---
product_id: 84430685
title: "Blackt Electrotech(BT-31H): PIR Wall Mounted Hidden Infrared Motion Sensor Switch with (ON/Off/PIR Button)"
brand: "blackt electrotech"
price: "€ 16.22"
currency: EUR
in_stock: true
reviews_count: 8
category: "Blackt Electrotech"
url: https://www.desertcart.hr/products/84430685-blackt-electrotech-bt-31h-pir-wall-mounted-hidden-infrared-motion
store_origin: HR
region: Croatia
---

# 600W max load for incandescent lamps Adjustable ambient light sensor 3-2000 LUX 160° wide detection angle Blackt Electrotech(BT-31H): PIR Wall Mounted Hidden Infrared Motion Sensor Switch with (ON/Off/PIR Button)

**Brand:** blackt electrotech
**Price:** € 16.22
**Availability:** ✅ In Stock

## Summary

> 🚀 Elevate your space with invisible intelligence — motion sensing that works smarter, not harder!

## Quick Answers

- **What is this?** Blackt Electrotech(BT-31H): PIR Wall Mounted Hidden Infrared Motion Sensor Switch with (ON/Off/PIR Button) by blackt electrotech
- **How much does it cost?** € 16.22 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/84430685-blackt-electrotech-bt-31h-pir-wall-mounted-hidden-infrared-motion)

## Best For

- blackt electrotech enthusiasts

## Why This Product

- Trusted blackt electrotech brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Reliable & Safe Automation:** Built-in integrated circuit with automatic day/night detection guarantees secure, hands-free lighting control.
- • **Effortless Wall Integration:** Sleek 2-module design for quick, hidden installation that blends seamlessly with your smart home aesthetic.
- • **Energy-Saving Power Control:** Supports up to 600W incandescent and 200W energy-saving lamps, cutting down your electricity bills smartly.
- • **Ultra-Wide Motion Detection:** Covers a broad 160° field up to 9 meters, ensuring no movement goes unnoticed in your space.
- • **Smart Ambient Light Adjustment:** Customize sensor sensitivity from twilight to daylight (3-2000 LUX) for perfect automation anytime.

## Overview

The Blackt Electrotech BT-31H is a wall-mounted PIR infrared motion sensor switch designed for seamless, energy-efficient home automation. Featuring a wide 160° detection range up to 9 meters, adjustable ambient light sensitivity (3-2000 LUX), and support for loads up to 600W, it offers reliable, safe, and customizable lighting control. Its compact 2-module design ensures easy, hidden installation, making it a top choice for modern smart homes seeking convenience and energy savings.

## Description

Product Description About Blackt Electrotech In introducing a BlackT Electrotech which is based on planning and dedication of skilled persons as concern with applications of Embedded System through modern conceptual products like Remote Switching System, Motion Sensor, Timer, etc. Our mission is to reach Blackt’s product to wide range of customers. We work for you and you’re our boss. And Technology is a Features we will show you the Benefits. We shall continue it for many blessing up coming years. We are provide technical service & Smart home automation systems after selling product/service. The quality of the range is periodically checked by team of quality inspectors. our entire range of products is packed in quality approved packaging material such as corrugated and boxes that keep it completely safe from internal and external hazard. Wall Mounted Infrared Motion Sensor Smart Detector The product is a new saving-energy switch, it adopts good sensitivity detector, integrated circuit. It gathers automatism, convenient safe, saving-energy and practical functions. It utilizes the infrared energy from human as control-signal source, it can start the load at once when one enters detection field. It can identify day and night automatically. It is easy to install and used widely. Functions Can identify day and night: The consumer can adjust work ambient light. It can work in the daytime and at night when it is adjusted on the “sun” position (max). It can work in the ambient light less than 3LUX when it is adjusted on the “moon” position (min). As for the adjustment pattern, please refer to the testing pattern. Specifications Power Source: 220 -240V/AC Detection Range: 160° *Power Frequency: 50Hz Working Temperature:-20~+40℃ *Ambient Light:3-2000LUX(adjustable) Working Humidity:<93%RH *Time-Delay : min:10sec±3sec Installation Height: 1m-1.8m *Max:7min±2min Power Consumption:0.45W (work) Package Includes 1 x Sensor unit 1 x Installation Manual Bill

Review: Best sensor - After 1 yer review best sensor everyone buy this sensor
Review: Auto on off - Works quite well

