10A 220V Mini Digital Air Humidity Controller

🔍 What this device is
The 10A 220V Mini Digital Air Humidity Controller is a standalone automation controller that:
Measures humidity (RH%)
Automatically turns ON/OFF devices like:
Humidifier 💧
Dehumidifier 🌬️
Fan 🌀
👉 It works like a thermostat, but for humidity
🧠 Core Concept (VERY IMPORTANT)
You set a target humidity range, for example:
ON at 40% RH
OFF at 60% RH
👉 Then the controller:
Turns ON device when humidity is low/high
Turns OFF when desired level is reached
➡️ Fully automatic control
⚙️ Key Specifications
Operating Voltage: 220V AC
Relay Capacity: 10A (≈2200W max load)
Humidity Range: 1% – 99% RH
Accuracy: ±3% RH
Control Precision: 1% RH
Display: LED digital display
Sensor: External humidity probe
⚡ How it works
Sensor measures humidity
Controller compares with set value
Relay switches device ON/OFF
👉 Example:
If humidity < set → humidifier ON
If humidity > set → OFF
➡️ Same for dehumidification mode
🔌 Wiring (IMPORTANT)
Typical terminals:
Power Input (L, N) → 220V AC
Relay Output (COM, NO/NC) → Load (fan/humidifier)
Sensor Port → Humidity probe
⚠️ This is high voltage (220V) → handle carefully
💡 Applications
🌱 Greenhouses
🐣 Incubators (egg hatching)
🏠 Room humidity control
🧊 Refrigerators / cold storage
🏭 Industrial humidity control
📦 Storage rooms
➡️ Very useful for automation without microcontroller
🧠 Key Features
✔️ Fully automatic control
✔️ Built-in relay (no external relay needed)
✔️ Memory backup (retains settings after power loss)
✔️ Adjustable upper & lower limits
✔️ Easy button interface
⚠️ Important Notes (VERY IMPORTANT)
❗ 1. High voltage device
Works directly on 220V AC
⚠️ Risk of electric shock
👉 Always:
Use proper insulation
Avoid touching terminals
❗ 2. Not a sensor module
👉 This is NOT like Arduino sensors
👉 It is a complete controller system
❗ 3. Limited accuracy
±3% RH typical
👉 Not for scientific use
❗ 4. Relay limit
Max load ≈ 10A
👉 Don’t connect heavy industrial loads directly
🆚 Controller vs Sensor Module
Feature
Humidity Controller
SHT41 / SGP40
Type
Complete system
Sensor only
Output
Relay ON/OFF
Data (I2C)
Coding
❌ Not needed
✅ Required
Use
Automation
Measurement
👍 When to use this
Use this if you want:
Plug-and-play humidity control
No coding required
Direct control of AC devices
👎 When NOT to use
Avoid if:
You want IoT/data logging
You need high precision
You are building Arduino projects
🧠 Final Understanding
👉 This device = “automatic humidity switch (like thermostat)”
👉 Best for direct control systems, not data-based projects