{"product_id":"w1219-digital-temperature-controller-module-with-ds18b20-sensor","title":"W1219 Digital Temperature Controller Module with DS18B20 Sensor","description":"\u003ch1\u003eW1219 Temperature Controller Module with Waterproof Sensor – 12V Digital Thermostat\u003c\/h1\u003e\u003cp\u003eThe W1219 is a compact digital temperature controller module designed for precise temperature regulation in hobbyist and industrial applications. It includes a waterproof DS18B20 probe sensor and a built-in relay, allowing you to switch heating or cooling devices based on user-set thresholds. The bright red LED display shows real-time temperature and setpoints, making it ideal for incubators, fermentation chambers, and aquarium systems.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e12V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-55°C to +110°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensor Type\u003c\/td\u003e\n\u003ctd\u003eDS18B20 Waterproof Probe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Accuracy\u003c\/td\u003e\n\u003ctd\u003e±0.1°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelay Rating\u003c\/td\u003e\n\u003ctd\u003e10A @ 250V AC \/ 10A @ 30V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003e3-digit Red LED\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEgg incubator with automatic temperature regulation\u003c\/li\u003e\n\u003cli\u003eAquarium heater controller for tropical fish\u003c\/li\u003e\n\u003cli\u003eFermentation chamber for yogurt or kombucha\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-server-room-temperature-monitor-kit-v4\"\u003eServer room cooling fan trigger based on ambient temperature\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThis module operates independently without a microcontroller, but it can be integrated into larger systems. The relay output can connect directly to Arduino or Raspberry Pi GPIO via an external driver if you wish to monitor or override control. It works with any load within the relay rating and is commonly paired with 12V heating pads or fans.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect 12V DC to the power input terminals (observe polarity). The DS18B20 sensor plugs into the dedicated 3-pin connector—no additional pull-up resistor is needed. The relay provides normally open (NO) and common (COM) screw terminals; wire your load in series with these contacts and ensure current does not exceed 10A.\u003c\/p\u003e\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, you can read the DS18B20 sensor data with an Arduino using the OneWire library, and the relay can be used to switch Arduino-controlled devices if isolated properly.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan the sensor cable be extended?\u003c\/summary\u003e\u003cp\u003eThe waterproof probe comes with a 1-meter cable. You can extend it using a 3-wire connection, but keep total length under 10 meters to avoid signal degradation.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes it remember settings after power off?\u003c\/summary\u003e\u003cp\u003eYes, the W1219 stores the setpoint temperature and hysteresis in non-volatile memory, so settings persist after a power cycle.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444959109485,"sku":"CDN-0332","price":210.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_6529b094-6c72-4e8d-968c-cc3c5d16901e.jpg?v=1781512466","url":"https:\/\/compoden.com\/products\/w1219-digital-temperature-controller-module-with-ds18b20-sensor","provider":"Compoden","version":"1.0","type":"link"}