--- product_id: 78308126 title: "DC 5V Digital Thermostat Module -58℉ to 257℉ Fahrenheit Temp Display Temperature Controller Board with 20A Relay Waterproof Sensor Probe Dual LED Display Red Green" brand: "lm yn" price: "S$22" currency: SGD in_stock: true category: "Lm Yn" url: https://www.desertcart.sg/products/78308126-dc-5v-digital-thermostat-module-58-to-257-fahrenheit-temp store_origin: SG region: Singapore --- # 20A high-load relay Wide -58℉ to 257℉ range Dual red & green LED display DC 5V Digital Thermostat Module -58℉ to 257℉ Fahrenheit Temp Display Temperature Controller Board with 20A Relay Waterproof Sensor Probe Dual LED Display Red Green **Brand:** lm yn **Price:** S$22 **Availability:** ✅ In Stock ## Summary > 🌡️ Control your climate like a pro — precision meets power! ## Quick Answers - **What is this?** DC 5V Digital Thermostat Module -58℉ to 257℉ Fahrenheit Temp Display Temperature Controller Board with 20A Relay Waterproof Sensor Probe Dual LED Display Red Green by lm yn - **How much does it cost?** S$22 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/78308126-dc-5v-digital-thermostat-module-58-to-257-fahrenheit-temp) ## Best For - lm yn enthusiasts ## Why This Product - Trusted lm yn brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Fast & Reliable:** 0.5-second refresh rate keeps your environment perfectly tuned - • **Instant Feedback:** Dual LED display with red & green indicators for clear status - • **Powerhouse Relay:** Handles up to 20A load for robust HVAC or industrial use - • **Waterproof Sensor Included:** 1-meter NTC metal probe built for durability and accuracy - • **Precision at Your Fingertips:** Ultra-fine 0.1℉ resolution for critical temp control ## Overview The DC 5V Digital Thermostat Module offers professional-grade temperature control from -58℉ to 257℉ with ultra-precise 0.1℉ resolution in critical ranges. Featuring a dual red and green LED display for instant status updates, a durable waterproof 1-meter NTC sensor, and a powerful 20A relay, this compact device ensures fast, reliable, and accurate temperature management for HVAC, industrial, or home automation projects. ## Description LM YN Digital Thermostat Module User Manual https://1drv.ms/b/c/4a0865b22350d05c/IQBc0FAjsmUIIIBK9gAAAAAAAal-mE5E5Hc6Yvgjhsbk124?e=8eZ0WC Product Name: High-precision Digital Temperature Control Device. Dual LED display. The display font color: Red+Green. Temperature range: -58℉ to + 257℉. Resolution: temperature range -3.9℉ ~ 99.9 ℉ is 0.1℉, other temperature ranges 1 ℉ Temperature measurement accuracy: 1 ℉. Backlash accuracy: 0.1 ℉. Refresh rate: about 0.5S. Input Power: DC 5V. Measuring input: 1 meter long NTC (10K 0.5%) waterproof metal sensors. Relay Load: DC 14V 20A / AC 125V 20A. Humidity: 20% to 75%. Size: 46 * 40 * 16mm (L * W * H). Weight: 30g. Package Included: 1*Digital Thermostat Module ## Features - Dual LED display, Red and Green, Precise temperature control - Temperature range:-58℉ to + 257℉ ; Resolution: temperature range -3.9℉ ~ 99.9 ℉ is 0.1℉, other temperature ranges 1 ℉. - Temperature measurement accuracy: 1 ℉. Backlash accuracy: 0.1 ℉. Refresh rate: about 0.5S. Input Power: DC 5V. - Measuring input: 1 meter NTC (10K 0.5%) waterproof metal sensors. - Relay Load: DC 14V 20A / AC 125V 20A. ( If the module works for a long time, it is recommended not to exceed 10A.) ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B076Y9XT3L | | Additional Features | Fan Control | | Best Sellers Rank | #175,929 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #244 in Temperature Controllers | | Brand | LM YN | | Brand Name | LM YN | | Color | Green,red | | Control Method | Touch | | Control Type | Button Control | | Controller Type | Thermostat | | Customer Reviews | 4.3 out of 5 stars 20 Reviews | | Display Type | LED | | Included Components | Digital Thermostat Module | | Item Dimensions D x W x H | 0.63"D x 0.63"H | | Item Weight | 27.22 g | | Manufacturer | LM YN | | Manufacturer Part Number | DT-40932 | | Manufacturer Warranty Description | 1 year. | | Material Type | Metal | | Model Number | LMYNDT05 | | Mounting Type | Wall Mount | | Number of Items | 1 | | Number of Packs | 1 | | Power Source | Battery Powered | | Product Dimensions | 0.63"D x 0.63"H | | Product Style | Digital | | Screen Size | 46 millimeters | | Shape | Rectangular | | Special Feature | Fan Control | | Specific Uses For Product | Thermostat Control | | Temperature Control Type | Digital | | UPC | 612957708252 | | Unit Count | 1 Count | | Voltage | 125 volts | ## Images ![DC 5V Digital Thermostat Module -58℉ to 257℉ Fahrenheit Temp Display Temperature Controller Board with 20A Relay Waterproof Sensor Probe Dual LED Display Red Green - Image 1](https://m.media-amazon.com/images/I/81zmZPKmn9L.jpg) ![DC 5V Digital Thermostat Module -58℉ to 257℉ Fahrenheit Temp Display Temperature Controller Board with 20A Relay Waterproof Sensor Probe Dual LED Display Red Green - Image 2](https://m.media-amazon.com/images/I/81-Qqy8bG3L.jpg) ![DC 5V Digital Thermostat Module -58℉ to 257℉ Fahrenheit Temp Display Temperature Controller Board with 20A Relay Waterproof Sensor Probe Dual LED Display Red Green - Image 3](https://m.media-amazon.com/images/I/41-yIUz6-zL.jpg) ![DC 5V Digital Thermostat Module -58℉ to 257℉ Fahrenheit Temp Display Temperature Controller Board with 20A Relay Waterproof Sensor Probe Dual LED Display Red Green - Image 4](https://m.media-amazon.com/images/I/610JxXs1jRL.jpg) ![DC 5V Digital Thermostat Module -58℉ to 257℉ Fahrenheit Temp Display Temperature Controller Board with 20A Relay Waterproof Sensor Probe Dual LED Display Red Green - Image 5](https://m.media-amazon.com/images/I/71xxm8bdnxL.jpg) ## Questions & Answers **Q: just to be clear. This is designed to keep something at a certain temp? So the hot end i see heats up between the specific temps listed?** A: The silver probe tip is the temperature sensor itself. That's what detects the temperature of what ever you are monitoring. When it's above the High temp setting (red) the relay contacts K1 and K0 close so that would activate a fan or what ever you want to monitor. Depending on how you have it setup, if the temp gets below the Low (green) temp, then the relay contacts (K0/K1) open to shut off any cooling you might have running. **Q: Can the relay be driven by 5V DC?** A: As the description says, the board itself is driven by 5v which powers the relay. The ratings it lists is what the relay contact load can carry. **Q: If the board loses power for an extended time, do the settings reset?** A: The settings will be saved when the power off. **Q: Upon power up, is P0 set to cooling or heating?** A: First powered on, the device is cooling mode(can be changed). --- ## 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.sg/products/78308126-dc-5v-digital-thermostat-module-58-to-257-fahrenheit-temp](https://www.desertcart.sg/products/78308126-dc-5v-digital-thermostat-module-58-to-257-fahrenheit-temp) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-10-19*