The W1209 Digital Thermostat Temperature Module has a STM8S controller, a sensor input, keys, LED display, and a relay. It can be reprogrammed for control, timing, or counting.

Temperature Measurement Range: -50~110℃. Control Precision: 0.1 celsius

Electronic digital thermostat with a 3-digit LED display, extremely bright. Operation both in heating and cooling to easily control equipment and devices.

The output is electronically controlled by a microprocessor, to guarantee the utmost precision of intervention and an excellent resolution of reading temperature.

The NTC probe is waterproof and allows to control the temperature even of fluids, allowing the controlled heated or cooling.

​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 current temperature is displayed in degrees Centigrade via its 3 digit seven segment display and the current relay state by an on board LED.

Settings Chart:

Long press the “SET” button to activate the menu

(SET THE VALUES AS MENTIONED IN BRACKET)
Code Description Range Default Value
P0 Heat C/H (C)
P1 Backlash Set 0.1-15  (2)
P2 Upper Limit 110 (110)
P3 Lower Limit -39 (-39)
P4 Correction -7.0 ~ (0)
P5 Delay Start Time 0-10 mins  (0)
P6 High-Temperature Alarm 0-110  (OFF)
Long pressing “+/-” will reset all values to their default

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Package Includes : 

1 x W1209 Digital Thermostat Temperature Module

1 x NTC Probe