---
product_id: 64722854
title: "Blackt Electrotech BT31FC Fall/Recessed Ceiling Mounted Plastic Energy Saving PIR Motion Sensor Switch with Light Sensor (White)"
brand: "blackt electrotech"
price: "R$140"
currency: BRL
in_stock: true
reviews_count: 8
category: "Blackt Electrotech"
url: https://www.desertcart.com.br/products/64722854-blackt-electrotech-bt31fc-fall-recessed-ceiling-mounted-plastic-energy-saving
store_origin: BR
region: Brazil
---

# Adjustable 10s–7min delay Supports up to 1200W load 360° detection range Blackt Electrotech BT31FC Fall/Recessed Ceiling Mounted Plastic Energy Saving PIR Motion Sensor Switch with Light Sensor (White)

**Brand:** blackt electrotech
**Price:** R$140
**Availability:** ✅ In Stock

## Summary

> 🚀 Elevate your space with seamless, smart motion sensing—never miss a beat!

## Quick Answers

- **What is this?** Blackt Electrotech BT31FC Fall/Recessed Ceiling Mounted Plastic Energy Saving PIR Motion Sensor Switch with Light Sensor (White) by blackt electrotech
- **How much does it cost?** R$140 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/64722854-blackt-electrotech-bt31fc-fall-recessed-ceiling-mounted-plastic-energy-saving)

## 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

- • **Tailored Timing Control:** Customize your environment with an adjustable time delay from 10 seconds to 7 minutes for perfect automation.
- • **Smart Ambient Light Sensing:** Automatically activates only in low light (3 to 2000 lux), saving energy without sacrificing comfort.
- • **Versatile Load Compatibility:** Seamlessly supports incandescent, LED, CFL lights, and fans up to 1200 watts—power your space your way.
- • **Full-Spectrum Motion Coverage:** 360-degree detection ensures no movement goes unnoticed, maximizing security and convenience.
- • **Reliable & Robust Performance:** Detects motion up to 7 meters at speeds of 0.6–1 m/s, backed by an 18-month warranty for peace of mind.

## Overview

The Blackt Electrotech BT31FC is a ceiling-mounted PIR motion sensor switch featuring a full 360-degree detection range and adjustable time delay settings from 10 seconds to 7 minutes. Designed for energy efficiency, it includes an ambient light sensor adjustable between 3 and 2000 lux, activating only when needed. Compatible with various lighting types and fans up to 1200 watts, it offers reliable detection up to 7 meters and comes with an 18-month warranty, making it a smart, durable choice for modern energy management.

## Description

Blackt Electrotech BT31FC Fall/Recessed Ceiling Mounted Plastic Energy Saving PIR Motion Sensor Switch with Light Sensor (White) : desertcart.in: Home Improvement

Review: Its nice - The quality is good… but the size of the sensor is too big… I thought it would be of 1 inch… but it is almost 3 inches…. Overall ita nice…
Review: Value for money. Bulky product. - It is over all a good product. Finishing is not very good. However cable connecters are of very good quality. Product is quite bulky. I had a LED light in my ceiling before fitting perfectly. But to install it i had to do some retrofiting just to accommodate its bulky body. Still hangs out a little. Other than that working wise works great as mentioned in description. Also can be installed to a heavier load of about 800W. And just so that there is no confusion among new buyers, its NOT a light its simply just a switch that is triggered by motion.

## Features

- 360-Degree Detection Range: The BT31FC Motion Sensor Switch has a 360-degree detection range, providing full coverage and ensuring that no motion goes undetected.
- Adjustable Time Delay: The time delay for the motion sensor switch is adjustable, with options ranging from 10 seconds to 7 minutes, allowing for flexibility in customization.
- Suitable for a Variety of Loads: The motion sensor switch is compatible with different types of loads, including incandescent lamps, LED lights, CFLs, and fans, with a maximum load capacity of 1200 watts.
- Adjustable Ambient Light: With an adjustable ambient light feature ranging from 3 to 2000, the BT31FC Motion Sensor Switch can be customized to turn on lights only when it's dark, conserving energy and enhancing convenience.
- High-Quality Performance: The BT31FC Motion Sensor Switch has a detecting distance of up to 7 meters and motion detection speed of 0.6~1m/s, ensuring reliable and high-quality performance. 6
- Warranty: The BT31FC Motion Sensor Switch comes with an 18-month manufacturer warranty, providing customers with peace of mind and assurance of quality.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01MTD4K9A |
| Antenna Location | Residential Security, Commercial Security, Automation, Energy Management |
| Battery Description | Battery not included |
| Best Sellers Rank | #17,584 in Home Improvement ( See Top 100 in Home Improvement ) #39 in Motion Detectors |
| Brand | Blackt Electrotech |
| Built-In Media | Install by trained technician & read installation manual |
| Colour | White |
| Compatible Devices | other |
| Country of Origin | India |
| Customer Reviews | 3.9 out of 5 stars 266 Reviews |
| Item Weight | 120 Grams |
| Manufacturer | Blackt Electrotech |
| Maximum Range | 6 metres |
| Mounting Type | Ceiling Mount |
| Power Source | Corded Electric |

## Product Details

- **Brand:** Blackt Electrotech
- **Colour:** White
- **Power Source:** Corded Electric
- **Item Weight:** 120 Grams
- **Maximum Range:** 6 metres

## Images

![Blackt Electrotech BT31FC Fall/Recessed Ceiling Mounted Plastic Energy Saving PIR Motion Sensor Switch with Light Sensor (White) - Image 1](https://m.media-amazon.com/images/I/61FBr11Z-OL.jpg)

## Questions & Answers

**Q: What is this diameter in the base?**
A: 2.5 inches Diameter  appox

**Q: Can I use for split air conditioner?**
A: no not recommended

**Q: Can it count occupancy of room?**
A: No

**Q: Can we use this switch for celling fan on/off ?**
A: Anything if it's upto 300 watts and resistive load

## Customer Reviews

### ⭐⭐⭐⭐⭐ Its nice
*by A***H on 24 September 2023*

The quality is good… but the size of the sensor is too big… I thought it would be of 1 inch… but it is almost 3 inches…. Overall ita nice…

### ⭐⭐⭐⭐ Value for money. Bulky product.
*by S***T on 11 June 2020*

It is over all a good product. Finishing is not very good. However cable connecters are of very good quality. Product is quite bulky. I had a LED light in my ceiling before fitting perfectly. But to install it i had to do some retrofiting just to accommodate its bulky body. Still hangs out a little. Other than that working wise works great as mentioned in description. Also can be installed to a heavier load of about 800W. And just so that there is no confusion among new buyers, its NOT a light its simply just a switch that is triggered by motion.

### ⭐⭐⭐⭐⭐ Reliable Product
*by O***R on 3 March 2024*

I am Using This Product For Last 5 Year and its working Perfectly fine.

## Frequently Bought Together

- Blackt Electrotech BT31FC Fall/Recessed Ceiling Mounted Plastic Energy Saving PIR Motion Sensor Switch with Light Sensor (White)
- Blackt Electrotech Microwave Radar Sensor Switch - Ceiling Mounted Occupancy Motion Detector for Automatic Lighting Control (Regular Size)

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*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-02-14*