STC-3028 Digital Temperature Humidity Controller 110-220V

🌡️ STC-3028 Digital Temperature & Humidity Controller (110–220V)
🧠 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 appliances
👉 Example:
Temp too low → Heater ON
Humidity too high → Dehumidifier ON
🔌 Input & Output
Power Supply:
110–220V 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)
Built-in relays for automation
📊 Specifications
Temperature range: -50°C to +99°C
Humidity range: 1% to 99% RH
Accuracy:
Temperature: ±1°C
Humidity: ±5% RH
Control outputs: Relay-based
Voltage: 110–220V 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 = 25°C
Humidity set = 60%
👉 System behavior:
Temp < 25°C → Heater ON
Temp > 25°C → Cooler ON
Humidity < 60% → Humidifier ON
Humidity > 60% → Dehumidifier ON
🚀 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 voltage (AC mains) → handle carefully
Ensure proper earthing
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