Technical Documents

Soil Moisture Sensor (YL-69) Soil Moisture Sensor Technical Datasheet

EMS-00019-A

Name: Soil Moisture sensor
Brand: Generic
SKU: EMS-00019-A
Availability: InStock

(Last updated) May 27, 2026

Soil Moisture sensor

Description

The Soil Moisture Sensor Module (YL-69 + FC-28) is a resistive soil humidity detection device used to measure water content in soil. It provides both analog (AO) and digital (DO) outputs with adjustable sensitivity using an onboard LM393 comparator. Ideal for smart irrigation systems, plant monitoring, Arduino, and IoT-based environmental projects.

Manufacturer Details

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

Vendor Suppliers

Amazon ( india ) Amazon ( Japan ) Amazon ( USA ) Amazon ( canada ) Robu.in ( India ) FlyRobo ( India )

Application Resources

Soil Moisture Sensor Appnotes Soil Moisture Sensor Arduino Tutorial

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