---
product_id: 477801402
title: "System Sensor 4WT-B 4-wire, photoelectric i3 smoke detector with a 135 Degree fixed thermal sensor"
brand: "system sensor"
price: "224373CFA"
currency: XOF
in_stock: false
category: "System Sensor"
url: https://www.desertcart.sn/products/477801402-system-sensor-4wt-b-4-wire-photoelectric-i3-smoke-detector
store_origin: SN
region: Senegal
---

# Photoelectric smoke detection 4-wire corded electric power 135°F fixed thermal sensor System Sensor 4WT-B 4-wire, photoelectric i3 smoke detector with a 135 Degree fixed thermal sensor

**Brand:** system sensor
**Price:** 224373CFA
**Availability:** ❌ Out of Stock

## Summary

> 🔥 Stay ahead of danger with smart, silent protection!

## Quick Answers

- **What is this?** System Sensor 4WT-B 4-wire, photoelectric i3 smoke detector with a 135 Degree fixed thermal sensor by system sensor
- **How much does it cost?** 224373CFA with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/477801402-system-sensor-4wt-b-4-wire-photoelectric-i3-smoke-detector)

## Best For

- system sensor enthusiasts

## Why This Product

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

## Key Features

- • **Built-in Base Included:** Simplifies installation and maintenance for busy managers
- • **Compact & Sleek Design:** Modern white finish fits effortlessly into any professional space
- • **Precision Thermal Sensing:** Detects heat spikes up to 135°F for early fire alerts
- • **Reliable 4-Wire Connectivity:** Ensures consistent power and communication for seamless integration
- • **Advanced Photoelectric Technology:** Captures smoke particles quickly to minimize false alarms

## Overview

The System Sensor 4WT-B is a professional-grade 4-wire photoelectric smoke detector featuring a 135°F fixed thermal sensor. Designed for reliable, early fire detection, it combines advanced photoelectric technology with a robust thermal sensor to reduce false alarms and enhance safety. Its compact white design and included base make installation straightforward, powered by corded electric supply and built to operate in up to 95% humidity environments.

## Description

Smoke Alarm Included_components: Base

## Features

- Smoke Alarm
- Included_components: Base

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0015QE0HM |
| Alarm | Audible |
| Brand | System Sensor |
| Built-In Media | Base |
| Colour | White |
| Country of Origin | USA |
| Item Dimensions D x W x H | 6.1D x 14.5W x 14.5H Centimeters |
| Item Weight | 0.51 Pounds |
| Manufacturer | SYSTEM SENSOR |
| Model Number | 4WT-B |
| Operating Humidity | 95 percent |
| Power Source | Corded Electric |
| Product Dimensions | 6.1D x 14.5W x 14.5H Centimeters |
| Product Style | Thermal |
| Sensor Type | Photoelectric |
| Style | Thermal |
| UPC | 783863017629 |
| Unit Count | 1.0 Count |
| Upper Temperature Range | 135 Degrees Fahrenheit |

## Product Details

- **Alarm:** Visual
- **Brand:** System Sensor
- **Color:** White
- **Item Weight:** 0.51 Pounds
- **Number of Items:** 1
- **Power Source:** Corded Electric
- **Product Dimensions:** 2.4"D x 5.7"W x 5.7"H
- **Sensor Type:** Photoelectric
- **Style:** Smoke Detector
- **Upper Temperature Rating:** 135 Degrees Fahrenheit

## Images

![System Sensor 4WT-B 4-wire, photoelectric i3 smoke detector with a 135 Degree fixed thermal sensor - Image 1](https://m.media-amazon.com/images/I/41TZQsLVDtL.jpg)

## Questions & Answers

**Q: Es necesario colocar una base? el sistema estará conectado al sistema de alarmas**
A: Hello,
Please submit your question in English.

**Q: Is this the update to replace model 2412?**
A: i never used 2412 unit but 4wt-b-4 should work as a replacement it is 12vdc & 2 wires to trigger alarm

**Q: I have an old unit that needs replacing. There is a 4 wire phone cord like coming out of the cieling....red/black/green and yellow, Will this work?**
A: Check the website for System Sensor to check the replacement for the original unit.

**Q: Will this mount onto a standard round ceiling box?  saw a review/complaint about detector having no base.  i'm just replacing a bad esl smoke detector**
A: It comes with new round plastic base plates in the box, but I just used the old ones that were already installed.  So I just twist-locked the new sensor into the old plastic base plate.  If the light does not come up green after installing, try resetting your whole system.  My alarm contractor had to install a resistor or something to get all the sensors to switch to green.

## Frequently Bought Together

- System Sensor 4WT-B 4-wire, photoelectric i3 smoke detector with a 135 Degree fixed thermal sensor
- IS335 WIRED PIR Motion Detector, 40' x 56' by Honeywell
- Honeywell Security 6160 Ademco Alpha Display Keypad

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**Shop now:** [https://www.desertcart.sn/products/477801402-system-sensor-4wt-b-4-wire-photoelectric-i3-smoke-detector](https://www.desertcart.sn/products/477801402-system-sensor-4wt-b-4-wire-photoelectric-i3-smoke-detector)

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-03-11*