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4pcs Soil Moisture Detection Sensor with Probe 1.3m Cable/4.27ft DC 3.3-12V Digital and Analog Signal Output Compatible Raspberry Pi

The product includes four soil moisture sensors, each equipped with a corrosion-resistant probe (with a 1.3m/4.27ft cable). The dimensions of each sensor are 36mm (L) × 15mm (W) × 7mm (H) (1.42in × 0.6in × 0.28in). Voltage: 3.3-12VDC; Working Current: <20mA; Output Current: <30mA. The interface includes +-, DO, A0, where DO is for digital output and A0 is for analog output. Usage Scenarios: Projects and situations requiring soil moisture detection.Sensor Principle: The soil moisture probe detects moisture, and a voltage comparator determines the moisture level. When the moisture level exceeds the set value, the DO output goes low. The blue potentiometer is adjustable, allowing for sensitivity adjustment. The potentiometer adjustment only affects the [DO] port, with no effect on the [A0] output. The [A0] output is an analog signal (voltage) that can be directly detected via the microcontroller's AD port. The corrosion-resistant soil probe is designed to last for at least six months, offering high accuracy and fast response times.