--- product_id: 29425653 title: "5pcs LM393 3.3V-5V Soil Moisture Detect Sensor Soil Moisture Sensor Soil Hygrometer Detection for Arduino Automatic Watering System Robot Smart car" price: "£8.69" currency: GBP in_stock: true reviews_count: 8 url: https://www.desertcart.co.uk/products/29425653-5pcs-lm393-3-3v-5v-soil-moisture-detect-sensor-soil store_origin: GB region: United Kingdom --- # 3.3V-5V wide voltage range Fixed bolt holes for easy installation Adjustable sensitivity via potentiometer 5pcs LM393 3.3V-5V Soil Moisture Detect Sensor Soil Moisture Sensor Soil Hygrometer Detection for Arduino Automatic Watering System Robot Smart car **Price:** £8.69 **Availability:** ✅ In Stock ## Summary > 🌱 Stay ahead in smart gardening with precision moisture sensing! ## Quick Answers - **What is this?** 5pcs LM393 3.3V-5V Soil Moisture Detect Sensor Soil Moisture Sensor Soil Hygrometer Detection for Arduino Automatic Watering System Robot Smart car - **How much does it cost?** £8.69 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/29425653-5pcs-lm393-3-3v-5v-soil-moisture-detect-sensor-soil) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact & Durable Design:** Small PCB footprint with fixed mounting holes for hassle-free setup. - • **Customizable Sensitivity:** Fine-tune moisture detection thresholds with an intuitive blue potentiometer. - • **Plug & Play Compatibility:** Seamlessly integrates with Arduino and other microcontrollers for instant smart gardening. - • **Budget-Friendly Innovation:** Affordable 5-pack perfect for DIY projects and smart watering systems. - • **Dual Output Modes for Precision:** Get both digital simplicity and analog accuracy in one sensor. ## Overview The HiLetgo LM393 Soil Moisture Sensor is a versatile 3.3V-5V module designed for accurate soil moisture detection. Featuring dual digital and analog outputs, adjustable sensitivity, and easy mounting, it’s ideal for Arduino-based automatic watering systems and DIY smart garden projects. This 5-piece set offers reliable performance at an accessible price point, empowering millennial professionals to effortlessly optimize plant care and embrace smart home innovation. ## Description Wiring ( 4 -wire )： 1）VCC external 3.3V-5V2）GND External3）DO small board digital output interfaces ( 0 and 1 )4）AO analog output voltage of small platesInstruction:1.Sensor for detecting moisture in the soil2.Sodule is the blue potentiometer to adjust the threshold for soil moisture , clockwise adjustment, control humidity will be bigger, smaller counter-clockwise 3.Digital outputs D0 can be directly connected with the microcontroller through the microcontroller to detect high and low , thereby detecting soil moisture4.Small plates AO analog output modules can be connected and AD through the AD converter , you can get a more accurate value of soil moisture 5.Operating Voltage 3.3V-5V6.Has a fixed bolt holes for easy installation7.PCB Size : 3.2cm * 1.4mPackage Included:5*LM393 Soil Moisture Sensor Review: Good product - Needed these sensors for a school project. Worked as expected and didn't need to calibrate them. Very happy with my purchase. Review: Good for detecting a water leak - bad for detecting soil moisture - I gave this a 5 star review, mostly because it does it's job. It works great if you are wanting it to detect a water leak. However if you want it to detect soil moisture, it will quickly corrode. There are some hacks to make it last longer by turning the power on/off so current isn't always running through it, but really for what you're paying, you cannot expect the same thing as a $100 moisture sensor. It makes a great DIY "hey look what I can do" project for not much money. ## Features - This is a simple moisture sensor can be used to detect soil moisture, when the soil water shortage, the module outputs a high level, whereas the output low. - Use this sensor to make an automatic watering device that will keep your garden of plants unmanaged. - Module dual output mode, digital output is simple, more accurate analog output. - Sensitivity adjustable (Figure blue digital potentiometer adjustment) - Comparator using LM393 chip, stable job ## Technical Specifications | Specification | Value | |---------------|-------| | Customer Reviews | 4.3 out of 5 stars 158 Reviews | ## Images ![5pcs LM393 3.3V-5V Soil Moisture Detect Sensor Soil Moisture Sensor Soil Hygrometer Detection for Arduino Automatic Watering System Robot Smart car - Image 1](https://m.media-amazon.com/images/I/61wRJWEfo5L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good product *by N***E on July 13, 2025* Needed these sensors for a school project. Worked as expected and didn't need to calibrate them. Very happy with my purchase. ### ⭐⭐⭐⭐⭐ Good for detecting a water leak - bad for detecting soil moisture *by K***H on April 28, 2019* I gave this a 5 star review, mostly because it does it's job. It works great if you are wanting it to detect a water leak. However if you want it to detect soil moisture, it will quickly corrode. There are some hacks to make it last longer by turning the power on/off so current isn't always running through it, but really for what you're paying, you cannot expect the same thing as a $100 moisture sensor. It makes a great DIY "hey look what I can do" project for not much money. ### ⭐⭐⭐⭐ This is not for detecting water level in soil *by X***R on January 2, 2021* I am taking a point off for the wrong indication, you do not want to put this into soil it will corrode. It would also need an AC circuit to make it not corrode which you would need to modify this circuit to support. It is much better as a leak or water detection device. This is what I am using it for, to detect water leaks, in my setup. The device will self destruct if you leave it in water for any length of time. It will plate out you can put some conformal coating on it to help it last a bit longer in water, in the end though it is not the right part for soil moisture detection as advertised. If you are looking for a soil moisture detector you are better off with a capacitive style sensor. ## Frequently Bought Together - HiLetgo 5pcs LM393 3.3V-5V Soil Moisture Detect Sensor Soil Moisture Sensor Soil Hygrometer Detection for Arduino Automatic Watering System Robot Smart car - 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 - AEDIKO 4pcs DC 5V Relay Module - 1 Channel Relay Switch Board with Optocoupler Isolation, High or Low Level Trigger --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/29425653-5pcs-lm393-3-3v-5v-soil-moisture-detect-sensor-soil](https://www.desertcart.co.uk/products/29425653-5pcs-lm393-3-3v-5v-soil-moisture-detect-sensor-soil) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-27*