💡 XH-M131 — DC 12V Light Control Switch (Photosensitive Relay Module)
Automatically switch devices on or off based on ambient light levels. This compact photosensitive relay module uses a photoresistor probe (±150 mm lead) with an adjustable sensitivity potentiometer to trigger a built-in 12V relay (10A / 250V AC or 30V DC). Ideal for DIY dusk-to-dawn lighting, security lights, garden automation, and gate lighting projects. MPN: XH-M131.
⚡ Key Features
- Photoresistor Light Detection — external probe (±150 mm lead) detects ambient light levels and triggers the relay when brightness crosses the set threshold
- Adjustable Threshold — onboard potentiometer lets you fine-tune the light/dark trigger point for your specific installation
- 12V DC Input — powered by any 12V DC source (power supply, battery, solar system, gate motor battery, etc.)
- 10A Relay Output — switches loads up to 10A at 250V AC or 30V DC — handles lights, motors, pumps, and more
- Normally Closed (NC) Relay — relay defaults to closed; opens when light threshold is met (or configure via wiring for your logic)
- LED Status Indicators — red LED = power on, blue LED = relay active
- Ultra-Compact — 31 × 53 × 16.5 mm, only 20 g — fits anywhere
🏠 Perfect For
Dusk-to-Dawn Lighting
Automatically turn on driveway, garden, or security lights at sunset and off at sunrise. No smart home system needed — pure hardware automation.
Gate & Driveway Lights
Power from the gate motor’s 12V battery. Light turns on when it gets dark — perfect for illuminating the entrance when you arrive home.
Greenhouse & Garden
Trigger supplemental grow lights when natural light drops below a set level. Pair with a timer for full day/night lighting schedules.
DIY & Maker Projects
Use as a light-triggered relay in any 12V project: display cases, aquarium lighting, decorative lighting, alarm systems, or sensor-based automation.
🚗 Gate & Garage Controllers
SONOFF MINI-D Smart Switch
Matter-certified dry contact switch for gates, garage doors, and boilers. AC 100–240V or DC 12–48V input. NO/NC/COM terminals. Inching mode for pulse triggers. R289.
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eWeLink SV Inching WiFi Switch
DC 5–24V WiFi switch with inching (momentary pulse) and self-locking modes. Ideal for gate motors, garage openers, and low-voltage automation. R179.
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📋 Technical Specifications
| Product | XH-M131 DC 12V Light Control Switch |
| MPN / Model | XH-M131 |
| Type | Photosensitive Relay Module |
| Input Voltage | DC 12V |
| Relay Load | 10A / 250V AC or 30V DC |
| Relay Type | Normally Closed (NC) |
| Sensor | Photoresistor (LDR) on ±150 mm lead cable |
| Threshold Adjustment | Onboard potentiometer (variable) |
| LED Indicators | Red = power on · Blue = relay active |
| Dimensions | 31 × 53 × 16.5 mm |
| Weight | 20 g |
| Package Contents | 1 × Photosensitive relay module · 1 × Probe cable |
| Warranty | 1 Year Manufacturer Warranty |
❓ Frequently Asked Questions
How do I adjust the light sensitivity?
Can I power it from my gate motor battery?
Can it switch 220V mains lights?
Is this a smart / WiFi device?
🤝 Need Help? We’re Here for You!
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Gauteng, 1709
Automatic Lighting. Simple. Affordable.
12V light-triggered relay — dusk-to-dawn automation for just R39.
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