--- product_id: 31357087 title: "HiLetgo 3pcs LM393 Rain Drops Sensor Weather Moisture Monitor Sensor Humidity Sensitivity Module Nickeled Plate 3.3-5V for Arduino" brand: "hiletgo" price: "398387₫" currency: VND in_stock: true reviews_count: 10 category: "Hi Letgo" url: https://www.desertcart.vn/products/31357087-hiletgo-3pcs-lm393-rain-drops-sensor-weather-moisture-monitor-sensor store_origin: VN region: Vietnam --- # TTL output drives 100mA loads 5.4x4.0cm large sensing area Adjustable sensitivity potentiometer HiLetgo 3pcs LM393 Rain Drops Sensor Weather Moisture Monitor Sensor Humidity Sensitivity Module Nickeled Plate 3.3-5V for Arduino **Brand:** hiletgo **Price:** 398387₫ **Availability:** ✅ In Stock ## Summary > 🌧️ Stay ahead of the storm with precision rain sensing tech! ## Quick Answers - **What is this?** HiLetgo 3pcs LM393 Rain Drops Sensor Weather Moisture Monitor Sensor Humidity Sensitivity Module Nickeled Plate 3.3-5V for Arduino by hiletgo - **How much does it cost?** 398387₫ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/31357087-hiletgo-3pcs-lm393-rain-drops-sensor-weather-moisture-monitor-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 - • **Robust Signal Drive:** Strong 15mA comparator output and 100mA TTL drive capacity to power relays, buzzers, or small fans directly. - • **Plug & Play Simplicity:** Quick setup with just power, ground, and signal pins—get your weather station running in minutes. - • **Dual Output Flexibility:** Analog and TTL digital outputs provide versatile integration options for any Arduino or microcontroller project. - • **Optimized Design for DIY:** Large sensor board with mounting holes and clear LED indicators for intuitive installation and real-time feedback. - • **Precision Rain Detection:** Nickel-plated sensor ensures oxidation resistance and long-lasting conductivity for reliable moisture sensing. ## Overview The HiLetgo LM393 Rain Drops Sensor is a high-quality, nickel-plated moisture detection module designed for Arduino and DIY weather projects. Featuring a large 5.4x4.0cm sensing area, dual analog and digital outputs, and adjustable sensitivity, it offers reliable, oxidation-resistant rain detection with strong signal drive capabilities. Easy to install and integrate, this 3-pack sensor set is perfect for professionals and hobbyists aiming to build smart, responsive environmental monitoring systems. ## Description Instructions: When connected to a 5V power supply , power indicator light, no water droplets on-board sensors , DO output is high, switch lights off, drop a drop of water , DO output is low, the switch indicator lightBrush above water droplets, has returned to output high stateAO analog output can be connected to the microcontroller AD port to detect drops in the above rainfall sizeDO TTL digital outputs can also be connected to the microcontroller to detect whether there is rain .Features:Power indicator, output signal LED indicatorNo rain when the LED light output is high, the raindrop up, the output level, LED light.Large area raindrops, more conducive to the detection of rain.Board with positioning holes for everyone to installVoltage: 5VControl board board size: 3 * 1.6 MMLarge area raindrop test board 5.4 * 4.0 MMWiring:1. VCC: positive power supply (3-5V)2. GND: power supply is negative3. DO: TTL switching signal output4. AO: analog signal outputPackage Included:3*LM393 Rain Drops Sensor Review: Fun sensors and easy to use - I picked up this 3-pack to tinker with a weather station project, and I'm genuinely impressed by the simplicity of the technology here. It's fascinating that this little board can detect moisture just by measuring conductivity across the nickel-plated sensing plate—so basic, yet so effective. Using this with an Arduino was completely seamless. You get both digital (for a simple rain/no-rain signal) and analog (for moisture level) outputs, which gives you a ton of flexibility. Setup was just power, ground, and one signal pin; the whole thing took about five minutes. If you're into DIY electronics, these modules are cheap, super easy to integrate, and they work right out of the box. A great little component for any moisture-sensing project. Review: Fast shipping, quality product - I'm building out a complete DIY wifi enabled weather station. This is one of the many sensors involved in the project and will provide one more data point. The product was shipped quickly and worked right out of the box. Not necessarily a multi-buy product, but if you're looking for a good quality rain sensor for your DIY