Buy Capacitive soil moisture sensor Online in India

Name: Capacitive soil moisture sensor
Brand: The Tech Depot
SKU: TTD-18062
Price: 53.52 INR
Availability: InStock

Capacitive soil moisture sensor

Rs. 53.52

Capacitive soil moisture sensor

Rs. 53.52

TTD-18062

🚚 Delivery in 8–10 days

In stock

Shipping calculated at checkout.

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Looking to buy Capacitive soil moisture sensor at the best price in India? Tech Depot India offers competitive pricing, bulk discounts for orders of 10+ units, and dedicated technical support via email and WhatsApp. Whether you are a hobbyist, student, or professional engineer, we have everything you need for your electronics projects.

Corrosion-resistant capacitive soil moisture sensor from Tech Depot India, Bengaluru. Unlike resistive sensors, this module uses capacitive sensing to detect moisture levels without exposed metal electrodes - delivering longer lifespan, more stable readings, and reliable performance in real-world soil conditions. Ideal for automated plant watering systems, smart agriculture, and IoT garden projects.

Specifications

Sensor Type	Capacitive (No Exposed Electrodes)
Operating Voltage	3.3V - 5V DC
Output Signal	Analog Voltage (inversely proportional to moisture)
Output Voltage Range	~1.2V (wet) to ~2.5V (dry) at 3.3V supply (typical)
Operating Current	5 mA
PCB Dimensions	Approx. 98 mm x 23 mm (3.86" x 0.91")
Sensing Element	Copper traces beneath corrosion-resistant PCB coating
Interface	3-pin header - VCC, GND, AOUT
Compatible Boards	Arduino, ESP32, ESP8266, Raspberry Pi (with ADC), STM32, and more
Corrosion Resistance	High - no metal contacts exposed to soil
On-board IC	555 Timer / TLC555 (generates measurement signal)
Operating Temperature	-40 degreesC to +85 degreesC
Origin	Original / Authentic

Why Choose Capacitive soil moisture sensor?

100% Authentic

GST Invoice - A GST invoice is included with every order.

Expert Support - Dedicated technical help on WhatsApp and email.

Pan-India Delivery - Shipped across Bengaluru, Delhi NCR, Hyderabad and all of India.

Trusted by Makers - Used by students, hobbyists and professionals nationwide.

Key Features of Capacitive soil moisture sensor

Capacitive sensing technology: Measures soil moisture by detecting changes in capacitance rather than conductivity - no metal electrodes touch the soil, eliminating corrosion and electrolysis problems common with resistive sensors.
Dramatically longer lifespan: Resistive sensors degrade within weeks in moist soil. This capacitive module lasts months to years with consistent accuracy, making it viable for permanent installations.
Simple analog output: Provides a continuous analog voltage that decreases as soil moisture increases - connect directly to any ADC pin and start reading immediately.
Wide voltage compatibility: Operates at both 3.3V and 5V logic levels, working seamlessly with Arduino Uno, Nano, Mega, ESP32, ESP8266, STM32, and Raspberry Pi Pico.
Low power consumption: Draws only ~5 mA, making it suitable for battery-powered and solar-powered remote monitoring stations.
Compact and insertable design: Slim PCB profile slides easily into soil, pots, grow bags, and raised beds without disturbing roots.
No calibration circuitry needed: While calibration improves accuracy, the sensor works out of the box - just read the analog value and map it to your moisture scale.
Industrial temperature range: Rated from -40 degreesC to +85 degreesC for outdoor deployments in extreme climates.
No corrosion: Resistive sensors have bare metal probes that corrode within weeks in moist soil. Capacitive sensors have fully coated PCBs with no exposed metal.
Stable long-term readings: Resistive sensor readings drift as electrodes degrade. Capacitive readings remain consistent over months of continuous use.
No soil contamination: Resistive sensors release metal ions into soil through electrolysis, potentially harming plants. Capacitive sensors are chemically inert.
Better accuracy: Capacitive measurement is less affected by soil salinity and fertilizer concentration compared to conductivity-based resistive methods.
Lower maintenance: Deploy once and monitor - no need to periodically replace corroded sensor probes.

How It Works

The sensor operates on the principle that water has a significantly higher dielectric constant (~80) compared to dry soil (~3-5) and air (~1). An on-board 555 timer IC generates a square wave signal that passes through the copper traces embedded beneath the PCB's protective coating. These traces act as the two plates of a capacitor, with the surrounding soil serving as the dielectric medium.

As soil moisture increases, the dielectric constant of the surrounding medium rises, increasing the capacitance. This change in capacitance alters the frequency and duty cycle of the 555 timer's output, which is then converted to an analog voltage by the on-board circuitry. The result is a smooth, continuous voltage signal: higher voltage for dry soil and lower voltage for wet soil.

Because no metal is exposed to the soil, there is no galvanic corrosion, no electrolysis of water, and no gradual degradation of sensing surfaces - the fundamental advantage over traditional resistive fork-type moisture sensors.