3 Review(s)

The W1209 is an incredibly low cost yet highly functional thermostat controller. With this module, you can intelligently control power to most types of electrical device based on the temperature sensed by the included high accuracy NTC temperature sensor. Although this module has an embedded microcontroller no programming knowledge is required. 3 tactile switches allow for configuring various parameters including on & off trigger temperatures. The onboard relay can switch up to a maximum of 240V AC at 5A or 14V DC at 10A. The current temperature is displayed in degrees Centigrade via its 3 digit seven segment display and the current relay state by an on-board LED. Application method: When the power supply and equipment are connected, power can be supplied to the controller. At this time, it is displayed as measuring temperature. Press SET key once, and the display temperature flashes. The output of the thermostat is 20A relay, which meets various high-power loads. When the control circuit is connected, power can be supplied to the thermostat. At this time, the display shows the ambient temperature. Indicator light, digital tube and buzzer status description: Indicator light: flicker indicates start delay of refrigeration or heating, and constant light means the relay is closed. Digital tube: display LL opens the way for the sensor, please connect the sensor according to the instructions; It is shown that HH is beyond the measuring range and the thermostat will forcibly disconnect the relay. Display -- -- alarm for high temperature. Package Includes: 3 x W1209 Digital Temperature Controller