project, this is a good one. ## Features - The sensor uses high quality FR-04 double-sided materials, large area of 5.0 * 4.0CM, and nickel-plated surface, with oxidation resistance, conductivity, and life expectancy superior performance - Comparator output, the signal clean, good waveform, strong driving ability, more than 15mA - The raindrop board and the control board are separate, easy to lead the line - TTL level output, TTL output valid signal is low. Drive capacity of about 100MA, direct drive relays, buzzers, small fans, and so on. - Adjust sensitivity by potentiometer ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01DK29K28 | | Best Sellers Rank | #801 in Single Board Computers (Computers & Accessories) | | Brand | HiLetgo | | Centerline Length | 5.4 Millimeters | | Connector Type | Screw | | Date First Available | March 29, 2016 | | Is Discontinued By Manufacturer | No | | Item Pitch | 5.4 Millimeters | | Item Weight | 1.13 ounces | | Item model number | 3-01-0312-A | | Manufacturer | HiLetgo | | Material | Plastic | | Mounting Type | Surface | | Number Of Contacts | 6 | | Number Of Poles | 3 | | Package Dimensions | 4.37 x 2.87 x 1.1 inches | | Voltage | 5 Volts | ## Product Details - **Brand:** HiLetgo - **Centerline Length:** 5.4 Millimeters - **Connector Type:** Screw - **Item Pitch:** 5.4 Millimeters - **Manufacturer:** HiLetgo - **Material:** Plastic - **Mounting Type:** Surface - **Number Of Contacts:** 6 - **Number Of Poles:** 3 - **Voltage:** 5 Volts ## Images ![HiLetgo 3pcs LM393 Rain Drops Sensor Weather Moisture Monitor Sensor Humidity Sensitivity Module Nickeled Plate 3.3-5V for Arduino - Image 1](https://m.media-amazon.com/images/I/617ytyKRSnL.jpg) ## Questions & Answers **Q: Will these work with a Raspberry Pi?** A: Yes **Q: Will it work with a 12V supply?** A: You will want a good, stable 5 volt supply of using with Raspberry Pi. **Q: is it 5 or 3.3v? description says 5, but title says both.** A: It will work with either the 3.5 or 5 volt signal from your Arduino board. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Fun sensors and easy to use *by N***N on October 17, 2025* I picked up this 3-pack to tinker with a weather station project, and I'm genuinely impressed by the simplicity of the technology here. It's fascinating that this little board can detect moisture just by measuring conductivity across the nickel-plated sensing plate—so basic, yet so effective. Using this with an Arduino was completely seamless. You get both digital (for a simple rain/no-rain signal) and analog (for moisture level) outputs, which gives you a ton of flexibility. Setup was just power, ground, and one signal pin; the whole thing took about five minutes. If you're into DIY electronics, these modules are cheap, super easy to integrate, and they work right out of the box. A great little component for any moisture-sensing project. ### ⭐⭐⭐⭐⭐ Fast shipping, quality product *by D***H on October 2, 2024* I'm building out a complete DIY wifi enabled weather station. This is one of the many sensors involved in the project and will provide one more data point. The product was shipped quickly and worked right out of the box. Not necessarily a multi-buy product, but if you're looking for a good quality rain sensor for your DIY project, this is a good one. ### ⭐⭐⭐⭐⭐ These work fine, but have several on hand! *by G***N on February 2, 2022* These drop sensors seem to work pretty consistently out of the box. Rarely if ever get a unit with a problem, and their results seem repeatable across units. The downside to these devices (and this is not at all unique to this brand/unit) is that their job is literally to try to pass current through water, a situation that results in corrosion and degradation over a fairly short period of time. So, if you're using these for say a weather station or garden watering sensor, they'll do a great job for you....but have an extra on hand all the time, so you can swap out the board easily and quickly. 3 for 6 bucks makes that easy to do with these! ## Frequently Bought Together - HiLetgo 3pcs LM393 Rain Drops Sensor Weather Moisture Monitor Sensor Humidity Sensitivity Module Nickeled Plate 3.3-5V for Arduino - 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 --- ## 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.vn/products/31357087-hiletgo-3pcs-lm393-rain-drops-sensor-weather-moisture-monitor-sensor](https://www.desertcart.vn/products/31357087-hiletgo-3pcs-lm393-rain-drops-sensor-weather-moisture-monitor-sensor) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-04-26*