---
product_id: 43015872
title: "2pcs LM393 12V Soil Moisture Relay Module Soil Moisture Sensor with Soil Moisture Probe Wires for Smart Car"
brand: "hiletgo"
price: "$20.80"
currency: USD
in_stock: true
reviews_count: 5
category: "Hi Letgo"
url: https://www.desertcart.us/products/43015872-2pcs-lm393-12v-soil-moisture-relay-module-soil-moisture-sensor
store_origin: US
region: United States of America
---

# 12V power supply for reliable operation 3-5 sec delay prevents relay flicker 10A/1500W high-load relay capacity 2pcs LM393 12V Soil Moisture Relay Module Soil Moisture Sensor with Soil Moisture Probe Wires for Smart Car

**Brand:** hiletgo
**Price:** $20.80
**Availability:** ✅ In Stock

## Summary

> 🌱 Keep your garden thriving with smart, hassle-free moisture control!

## Quick Answers

- **What is this?** 2pcs LM393 12V Soil Moisture Relay Module Soil Moisture Sensor with Soil Moisture Probe Wires for Smart Car by hiletgo
- **How much does it cost?** $20.80 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/43015872-2pcs-lm393-12v-soil-moisture-relay-module-soil-moisture-sensor)

## Best For

- hiletgo enthusiasts

## Why This Product

- Trusted hiletgo brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Delay Function:** 3-5 second delay eliminates relay flicker, providing stable and reliable watering cycles.
- • **Robust High-Power Relay:** Handles up to 1500W load, perfect for powering pumps or irrigation systems without compromise.
- • **Anti-Rust Nickel-Plated Sensor:** Widened induction area with corrosion-resistant plating ensures long-lasting, accurate moisture detection.
- • **Plug & Play with Indicator LEDs:** Power and relay status LEDs keep you informed at a glance for seamless monitoring.
- • **Precision Soil Moisture Control:** Adjust the blue potentiometer to set your ideal soil humidity threshold with ease.

## Overview

The HiLetgo LM393 12V Soil Moisture Relay Module is a dual-pack smart sensor system designed for precise soil moisture monitoring and automatic irrigation control. Featuring a corrosion-resistant nickel-plated probe, adjustable humidity threshold via potentiometer, and a high-capacity 10A relay with a built-in delay to prevent flickering, it supports up to 1500W loads. Ideal for gardeners and smart car projects, it offers reliable, automated watering with clear LED indicators for power and relay status.

## Description

Instruction: Through potentiometer regulation soil humidity control valve value, can automatically on Garden, Garden automatically watering, family pot soil humidity of control, various electronic competition,, with high power following electric, can control big current device, is less than set humidity automatically started following electric sucking-in, is greater than set humidity automatically disconnect, and has delay function, solve no delay of humidity critical state following electric kept of flashing of problem, is a simple practical of soil humidity control system. Electrical parameters: Supply voltage: 12VDC input current: more than 100mALoad 250V AC or DC 30V 10A (current below this range can be used) Module description: 1. humidity detection sensor applied to soil; 2. the blue potentiometer modules are for soil moisture threshold adjustment, adjust clockwise, humidity will be under the control of the greater and turning it counterclockwise smaller; 3. because of this module with the time delay function, adjust the humidity value, about every mobility need to wait 5-8 seconds, relay changes in corresponding changes in the Green LED lights, until transferred to meet the requirements. Noted:When the sensor was triggered, the device will work. Package Included： 2*12V Soil Moisture Sensor Controller Module2* 20cm cables

Review: Designed backwards (unsafe to use) - The operation of this sensor assemble is design backwards for safety. If the power supply to the PCB fails or is unplugged and the pump is on another supply or the PCB burns out the relay will be in a position to continue to water until the water reservoir is empty. In my case I would have five gallons on my floor. To make this a usable product the relay should be activated when the sensor is dry which could then activate the pump or in my case a solenoid. If the unit failed the relay would most likely not energize and would not start the pump. Poor design unless water damage is not an issue for your setup. If this is used as a water sensor alarm it would be okay but it is being sold as a watering device.
Review: Needs power plug - Nice cost effective product but I suggest that a 12 vdc power cord with an appropriate plug be supplied as the 12 volt connection on the board has two prongs and needs a specialized connector plug.