## Features

- Easy Installation: Hidden Modular Infrared Motion Sensor can be easily installed on your wall with minimal effort with stranded size of 2 module plate .
- Wide detection range/Dispatch: of 160° with 9 Meter max (<24°C) for effective motion detection in a wide area
- Energy Efficient: With a rated load of 600W (incandescent lamp) and 200W (energy-saving lamp), this motion sensor switch is an energy-efficient option for your home.
- Adjustable Ambient Light: The ambient light sensor is adjustable, ranging from 3-2000LUX, which allows you to customize the sensitivity of the motion sensor.
- Safe and Convenient: With automatic detection and an integrated circuit, the Blackt Electrotech BT31H PIR Wall Mounted Hidden Modular Infrared Motion Sensor switch provides a safe and convenient way to control your home lighting.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07HK8L5XT |
| Antenna Location | Residential Energy Management, Residential Security |
| Best Sellers Rank | #14,247 in Home Improvement ( See Top 100 in Home Improvement ) #2 in Motion-Activated Wall Switches |
| Brand | Blackt Electrotech |
| Built-In Media | false |
| Colour | White |
| Compatible Devices | Light |
| Country of Origin | India |
| Customer Reviews | 3.9 out of 5 stars 177 Reviews |
| Item Dimensions D x W x H | 5D x 7.5W x 7.5H Centimeters |
| Item Weight | 99 Grams |
| Manufacturer | Blackt Electrotech |
| Maximum Range | 9 metres |
| Mfr Part Number | BT-3123 |
| Model Number | BT-3123 |
| Mounting Type | Wall Mount |
| Power Source | 220v,Power |
| UPC | 710918665092 |
| Upper Temperature Rating | 40 Degrees Celsius |

## Product Details

- **Brand:** Blackt Electrotech
- **Colour:** White
- **Power Source:** 220v,Power
- **Item Weight:** 99 Grams
- **Maximum Range:** 9 metres

## Images

![Blackt Electrotech(BT-31H): PIR Wall Mounted Hidden Infrared Motion Sensor Switch with (ON/Off/PIR Button) - Image 1](https://m.media-amazon.com/images/I/51tPAIwhCnL.jpg)
![Blackt Electrotech(BT-31H): PIR Wall Mounted Hidden Infrared Motion Sensor Switch with (ON/Off/PIR Button) - Image 2](https://m.media-amazon.com/images/I/71QNaqTyYPL.jpg)
![Blackt Electrotech(BT-31H): PIR Wall Mounted Hidden Infrared Motion Sensor Switch with (ON/Off/PIR Button) - Image 3](https://m.media-amazon.com/images/I/61yFJRjESEL.jpg)
![Blackt Electrotech(BT-31H): PIR Wall Mounted Hidden Infrared Motion Sensor Switch with (ON/Off/PIR Button) - Image 4](https://m.media-amazon.com/images/I/71vpzeka3pL.jpg)
![Blackt Electrotech(BT-31H): PIR Wall Mounted Hidden Infrared Motion Sensor Switch with (ON/Off/PIR Button) - Image 5](https://m.media-amazon.com/images/I/61aiLP5uw7L.jpg)

## Questions & Answers

**Q: Does it have dusk to dawn so that the motion sensor works only at night?**
A: Yes, sir you can Set as per your requirement Ambient Light: 3-2000LUX (Adjustable)

**Q: Is this like a auto sensor light?**
A: It motion sensor, it will turn ON after detecting a motion

**Q: 2 module or 4 module size**
A: 50X50 CM size

**Q: can this replace standard single switch electric box?**
A: Not Applicable

## Customer Reviews

### ⭐⭐⭐⭐⭐ Best sensor
*by P***R on 9 December 2025*

After 1 yer review best sensor everyone buy this sensor

### ⭐⭐⭐⭐⭐ Auto on off
*by T***. on 20 October 2024*

Works quite well

### ⭐⭐⭐⭐ Good product
*by V***Y on 16 October 2020*

Good Product Fist i purchase 1 pic Then purchase 4 pic for my office

## Frequently Bought Together

- Blackt Electrotech(BT-31H): PIR Wall Mounted Hidden Infrared Motion Sensor Switch with (ON/Off/PIR Button)
- Blackt Electrotech : BT31W PIR Sensor Motion Sensor Energy Saving Motion Detector Wall Mounted (1)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-16*