Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Brand	Bekome
Model Number	BK-SM01
Operating Voltage	3.3V - 5V DC
Output Type	Digital (DO) and Analog (AO)
Detection Range	0% - 100% Moisture Level
Interface	3-Pin PH2.0 Connector
PCB Dimensions	32mm x 14mm
Probe Length	40mm
Compatibility	Arduino, Raspberry Pi, ESP32
Application	Smart Agriculture, Robot Cars, Garden Monitoring

6 reviews

Anonymous

Mar 28, 2026

Rating: 4/5

Works well but needs careful wiring

The sensor functions perfectly once wired correctly. Make sure to double-check your VCC and GND connections. The sensitivity adjustment screw is a nice touch for fine-tuning thresholds.

Anonymous

Mar 27, 2026

Rating: 4/5

Good value, easy to calibrate

Great little module for the price. Calibration was straightforward using the onboard potentiometer. Only giving 4 stars because the probe coating could be slightly more durable for long-term outdoor use.

Anonymous

Mar 25, 2026

Rating: 5/5

Perfect for my Arduino robot car project

This sensor works exactly as described. I integrated it into my smart robot car to detect wet surfaces, and the digital output is very responsive. The analog pin also allows for precise moisture level reading in soil tests.

Anonymous

Mar 18, 2026

Rating: 5/5

Compact and efficient

Small form factor fits perfectly into tight spaces on my custom PCB. The response time is quick, making it ideal for real-time monitoring applications in smart gardening systems.

Anonymous

Mar 06, 2026

Rating: 5/5

Reliable detection module

I've tested several soil sensors, and this Bekome model offers the best stability. No erratic readings even when the soil moisture changes gradually. Highly recommended for automation projects.

Anonymous

Mar 02, 2026

Rating: 5/5

Essential for school robotics kit

Bought this for a high school engineering project. It connected easily to our microcontroller and provided consistent data. The documentation included in the package was helpful for beginners.

5 FAQ

Q: Can this sensor be used directly with a 5V Arduino Uno?

A: Yes, this module operates within the 3.3V to 5V range, so it is fully compatible with the Arduino Uno without needing a logic level converter.

Q: Can I use this to detect water leaks on a floor?

A: Yes, while designed for soil, the conductivity principle works for detecting standing water on floors or in trays for leak detection systems.

Q: Is the probe resistant to corrosion over time?

A: The probes have a nickel plating to improve conductivity and reduce corrosion, but for long-term permanent installation in soil, we recommend applying a conformal coating or checking them periodically.

Q: What is the difference between the DO and AO pins?

A: The DO (Digital Output) pin provides a simple HIGH/LOW signal based on a threshold you set with the potentiometer. The AO (Analog Output) pin provides a continuous voltage value proportional to the moisture level.

Q: Does this come with jumper wires?

A: The package includes the sensor module only. Jumper wires are not included, but standard 3-pin Dupont wires will fit the connector perfectly.

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