--- product_id: 64183949 title: "HiLetgo 2pcs W1209 12V DC Digital Temperature Controller Board Micro Digital Thermostat -50-110°C Electronic Temperature Temp Control Module Switch with 10A One-channel Relay and Waterproof" brand: "hiletgo" price: "0 zł" currency: PLN in_stock: true reviews_count: 13 url: https://www.desertcart.pl/products/64183949-hiletgo-2pcs-w1209-12v-dc-digital-temperature-controller-board-micro store_origin: PL region: Poland --- # Waterproof NTC sensor included Low power MCU with EEPROM memory ±0.1°C precision control HiLetgo 2pcs W1209 12V DC Digital Temperature Controller Board Micro Digital Thermostat -50-110°C Electronic Temperature Temp Control Module Switch with 10A One-channel Relay and Waterproof **Brand:** hiletgo **Price:** 0 zł **Availability:** ✅ In Stock ## Summary > 🌟 Master your climate with precision and power — because your projects deserve nothing less! ## Quick Answers - **What is this?** HiLetgo 2pcs W1209 12V DC Digital Temperature Controller Board Micro Digital Thermostat -50-110°C Electronic Temperature Temp Control Module Switch with 10A One-channel Relay and Waterproof by hiletgo - **How much does it cost?** 0 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/64183949-hiletgo-2pcs-w1209-12v-dc-digital-temperature-controller-board-micro) ## 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 Power Memory:** Never lose your settings—built-in EEPROM remembers your preferences even after power outages. - • **Robust 10A Relay Output:** Handles high-power loads effortlessly, perfect for demanding professional setups. - • **Durable & Reliable Build:** Wave soldered, tested for stability and consistency—engineered to perform under pressure. - • **Pinpoint Temperature Accuracy:** Control your environment with razor-sharp ±0.1°C precision for flawless results every time. - • **User-Friendly Digital Interface:** Intuitive LED display and easy menu navigation keep you in full control without hassle. ## Overview The HiLetgo W1209 Digital Temperature Controller is a compact, 12V DC thermostat module featuring ultra-precise ±0.1°C control, a smart MCU with EEPROM memory for power outage resilience, and a waterproof NTC sensor. Its 10A relay supports high-power devices, while the user-friendly LED interface ensures seamless operation. Designed for stability and reliability, this controller is ideal for professionals demanding consistent temperature management in diverse environments. ## Description Specifications: Model: W1209 Dimensions: 48.5 * 40mm Temperature Control mode: ON / OFF Temperature Range :-50 - 110 degree centigrade Resolution: When temperature is 0.1 degree, the resolution is -9.9~99.9, other temperature segment is 1 degree. Control Accuracy: 0.1 degree Hysteresis Accuracy: 0.1 degree Refresh Rate: 0.5s High Temperature Protection 0 - 110 degree centigrade Supply Voltage: DC 12V Static Current: Less than 35MA, attract current less than 65MA Output Voltage: DC 12V Output Power: 20A relay Measurement Input: NTC (10K 0.5%) Waterproof Sensor Environmental Requirements: -10 - 60 degree centigrade; Humidity 20% - 85% Instructions for use: Connect the power supply and equipment, the measuring temperature is displayed, press the "SET" button, press " + or - " to set the desired temperature (long press " + or - " to quickly increase or decrease), press "SET" to confirm the setting and return, controller automatically performs the relay ON/OFF. the thermostat output is 10A relay, meet a variety of high-power loads. LED Indicator: LED off indicates the relay off; Lighting, indicates the relay is closed. Digital LED Tubes: "LL" indicates sensor open, "HH" indicates overrange, the relay will be forcibly disconnected; "---" indicates high temperature alarm Long press the "SET" button to enter the main menu settings, press " + or - " to switching between P0-P6, then long press "SET" or 10 seconds without keystrokes to confirm the setting and return. Package Included: 2*W1209 12V DC Digital Temperature Controller Board ## Features - 100% complete machine patch, wave soldering, stable performance, good consistency. - Embedded CPU chip (MCU), more intelligent, lower power consumption. - Automatic power set memory (MCU built-in EEPROM memory unit). - Control