Product Description
W1209 is an intelligent thermostat sensor module, which has an onboard microcontroller chip and does not require any programming to function. The W1209 comes with a high-precision NTC temperature sensor to sense the temperature around. The module has 3 tactile switches which help us customize the module’s parameters according to our needs.
Features and Specifications of W1209 Temperature Control Switch
This section mentions some of the features and specifications of the W1209 Thermostat sensor module.
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Temperature control range: -50 to 110 degree C
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Measurement accuracy: 0.1 Degree C
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Input Voltage: 12V DC
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Refresh rate: 0.5 Seconds
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Measurement inputs: NTC(10K 0.5%)
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Output: 1 Channel Relay Output 240V AC/ 12V DC
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Relay current Capacity: 10A
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Module current consumption; Static state = Less than 35mA, Max = less than 65mA
Pin Configuration of W1209 Temperature Control Switch
The W1209 Temperature control switch has few pins, the table below explains the ports and the function of each pin.
| Pin Type | Description |
| Sensor Input Connector(White) | Temperature sensor connect |
| Sensor Input Connector(White) | Temperature sensor connect |
| K0 | Relay contact 1 |
| K1 | Relay contact 2 |
| 12V | Input Voltage |
| GND | Ground |
Setting the parameters of the W1209 Temperature Control Switch
To set the different parameters of the module, long press the ‘Set’ button on the module and change the values using the ‘+’ and ‘-’ buttons.
| Settings | Parameter | Range | Default Value |
| H/C | P0 | H/C | Heat/Cold(Depends on the application) |
| Hysteresis set | P1 | 0.1-15 | 2 |
| Upper limit | P2 | 110 | 110 |
| Lower limit | P3 | -50 | -50 |
| Correction | P4 | -14 | 0 |
| Delay Start Time | P5 | 0-10 mins | 0 |
| High Temperature Alarm | P6 | 0-100 | OFF |
Note: Long pressing the +/- button will reset the values to default.
Applications of W1209 Temperature Control Switch
Here are some of the applications of the W1209 Thermostat sensor module.
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To control fan/heater/cooler wirelessly
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Preset or setpoint temperatures
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Central Heaters/Coolers
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Water Heaters
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Refrigerators
Actual image of the product
