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Soil Moisture Sensor
Soil Moisture Sensor
Soil Moisture Sensor
Soil Moisture Sensor
Soil Moisture Sensor
Soil Moisture Sensor
Soil Moisture Sensor
Soil Moisture Sensor
Soil Moisture Sensor
Soil Moisture Sensor

Technical Documents

Soil Moisture Sensor (YL-69) Soil Moisture Sensor Module

Application Resources

Soil Moisture Sensor Appnotes Soil Moisture Sensor Arduino Tutorial

EMS-00019-A

(Last updated) Jun 20, 2026

Soil Moisture Sensor

Soil Moisture sensor

Subcategory
EMS - Input: Sensors

Description

The Soil Moisture Sensor Module (YL-69 + FC-28) measures water content in soil using resistive sensing technology. It provides both analog (AO) and digital (DO) outputs, with adjustable sensitivity through an onboard LM393 comparator. Ideal for smart irrigation systems, plant monitoring, Arduino projects, greenhouse automation, and IoT-based environmental monitoring applications.

Manufacturer Details

Manufacturer Part Number
Sensor Probe Manufacturer Generic / OEM – YL-69
Comparator Module Manufacturer Generic / OEM – FC-28
IC Manufacturer Texas Instruments – LM393

Technical Specifications

Sensor Type Resistive Soil Moisture Sensor
Operating Voltage 3.3V – 5V DC
Output Type Analog (AO) and Digital (DO)
Digital Output 0 or 1 (TTL Logic)
Measurement Principle Resistance-based conductivity measurement
Sensitivity Adjustment Onboard Potentiometer (for digital threshold)
Probe Dimension Approx. 6 cm × 3 cm
Cable Length 20 cm
Interface Pins VCC, GND, DO, AO
Shipping Weight 0.02 kg
Shipping Dimensions (cm) 8 × 6 × 3

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