From Makers Electronics's description
W1209 Temperature Control Switch Module: Precise Temperature Regulation for Various Applications W1209 is unlike any other digital temperature control switch. This product can measure from -50°C to 110°C. At the same time, it also has a high accuracy, When the temperature is 0.1, the resolution is -9.9~99.9, other temperature segments are 1, and there is an LCD screen to show you the information, really perfect to use, you will love it! How To Use: Connect the power supply and the load, you can supply to the controller. Is displayed as a measured temperature. Press the SET button, and the display flashes the temperature. Press – to set the desired temperature. After setting press SET to confirm return. The controller automatically performs the relay by setting off. Lights, LED status descriptions. Indicator: Off The relay is switched off, Always indicate the relay is closed. LED: Shows LL is the sensor open, showing?HH is out of range, the thermostat will be forced to close the relay. The display–as high-temperature protection. Specifications: Specification Value Supply Voltage 12V DC Temperature Control Range -50°C to +110°C Display Type 3-Digit Segment Display Control Buttons 3 Temperature Resolution 0.1°C (-9.9°C to +90°C), 1°C (Outside this range) Output Load (DC) 20A @ 14V DC Output Load (AC) 10A / 15A @ 250V AC Temperature Sensor Waterproof NTC 10K Probe Probe Cable Length 50 cm PCB Dimensions 50 × 40 × 15 mm Programming: MENU: to enter the programming mode, press and hold the SET button for approx. 5 s Selection of mode P0 – P6 by means of + and – buttons Entry into the selected mode by pressing the SET button Confirmation of the selected value by pressing the SET button Programming modes: P0: choice of cooling or heating, C/H P1: hysteresis setting, from 0.1°C to 15°C P2: upper temperature limit, 110 °C P3: Lower temperature limit, -50°C P4: Set temperature deviation, from -7°C to 7°C P5: Relay switching delay time, range 0 s to 10 s P6: Over temperature alarm, range 0°C to 110°C Thermostat with temperature sensor – a simple and intelligent addition to building installations: Ensuring the right temperature inside a building affects its comfort, regardless of the season and weather conditions outside. To maintain the room temperature at the required level in an unmanned manner, the heating, ventilation and air conditioning systems must be controlled by feedback. In such an application, the thermostat with a temperature sensor perfectly fulfills its role. Temperature control in real-time: The W1209 thermostat is equipped with a temperature sensor that measures temperature in real-time. The temperature is converted into a voltage signal – when the programmed threshold value is exceeded, the voltage is applied to the coil of the built-in relay. The output relay switches on and off the power supply to the ventilation, air-conditioning, and heating circuits, according to the programmed parameters of the thermostat. Applications: Incubators. Refrigerators and freezers. Aquariums. Greenhouses. Home automation. Battery charging temperature control. Cooling fan control. Heating systems. Industrial temperature monitoring. DIY electronics projects. Package Includes: 1 × W1209 Temperature Control Switch Module. 1 × Waterproof NTC Temperature Sensor.
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