XH-W3002 Intelligent Led Digital Microcomputer Temperature Controller
🌡️ XH-W3002 Intelligent LED Digital Temperature Controller
Mini Thermostat Switch • High-Power Temperature Control • Waterproof Probe
The XH‑W3002 Digital Temperature Controller is a compact microcomputer-based thermostat module designed to automatically control heating or cooling devices based on temperature. It includes a water-resistant temperature probe, LED display, and relay output capable of controlling loads up to 10A.
This controller is widely used in incubators, aquariums, refrigerators, greenhouses, and DIY temperature control systems.
📊 Infographic Overview
🔹 Basic Specifications
| Feature | Details |
|---|---|
| 🌡 Temperature Range | -50°C to 110°C |
| 🔌 Input Voltage | 12V / 24V / 220V (model dependent) |
| ⚡ Maximum Load | 10A |
| 📟 Display | LED Digital Display |
| 🌊 Sensor Type | Waterproof NTC Probe |
| 🔧 Control Mode | Heating or Cooling |
🧩 Main Components
| Component | Description |
|---|---|
| 📟 LED Digital Display | Shows real-time temperature |
| 🌡 NTC Temperature Probe | Detects temperature changes |
| ⚙ Microcontroller Circuit | Processes temperature data |
| 🔌 Relay Output | Controls external devices |
| 🎛 Control Buttons | Used for setting temperature limits |
🔌 Wiring / Terminal Configuration
| Terminal | Function |
|---|---|
| VCC / Power Input | Power supply to the module |
| GND / Neutral | Ground or neutral line |
| Relay Output (NO/COM) | Connects heating or cooling device |
| Sensor Probe | Temperature detection input |
⚙️ Working Principle
The controller maintains a set temperature using automatic switching control.
Step-by-Step Operation
1️⃣ The temperature probe measures ambient temperature.
2️⃣ The internal microcontroller compares it with the preset temperature value.
3️⃣ If temperature rises or drops beyond the set threshold:
The relay switches ON or OFF.
4️⃣ The connected device (heater or cooler) adjusts the temperature automatically.
📐 Temperature Control Diagram
Temperature Probe
│
▼
Microcontroller Unit
│
▼
Relay Switch
(10A Output)
│
▼
Heater / Cooler Device
🧰 Common Applications
🐣 Egg incubators
🐠 Aquarium temperature control
🌱 Greenhouse climate control
🧊 Refrigerator temperature regulation
🔬 Laboratory temperature systems
❄ DIY cooling and heating projects
📊 XH-W3002 vs W1209 Temperature Controller
| Feature | XH-W3002 | W1209 |
|---|---|---|
| Display | LED | 7-segment display |
| Load Capacity | 10A | 10A |
| Probe Type | Waterproof probe | NTC thermistor |
| Programming | Simple thermostat mode | Advanced parameter settings |
💡 Advantages
✅ High current relay output (10A)
✅ Wide temperature measurement range
✅ Waterproof temperature probe
✅ Easy setup and operation
✅ Suitable for heating and cooling control
⚠️ Limitations
❌ Limited advanced programming options
❌ Requires proper electrical wiring for safety
❌ Accuracy depends on probe placement
🔧 Example DIY Project
🌱 Smart Greenhouse Temperature Control
Components
XH‑W3002 Digital Temperature Controller
Heating lamp or cooling fan
Power supply
Greenhouse enclosure
Working
✔ Sensor monitors greenhouse temperature
✔ Controller activates fan or heater automatically
✔ Maintains optimal temperature for plant growth
