--- product_id: 418386807 title: "DC 12V Digital Thermostat Module -58℉ to 257℉ Fahrenheit Temp Display Temperature Controller Board with 20A Relay Waterproof Sensor Probe Dual LED Display Red Blue" brand: "lm yn" price: "VT15540" currency: VUV in_stock: true url: https://www.desertcart.vu/products/418386807-dc-12v-digital-thermostat-module-58-to-257-fahrenheit-temp store_origin: VU region: Vanuatu --- # 20A high-load relay capacity Wide -58℉ to 257℉ range Dual Red + Blue LED display DC 12V Digital Thermostat Module -58℉ to 257℉ Fahrenheit Temp Display Temperature Controller Board with 20A Relay Waterproof Sensor Probe Dual LED Display Red Blue **Brand:** lm yn **Price:** VT15540 **Availability:** ✅ In Stock ## Summary > 🌡️ Stay Cool, Stay Precise — Control Your Climate Like a Pro! ## Quick Answers - **What is this?** DC 12V Digital Thermostat Module -58℉ to 257℉ Fahrenheit Temp Display Temperature Controller Board with 20A Relay Waterproof Sensor Probe Dual LED Display Red Blue by lm yn - **How much does it cost?** VT15540 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/418386807-dc-12v-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 Refresh Rate:** Updates every 0.5 seconds so you never miss a beat in temperature changes. - • **Dual-Color Clarity:** Red and blue LED displays ensure instant, clear temperature readings day or night. - • **Powerful & Reliable:** Robust 20A relay supports heavy-duty applications without breaking a sweat. - • **Waterproof Sensor Included:** 1-meter NTC metal probe built to withstand moisture and deliver consistent accuracy. - • **Precision at Your Fingertips:** Ultra-sensitive sensor with 0.1℉ resolution for exact temperature control. ## Overview The LM YN DC 12V Digital Thermostat Module offers professional-grade temperature control from -58℉ to 257℉ with dual red and blue LED displays for easy monitoring. Featuring a waterproof 1-meter NTC sensor and a powerful 20A relay, it delivers precise, fast updates every 0.5 seconds, making it ideal for any environment requiring reliable temperature management. ## Description Product Name: High-precision Digital Temperature Control Device. Dual LED display. The display font color: Red + Blue. 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 12V. 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: 1pcs Digital Thermostat Module ## Features - Upgrade Models. Digital display is modified to Fahrenheit temperature display (old section is Celsius display). Dual LED display, Red + Blue, Precise temperature control, high sensitivity, suitable for any occasion required temperature. - 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 12V. - 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.).LM YN Digital Thermostat Module User Manual !AlzQUCOyZQhKgXZs1xcmusRjKnzRe=hDDYS4 ## Technical Specifications | Specification | Value | |---------------|-------| | Item weight | 30 Grams | | Display type | LED | | UPC | 612957708276 | | Manufacturer | LM YN | | Product Dimensions | 4.6 x 4 x 1.6 cm; 30 g | | Material type | Metal | | Power source type | Corded Electric | | ASIN | B076Y5BXD9 | ## Product Details - **Colour:** Red Blue - **Brand:** LM YN - **Voltage:** 12 Volts - **Product dimensions:** 46L x 40W x 16H millimeters - **Material:** Metal ## Images ![DC 12V Digital Thermostat Module -58℉ to 257℉ Fahrenheit Temp Display Temperature Controller Board with 20A Relay Waterproof Sensor Probe Dual LED Display Red Blue - Image 1](https://m.media-amazon.com/images/I/81fC6in0d2L.jpg) ## Questions & Answers **Q: Can i set the hysteresis to .5°f? I am trying to make my incubator easier to use and this might be the ticket if I can can set it to hold tight temper** A: I haven't tried it but the P1 setting allows for hysteresis settings. I use 2 degrees, but it might be possible to refine it. **Q: Can the length of the wire for the temperature sensor be extended?** A: I haven't tried it, but the sensing current is so low that doubling or tripling the length would not affect it noticeably. **Q: 120v AC input 120v AC output?** A: This requires Input Power: DC 12V to runt the electronics but it can "switch AC or DC. And yes it can switch 120AC. The unit is controlling a relay. **Q: Im doing a car audio amp rack with a fan will this control the fan and come on when amp gets hot then shut off when cooled?** A: According to your description, it can work. Connect the cooling fan and the power supply for the fan between K0 and K1. Connect VCC and GND to DC12V to supply power to the module. Place the temperature control probe in the place where the temperature needs to be measured and set the temperature. You can check the user manual first to learn more about it. LM YN Digital Thermostat Module User Manual Download Link: https://www.amazon.com/clouddrive/share/2erQJUA07h19hgz1mIik6kOeJZWPSZkNSfBaZtjWFaJ ## Frequently Bought Together - LM YN DC 12V Digital Thermostat Module -58℉ to 257℉ Fahrenheit Temp Display Temperature Controller Board with 20A Relay Waterproof Sensor Probe Dual LED Display Red Blue - KEYFANCLUB 2-Pack 120mm Fan DC 12V Computer Fan 120mm x120mm x 25mm 2-Pin High Performance Cooling Fan - Blue Sea Systems 5064 In-Line ATO/ATC Fuse Holder --- ## 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.vu/products/418386807-dc-12v-digital-thermostat-module-58-to-257-fahrenheit-temp](https://www.desertcart.vu/products/418386807-dc-12v-digital-thermostat-module-58-to-257-fahrenheit-temp) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-06-05*