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STC3028 STC-3028 Thermostat Digital Temperature and Humidity Controller 12V

K-TECHNICS
In stock
KSh2,500.00

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The STC-3028 (12V DC variant) is an all-in-one digital controller that simultaneously monitors and regulates both temperature and humidity. It features dual independent relay outputs, making it ideal for egg incubators, greenhouses, reptile enclosures, and DIY environmental control systems.
Technical Specifications
  • Power Supply: 12V DC
  • Relay Output Capacity: Max 10A per channel
  • Temperature Range: -20°C to +80°C
  • Humidity Range: 0% RH to 100% RH
  • Measurement Accuracy: ±1°C and ±0.1% RH
  • Housing Material: Flame-retardant ABS plastic
  • Mounting Cutout: 71mm x 29mm
Pinout and Wiring Diagram
The back panel features 8 screw terminals:
Terminal Pins Function Connection Details
Pins 1 & 2 Power Input Connect your 12V DC Power Supply (Pin 1: Negative / Pin 2: Positive)
Pins 3, 4, 5 Sensor Inputs Factory pre-wired to the combined SHT20 Waterproof Sensor
Pins 6 & 7 Temperature Relay Acts as a switch for your Heater or Cooling Fan (Max 10A)
Pins 8 & 9 Humidity Relay Acts as a switch for your Humidifier or Dehumidifier (Max 10A)
Note: The relay pins (6/7 and 8/9) are dry contacts and do not output power. You must route power through them to run your loads.
Key Operation and Programming
The display features four buttons divided into two groups:
  • Group 1 (Left): Temperature buttons ▲1 (Up) and ▼1 (Down).
  • Group 2 (Right): Humidity buttons ▲2 (Up) and ▼2 (Down).
1. Checking Your Targets
  • Press ▲1 or ▲2 once to view the Start values.
  • Press ▼1 or ▼2 once to view the Stop values.
2. Modifying Settings
  1. Long-press any arrow button for 3 seconds until the screen flashes.
  2. Use the Up and Down buttons to adjust your value.
  3. Wait 5 seconds without pressing anything to automatically save the parameters.
3. Determining the Mode (Heating vs. Cooling)
The controller figures out what mode to run automatically based on your target numbers:
  • Heating Mode: Set the Start Temp lower than the Stop Temp. (Example: Start at 37.0°C / Stop at 37.8°C).
  • Cooling Mode: Set the Start Temp higher than the Stop Temp. (Example: Start at 30.0°C / Stop at 25.0°C).
  • Humidifying Mode: Set the Start Humidity lower than the Stop Humidity.
  • Dehumidifying Mode: Set the Start Humidity higher than the Stop Humidity.
4. Sensor Calibration
If your readings are slightly off from a calibrated reference tool, you can apply an offset:
  • Temperature Calibration: Hold ▲1 and ▼1 simultaneously for 2 seconds to adjust the temperature offset.
  • Humidity Calibration: Hold ▲2 and ▼2 simultaneously for 2 seconds to adjust the humidity offset.

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Please note, a delivery fee of €4.99 applies for orders under €50. For those in remote areas, be aware that our couriers may apply an extra surcharge. This additional fee helps cover the costs of transporting your items to harder-to-reach locations.