5g |
| Compatibility | Arduino, Raspberry Pi, ESP32 |
| Durability | Long-term Soil Immersion Safe |
| Application | Smart Gardening, Agriculture Monitoring |
Anonymous
Mar 23, 2026
Rating: 5/5
Robust and reliable
The corrosion resistance is the main selling point here. I buried it deep in a raised bed, and it's handling the constant dampness perfectly. The analog signal is clean without much noise filtering required.
Anonymous
Mar 21, 2026
Rating: 4/5
Great value, needs calibration
Works exactly as described. The build quality is solid and the gold-plated contacts look durable. Just remember that you need to calibrate the dry and wet values in your code for your specific soil type, but that's standard for any moisture sensor.
Anonymous
Mar 16, 2026
Rating: 5/5
Best upgrade for old projects
Replaced all my old yellow probes with these. The difference in longevity is night and day. No more digging up dead sensors every few weeks. The price point makes it easy to stock up for multiple planters.
Anonymous
Mar 12, 2026
Rating: 5/5
Finally, a sensor that doesn't rust!
I've gone through three resistive sensors in the last year because they corroded within weeks. This capacitive module has been in my tomato planter for two months now with zero signs of degradation. The analog output is stable and easy to read with my Arduino.
Anonymous
Mar 03, 2026
Rating: 4/5
Good sensor, clear documentation needed
The hardware is excellent, but beginners might struggle slightly if they don't understand how capacitive sensing differs from resistive. Once I understood the principle, wiring it up was trivial. Works great with 5V logic too.
Anonymous
Mar 03, 2026
Rating: 5/5
Perfect for my automated irrigation system
Integrated this into my ESP32 project to control water pumps. The voltage range is flexible enough to run directly off the 3.3V pin. It responds quickly to changes in soil moisture levels. Highly recommended for DIY smart home projects.
Q: Can this sensor be left in the soil permanently?
A: Yes, unlike resistive sensors, this capacitive module is designed with corrosion-resistant materials specifically for long-term immersion in soil without degrading.
Q: How do I calibrate the sensor for different soil types?
A: You should read the analog value when the sensor is completely dry and again when fully submerged in water. Map these two values in your code to 0% and 100% moisture. Adjustments may be needed for clay vs. sandy soils.
Q: Is this compatible with 3.3V microcontrollers like the ESP8266?
A: Absolutely. The module operates on a wide DC voltage range of 3.3V to 5.5V, making it fully compatible with 3.3V logic boards like the ESP8266 and ESP32.
Q: What is the maximum depth I can bury this sensor?
A: While the electronics are coated, we recommend burying only the pronged section. Avoid submerging the entire PCB board or the connection interface to prevent potential water damage to the solder joints over extreme periods.
Q: Does it come with cables or do I need to solder wires?
A: The module typically comes with a PH2.0-3Pin connector. Depending on the specific kit purchased, it may include a matching cable, but you may need to solder header pins or wires if your setup requires it.
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