XH-W1219 Dual Display Digital Thermostat Temperature Controller Module

The XH-W1219 is a dual-display digital thermostat module designed for accurate temperature monitoring and automatic relay control in heating and cooling systems. Unlike single-display controllers, it shows the current temperature and the trigger setpoint simultaneously on two separate three-digit LED displays, making parameter adjustments faster and less error-prone. The module operates on 12V DC and uses a waterproof NTC10K thermistor probe to measure temperatures across a wide control range of -50°C to 110°C with 0.1°C resolution. A built-in STM8S microcontroller manages the relay output, which is rated for loads up to 10A, allowing direct switching of heaters, fans, and small compressors. Users can configure heating or cooling mode, hysteresis (return difference), temperature calibration, delay start, and high-temperature alarm through three front-panel buttons, and all settings are retained in non-volatile memory during power interruptions. This 12V temperature controller is well suited to incubators, fermentation chambers, terrariums, and DIY climate-control projects where reliable dual-display monitoring is beneficial. The board measures approximately 60 × 43 mm and includes a 0.5-meter waterproof sensor cable.