accuracy of 0.1 degrees Celsius. Have been tested for stability, consistency and reliability. - Tips: - long press set to get menu, starts at P0 - press +/- to get next P-parameter - press set to choose that parameter - press +/- to select the value you want for that parameter - press set to accept it - long press +/- = reset to default - power-out does reset to default - default temp set is 34.5C ## Technical Specifications | Specification | Value | |---------------|-------| | Product Dimensions | 4.8 x 4 x 1.4 cm; 40 g | | Batteries required | No | ## Product Details - **Colour:** NO Case - **Brand:** HiLetgo - **Voltage:** 12 Volts - **Display type:** LED - **Manufacturer:** HiLetgo ## Images ![HiLetgo 2pcs W1209 12V DC Digital Temperature Controller Board Micro Digital Thermostat -50-110°C Electronic Temperature Temp Control Module Switch with 10A One-channel Relay and Waterproof - Image 1](https://m.media-amazon.com/images/I/71DLrkx-nML.jpg) ![HiLetgo 2pcs W1209 12V DC Digital Temperature Controller Board Micro Digital Thermostat -50-110°C Electronic Temperature Temp Control Module Switch with 10A One-channel Relay and Waterproof - Image 2](https://m.media-amazon.com/images/I/7156jBlJqKL.jpg) ![HiLetgo 2pcs W1209 12V DC Digital Temperature Controller Board Micro Digital Thermostat -50-110°C Electronic Temperature Temp Control Module Switch with 10A One-channel Relay and Waterproof - Image 3](https://m.media-amazon.com/images/I/51sg4qKGLbL.jpg) ![HiLetgo 2pcs W1209 12V DC Digital Temperature Controller Board Micro Digital Thermostat -50-110°C Electronic Temperature Temp Control Module Switch with 10A One-channel Relay and Waterproof - Image 4](https://m.media-amazon.com/images/I/61oyXBWvgPL.jpg) ![HiLetgo 2pcs W1209 12V DC Digital Temperature Controller Board Micro Digital Thermostat -50-110°C Electronic Temperature Temp Control Module Switch with 10A One-channel Relay and Waterproof - Image 5](https://m.media-amazon.com/images/I/5170PxaXGzL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars Works as expected *by A***R on Reviewed in the United Kingdom on 18 May 2019* Bought these (only in fact needed one) to control solar powered ventilation fans in my greenhouse. Can be configured to operate in cooling (on when set temperature exceeded) or heating (on when below set temperature). There's a couple of degrees hysteresis so it won't oscillate too much. The LEDs show the current temperature and it seems fairly accurate. The temperature probe supplied has a reasonably long lead and is potted into a metal cap, making it waterproof (the board itself will of course need protecting in a box).Configuration is simple, albeit a bit tricky to figure at the start I found. It essentially comes down to up and down buttons to set the trigger temperature. The settings are non-volatile so survive power loss.Was a bit concerned about the current drain given I'm using it in a solar/battery environment. However, even though it has pretty bright LEDs they have minimal drain on my small Li-Ion pack (not enough to discharge it over night anyway). ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars Small and compact with good settings *by R***Y on Reviewed in the United Kingdom on 11 March 2019* Really small board all that’s missing is some clear instructions, connected it up to turn a cooling fan on in my av cabinet and 2 days in it seems okay ### ⭐⭐⭐⭐ 4.0 out of 5 stars Temperature switch *by S***S on Reviewed in the United Kingdom on 12 September 2018* Am using them to operate cooling fans so only light load but they work well and have many settings ## Frequently Bought Together - HiLetgo 2pcs W1209 12V DC Digital Temperature Controller Board Micro Digital Thermostat -50-110°C Electronic Temperature Temp Control Module Switch with 10A One-Channel Relay and Waterproof - KEYFANCLUB 2-Pack 120mm Fan DC 12V Computer Fan 120mm x120mm x 25mm 2-Pin High Performance Cooling Fan --- ## 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.pl/products/64183949-hiletgo-2pcs-w1209-12v-dc-digital-temperature-controller-board-micro](https://www.desertcart.pl/products/64183949-hiletgo-2pcs-w1209-12v-dc-digital-temperature-controller-board-micro) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-05-23*