✍ The W1209 is a low-cost yet highly functional thermostat controller. This module intelligently controls power to most types of electrical devices based on the temperature sensed by the included high-accuracy NTC remote temperature sensor.

The cooler, heater, or fan is connected to a power supply through the relay contacts K0 and K1, and the temperature on/off setpoints are programmed into the W1209 using the onboard Set, Increase, and Decrease buttons and display. The relay contacts are then open and closed, acting as a power switch for the cooler/heater, based on the temperature measured by the NTC temperature sensor (included with the module) and the setpoints programmed into the W1209 controller. 3 switches are used to configure the parameters including on & off trigger temperatures.

The temperature is displayed in degrees Centigrade via its 3-digit display and the current relay state by an onboard LED.

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▼ Specifications:
● Temperature Control Detect Range: -50° ~ 110°C
● Resolution at -9.9°to 99.9°: 0.1°C
● Resolution at all other temperatures: 1°C
● Measurement Accuracy: 0.1°C
● Control Accuracy: 0.1°C
● Refresh Rate: 0.5 Seconds
● Input Support Power (DC): 6V - 12V
● Measuring Input: NTC (10K 0.5%)
● Waterproof Sensor: 0.5M cable

Power Consumption:
● Static Current: ~35mA
● Maximum Current: ~65mA

Control Board Environmental Requirements:
● Temperature: -10° ~ 60°C
● Humidity: 20-85%

Dimensions:
● 48mm x 40mm x 14mm (LxWxH)

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▼ Instructions for use:
Connect the power supply and equipment, the measuring temperature is displayed,
press the "SET" button, press " + or - " to set the desired temperature (long press " + or - " to quickly increase or decrease),
press "SET" to confirm the setting and return, controller automatically performs the relay ON/OFF.

▼ On-board LED Indicator:
LED off = relay off

▼ Display:
LL = Sensor open
HH = Relay disconnected
- - - = High-temperature alarm

Long press the "SET" button to enter the main menu settings, press " + or - " to switching between P0 - P6
Long press "SET" or 10 seconds without any key to confirm the setting and return.

▼ Buttons:
P0 :Cooling / Heating; Range: C/H; Default: C
P1 :Hysteresis Setting; Range:0.1-15; Default: 2
P2 :Highest Setting Limit; Range:110; Default: 110
P3: Lowest setting Limit; Range:-50; Default: -50
P4 :Temperature Correction; Range:-7-7°c; Default: 0°c
P5: Delay Start Time; Range:0-10 Minute; Default: 0
P6: Key Tone Switch; Range:0-110; Default: Off
When the Thermostat is power off, long press "- or +", you can restore the factory settings