W1209 Temperature Control Module

  • Power Supply: 12V DC
  • Temperature Measurement Range: –50°C to +110°C
  • Temperature Control Accuracy: ±0.1°C
  • Temperature Sensor: NTC 10K Thermistor (waterproof probe)
  • Output Type: Relay Output (NO)
  • Relay Contact Capacity: 20A @ 14V DC / 125V AC (varies by manufacturer)
  • Display: 3-digit 7-segment LED display
  • Control Mode: Heating or Cooling
  • Operating Humidity: 20%–85% RH
  • Module Size: Approximately 48 × 40 mm
Description
  • The W1209 is a compact, low-cost temperature controller module commonly used in DIY and industrial applications for regulating temperature within a predefined range.
  • It features an NTC 10K waterproof temperature probe that provides fast and accurate temperature readings.
  • The module includes a high-current relay that can switch heating or cooling devices directly, such as heaters, fans, refrigerators, incubators, or water pumps.
  • Users can easily configure temperature setpoints, hysteresis, high/low temperature limits, and calibration using three onboard push buttons.
  • The bright LED display shows real-time temperature and menu parameters, making setup and monitoring simple.
  • The controller supports both heating mode (relay activates when temperature drops below setpoint) and cooling mode (relay activates when temperature rises above setpoint).
  • Ideal for thermostats, incubators, pet habitats, aquariums, fermentation systems, and general temperature regulation tasks.

PACKAGE INCLUDES:
  • 1 × W1209 Temperature Control Module
  • 1 × NTC 10K Waterproof Temperature Probe
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Applications
  • Thermostats
  • Incubators
  • Aquariums
  • Greenhouse temperature management
  • Fermenters and brewing systems
  • Pet enclosures and reptile habitats
  • Cooling fans
  • Room heaters
  • Water tank temperature control
  • Small-scale HVAC systems
TECHNICAL SPECIFICATIONS
Parameter Value
Operating Voltage 12V DC
Temperature Range –50°C to +110°C
Measurement Accuracy ±0.1°C
Relay Capacity 20A @ 14V DC / 125V AC
Sensor Type NTC 10K Waterproof
Display 3-digit LED
Control Modes Heating / Cooling
Dimensions 48 × 40 mm
Operating Humidity 20% – 85% RH