## Features

- Using the company's high-quality soil sensors do detect soil moisture , the surface of nickel plated , has widened the induction area can improve conductivity, prevent contact with the soil rust problems and prolong life
- When two products can control a wide range of soil moisture , the corresponding threshold by adjusting potentiometer control , humidity is below the set value, start relay , while higher than the set value, the relay is disconnected
- Products with the delay function , delay of 3-5 seconds , when the humidity is detected in the critical state, the relay will not blink , flicker occurs a
- High-quality products using Songle relay can withstand 1500W load , to meet the requirements of most people
- Products with power indicator and relay instructions

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00LW14MP0 |
| Best Sellers Rank | #918,185 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #500 in Automatic Irrigation Controllers |
| Brand Name | HiLetgo |
| Coil Voltage | 12 Volts |
| Connector Type | Through Hole |
| Contact Current Rating | 10 Amps |
| Contact Type | Normally Open |
| Current Rating | 10 Amps |
| Customer Reviews | 3.5 3.5 out of 5 stars (16) |
| Manufacturer | HiLetgo |
| Maximum Switching Current | 10 Amps |
| Maximum Switching Voltage | 12 Volts |
| Model | 3-01-0325 |
| Mounting Type | Surface Mount |
| Operation Mode | Automatic |
| Part Number | 3-01-0325 |
| UPC | 702082655863 |
| Wattage | 1500 watts |

## Product Details

- **Brand:** HiLetgo
- **Connector Type:** Through Hole
- **Contact Type:** Normally Open
- **Current Rating:** 10 Amps
- **Mounting Type:** Surface Mount

## Images

![2pcs LM393 12V Soil Moisture Relay Module Soil Moisture Sensor with Soil Moisture Probe Wires for Smart Car - Image 1](https://m.media-amazon.com/images/I/61XDBjLij6L.jpg)
![2pcs LM393 12V Soil Moisture Relay Module Soil Moisture Sensor with Soil Moisture Probe Wires for Smart Car - Image 2](https://m.media-amazon.com/images/I/61cyxuZ+6rL.jpg)
![2pcs LM393 12V Soil Moisture Relay Module Soil Moisture Sensor with Soil Moisture Probe Wires for Smart Car - Image 3](https://m.media-amazon.com/images/I/51He7dOXHwL.jpg)
![2pcs LM393 12V Soil Moisture Relay Module Soil Moisture Sensor with Soil Moisture Probe Wires for Smart Car - Image 4](https://m.media-amazon.com/images/I/6130rQ-JKHL.jpg)
![2pcs LM393 12V Soil Moisture Relay Module Soil Moisture Sensor with Soil Moisture Probe Wires for Smart Car - Image 5](https://m.media-amazon.com/images/I/613mx9mRe5L.jpg)

## Customer Reviews

### ⭐ Designed backwards (unsafe to use)
*by C***R on July 27, 2023*

The operation of this sensor assemble is design backwards for safety. If the power supply to the PCB fails or is unplugged and the pump is on another supply or the PCB burns out the relay will be in a position to continue to water until the water reservoir is empty. In my case I would have five gallons on my floor. To make this a usable product the relay should be activated when the sensor is dry which could then activate the pump or in my case a solenoid. If the unit failed the relay would most likely not energize and would not start the pump. Poor design unless water damage is not an issue for your setup. If this is used as a water sensor alarm it would be okay but it is being sold as a watering device.

### ⭐⭐⭐⭐ Needs power plug
*by F***. on July 15, 2019*

Nice cost effective product but I suggest that a 12 vdc power cord with an appropriate plug be supplied as the 12 volt connection on the board has two prongs and needs a specialized connector plug.

### ⭐ Maybe NOT 12V
*by J***D on July 6, 2021*

It seems both the units I received were over powered with 12 volts. The relay clearly indicates 12 volt coil but after popping the first unit, I confirmed and double check voltage and polarity before popping the second unit.

## Frequently Bought Together

- HiLetgo 2pcs LM393 12V Soil Moisture Relay Module Soil Moisture Sensor with Soil Moisture Probe Dupont Wires for Smart Car Arduino
- Arduino Uno REV3 [A000066]
- ELEGOO 120pcs Multicolored Dupont Wire 40pin Male to Female, 40pin Male to Male, 40pin Female to Female Breadboard Jumper Ribbon Cables Kit Compatible with Arduino Projects

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-05-17*