---
product_id: 774272392
title: "AZDelivery 3 x KY-021 Magnet Switch Mini Magnet Reed Module Sensor compatible with Arduino Including E-Book!"
brand: "azdelivery"
price: "$14"
currency: MXN
in_stock: false
url: https://www.desertcart.mx/products/774272392-azdelivery-3-x-ky-021-magnet-switch-mini-magnet-reed
store_origin: MX
region: Mexico
---

# Free detailed eBook included 3.3-5V wide voltage range Universal magnetic reed switch AZDelivery 3 x KY-021 Magnet Switch Mini Magnet Reed Module Sensor compatible with Arduino Including E-Book!

**Brand:** azdelivery
**Price:** $14
**Availability:** ❌ Out of Stock

## Summary

> 🧲 Unlock your smart project potential with the ultimate magnetic switch kit!

## Quick Answers

- **What is this?** AZDelivery 3 x KY-021 Magnet Switch Mini Magnet Reed Module Sensor compatible with Arduino Including E-Book! by azdelivery
- **How much does it cost?** $14 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/774272392-azdelivery-3-x-ky-021-magnet-switch-mini-magnet-reed)

## Best For

- azdelivery enthusiasts

## Why This Product

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

## Key Features

- • **Reliable One-Way Switch:** Ensures precise magnetic detection with a robust reed contact for consistent performance.
- • **Wide Voltage Compatibility:** Operates effortlessly between 3.3V and 5V, fitting diverse DIY setups.
- • **Comprehensive Starter Guide:** Includes a free eBook packed with step-by-step instructions and example scripts to jumpstart your innovation.
- • **Compact & Lightweight Design:** At just 20g and minimal dimensions, it fits perfectly into any smart home or automation project.
- • **Plug & Play Magnetic Sensing:** Seamlessly integrates with Arduino & Raspberry Pi for instant project activation.

## Overview

The AZDelivery 3 x KY-021 Magnet Reed Module Sensor is a compact, lightweight magnetic switch compatible with Arduino and Raspberry Pi. Operating within a 3.3V to 5V range, it includes a free eBook with detailed installation guides and example scripts, enabling quick and reliable integration into home automation and DIY electronics projects.

## Description

For top quality Raspberry Pi products, AZ-Delivery Vertriebs is your go to.  We provide an array of application examples, full installation guides, eBooks, libraries, and all-round assistance.  AZ-Delivery, your microelectronics expert.

## Features

- ✅ Universal magnetic switch (reed contact).
- ✅ Operating voltage 3.3 V - 5 V.
- ✅ The free eBook 📖 with installation instructions and example script from AZ-Delivery allows you to start your project directly without having to spend a lot of time setting up the product.
- ✅ This product includes an E-Book that provides useful information on how to begin your project, it helps with a quick setup and saves time on the configuration process. We provide an array of application examples, full installation guides and libraries.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | AZDelivery |
| Part number | 3x KY-021 |
| Item Weight | 20 g |
| Package Dimensions | 8.64 x 6.5 x 1 cm; 20 g |
| Item model number | KY-021 |
| Item Package Quantity | 1 |
| Switch Type | 1-way |
| Plug profile | PCB Mount, Panel Mount |
| Batteries included? | No |
| Batteries Required? | No |

## Product Details

- **Operation mode:** ON-OFF
- **Operating voltage:** 5 Volts
- **Contact type:** Normally Open
- **Connector type:** Fast
- **Brand:** AZDelivery
- **Terminal:** Solder
- **Circuit type:** 1-way
- **Mounting type:** PCB Mount, Panel Mount
- **Actuator type:** Push Button
- **Contact material:** Alloy Steel

## Images

![AZDelivery 3 x KY-021 Magnet Switch Mini Magnet Reed Module Sensor compatible with Arduino Including E-Book! - Image 1](https://m.media-amazon.com/images/I/71QowTit5uL.jpg)
![AZDelivery 3 x KY-021 Magnet Switch Mini Magnet Reed Module Sensor compatible with Arduino Including E-Book! - Image 2](https://m.media-amazon.com/images/I/61KyVark9mL.jpg)
![AZDelivery 3 x KY-021 Magnet Switch Mini Magnet Reed Module Sensor compatible with Arduino Including E-Book! - Image 3](https://m.media-amazon.com/images/I/6138B445yaL.jpg)
![AZDelivery 3 x KY-021 Magnet Switch Mini Magnet Reed Module Sensor compatible with Arduino Including E-Book! - Image 4](https://m.media-amazon.com/images/I/71o2TrHW48L.jpg)
![AZDelivery 3 x KY-021 Magnet Switch Mini Magnet Reed Module Sensor compatible with Arduino Including E-Book! - Image 5](https://m.media-amazon.com/images/I/61wLBqcvczL.jpg)

---

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**Shop now:** [https://www.desertcart.mx/products/774272392-azdelivery-3-x-ky-021-magnet-switch-mini-magnet-reed](https://www.desertcart.mx/products/774272392-azdelivery-3-x-ky-021-magnet-switch-mini-magnet-reed)

---

*Product available on Desertcart Mexico*
*Store origin: MX*
*Last updated: 2026-01-26*