W1209 Digital Temperature Controller
₨ 290
12 V thermostat board with a 3-digit display and relay output, for heating or cooling control from -50 to 110 °C using a 10 kΩ NTC sensor.
Overview
The W1209 is a ready-to-use thermostat board. Set a target temperature with the three buttons, and the onboard relay switches a heater or a cooling fan on and off to hold it. No programming is needed.
The 3-digit LED display shows the measured temperature, and an LED shows the relay state. The settings menu covers heating or cooling mode, hysteresis, upper and lower setpoint limits, calibration offset, start delay and a high-temperature alarm.
Key Features
- -50 to 110 °C control range
- 0.1 °C resolution between -9.9 and 99.9 °C
- Heating (H) or cooling (C) mode
- Adjustable hysteresis, limits, calibration and start delay
- Runs from a 12 V DC supply
Typical Applications
- Egg incubators and brooders
- Fermentation and yoghurt boxes
- Aquarium heaters and terrarium control
- Cabinet, enclosure and battery-box cooling fans
Compatibility
Uses a 10 kΩ NTC thermistor probe of the type made for the W1209. Powered from a 12 V DC adapter or battery.
Important Notes / Safety
- Check the relay rating printed on the board before connecting a load, and use a contactor or external relay for heaters and compressors above that rating.
- Keep mains wiring isolated and enclosed, and fuse the load circuit.
- Use the start-delay setting when controlling compressors to avoid rapid restarts.
| Supply voltage | 12 V DC |
|---|---|
| Control range | -50 to 110 °C |
| Resolution | 0.1 °C (between -9.9 and 99.9 °C), 1 °C elsewhere |
| Sensor input | 10 kΩ NTC thermistor |
| Output | 1 relay |
| Display | 3-digit LED |
| Modes | heating (H) or cooling (C) |
| Adjustable | hysteresis, upper/lower limit, calibration, start delay, high-temperature alarm |
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