STC-3028 Digital Temperature Humidity Controller 110-220V

STC-3028 Digital Temperature & Humidity Controller (110220V)

What is it?

The STC-3028 Temperature Humidity Controller is a plug-and-play controller used to automatically regulate temperature and humidity using external devices like heaters, coolers, humidifiers, and dehumidifiers.

It's widely used in environments where precise climate control is needed.

How It Works

The controller uses:

• A temperature sensor probe

• A humidity sensor probe

Working logic:

• You set desired temperature & humidity ranges

• Device continuously measures current values

• If values go beyond set limits:

  • It activates relays

  • Turns ON/OFF connected applul

  • Temp too low Heater ON

  • Humidity too high Dehumidifier ON

   

  Input & Output

  Power Supply:

  • 110220V AC (direct mains input)

  Outputs (via relays):

  • Temperature control socket

  • Humidity control socket

   

  Each output acts like an automatic switch.

  Typical Socket Layout

  • Power input (plug to mains)

  • 2 output sockets:

    • Temperature device (heater/cooler)

    • Humidity device (humidifier/dehumidifier)

     

   

  Key Features

  • Dual display (temperature + humidity)

  • Independent control for both parameters

  • High/Low setpoint configuration

  • Plug-and-play (no coding required)

    • Temperature range: -50C to +99C

    • Humidity range: 1% to 99% RH

    • Accuracy:

      • Temperature: 1C

      • Humidity: 5% RH

       

    • Control outputs: Relay-based

    • Voltage: 110220V AC

     

    Control Modes

    Temperature Control

    • Set:

      • Target temperature

      • Heating or cooling mode

       

    Humidity Control

    • Set:

      • Target humidity

      • Humidifying or dehumidifying mode

       

    Working Example

    Let's say:

    • Temp set = 25C

    • Humidity set = 60%

     

    System behavior:

    • Temp < 25C Heater ON

    • Temp > 25C

     

    Applications

    • Incubators

    • Greenhouses

    • Aquariums

    • HVAC systems

    • Mushroom cultivation

    • Laboratories

     

    Advantages

    • No programming required

    • Controls both temperature & humidity

    • Works directly with AC appliances

    • Easy installation

    • Cost-effective automation

     

    Limitations

    • Limited precision compared to industrial controllers

    • Relay switching delay

    • Not suitable for very high-power industrial loads without external relays

    • Basic interface (no advanced logging or IoT)

     

    Safety Tips

    • Works on high volt

      Do not overload sockets

    • Use proper rated appliances

    Real-Life Use Case

    In a greenhouse:

    • Controller monitors environment

    • Automatically:

      • Turns ON heater at night

      • Activates humidifier during dry conditions Maintains ideal plant growth conditions without manual effort