---
product_id: 41308582
title: "10Pcs Reed Switch Normally Open (N/O) Magnetic Induction Switch Electromagnetic for Arduino (Pack of 10) CYT1004"
brand: "cylewet"
price: "$366"
currency: MXN
in_stock: true
reviews_count: 12
category: "Cylewet"
url: https://www.desertcart.mx/products/41308582-10pcs-reed-switch-normally-open-n-o-magnetic-induction-switch
store_origin: MX
region: Mexico
---

# 300V max switching voltage Compact 45mm length 0.55A max switching current 10Pcs Reed Switch Normally Open (N/O) Magnetic Induction Switch Electromagnetic for Arduino (Pack of 10) CYT1004

**Brand:** cylewet
**Price:** $366
**Availability:** ✅ In Stock

## Summary

> 🧲 Magnetically precise switches for the DIY innovator’s toolkit!

## Quick Answers

- **What is this?** 10Pcs Reed Switch Normally Open (N/O) Magnetic Induction Switch Electromagnetic for Arduino (Pack of 10) CYT1004 by cylewet
- **How much does it cost?** $366 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/41308582-10pcs-reed-switch-normally-open-n-o-magnetic-induction-switch)

## Best For

- cylewet enthusiasts

## Why This Product

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

## Key Features

- • **Durable Glass Encapsulation:** Protects sensitive contacts while maintaining IP54-level dust and splash resistance for longevity.
- • **Compact & Lightweight Design:** Slim 14mm glass tube and 2mm diameter fit seamlessly into tight spaces without adding bulk.
- • **Precision Magnetic Activation:** Normally open reed switch triggers reliably with subtle magnetic fields, perfect for Arduino projects.
- • **High Voltage & Current Tolerance:** Handles up to 300V and 0.55A, ensuring robust performance in diverse electronic applications.
- • **Pack of 10 for Prototyping & Scaling:** Bulk pack lets you experiment, iterate, and deploy multiple sensors without running out.

## Overview

This pack of 10 normally open reed switches offers high sensitivity magnetic activation with a compact 45mm form factor. Rated for up to 300V and 0.55A, these glass-encased switches are ideal for Arduino and microcontroller projects requiring reliable electromagnetic sensing. Their durable design and bulk packaging make them a must-have for prototyping and scalable electronic solutions.

## Description

Specifications: Glass Length: 14mm/ 0.55inches Glass Diameter: 2mm/ 0.079inches Total Length: 45mm/ 1.77inches Max Switching Voltage: 300 VDC Min Breakdown Voltage: 150 VDC Max Contact Rating: 10W Max Switching Current: 0.55 A Package Includes: 10×Reed Switch

Review: works really well - for the most part, the switches seem to be very good. as i have noticed in other reviews, you have to test the switches first when they arrive. of the 10 switches i received, 4 of them did not work properly. i contacted the seller, and they promptly issued a partial refund, which is exactly what i requested. i didn't need all 10, so i couldn't see any reason to return the order and get a replacement. i have already installed the switches that i needed, and they work perfectly. as a side note, not all reed switches have exactly the same magnetic sensitivity, so check all your distances before closing up whatever you are fixing. also, do not assume that a switch isn't working if you install it in the original position. i had to adjust the position of my replacement switch about 1/32" further away from the magnet than from the original.
Review: Cylewet Reed Switches - The ten reed switches were packaged in a zip-lock type bag which was in a small plastic box. Good protection for mailing since these switches are tiny and fragile. I tested all 10 pieces upon arrival and they all had contact resistances less than 1 ohm when closed with a small magnet. As shown in the attached photos, I used one switch to replace a reed switch, in an Acurite rain gauge, that failed to close when activated by a magnet . Precautions were taken when bending the leads to fit in the printed circuit board. The excess leads were trimmed only after the switch had been soldered in place. The new reed switches were easily activated with the small magnet on the rain gauge's tipping bucket and the gauge now works perfectly.

## Features

- Good sensitivity
- A compact, small size and light weight

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01NBPDU04 |
| Best Sellers Rank | #269,498 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #69 in Reed Switches |
| Brand | Cylewet |
| Circuit Type | 1-way |
| Compatible Devices | Arduino, Raspberry Pi, other microcontrollers, and any device requiring a normally open switch with the specified ratings |
| Connectivity Protocol | X-10 |
| Connector Type | Screw Terminals |
| Contact Material | Glass |
| Contact Type | Normally Open |
| Control Method | Sensor |
| Control Type | Magnetic |
| Current Rating | 0.55 Amps |
| Date First Available | December 29, 2016 |
| International Protection Rating | IP54 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.352 ounces |
| Item model number | CYT1004 |
| Manufacturer | Qianxin |
| Mounting Type | DIN Rail Mount |
| Number of Items | 10 |
| Number of Positions | 10 |
| Operating Voltage | 300 Volts |
| Operation Mode | ON-OFF |
| Package Dimensions | 2.44 x 1.81 x 0.71 inches |
| Terminal | Through Hole |
| UPC | 751940149006 717850057640 |
| Unit Count | 10 Count |
| Wattage | 10 watts |

## Product Details

- **Brand:** Cylewet
- **Circuit Type:** 1-way
- **Connector Type:** Screw Terminals
- **Contact Type:** Normally Open
- **Current Rating:** 0.55 Amps
- **Material:** Glass
- **Operating Voltage:** 300 Volts
- **Operation Mode:** ON-OFF
- **Switch Type:** Reed Switch (Normally Open)
- **Terminal:** Through Hole

## Images

![10Pcs Reed Switch Normally Open (N/O) Magnetic Induction Switch Electromagnetic for Arduino (Pack of 10) CYT1004 - Image 1](https://m.media-amazon.com/images/I/61X99aqKfAL.jpg)

## Questions & Answers

**Q: What is the AT rating of these switches?**
A: The AT rating is the Amp Turn rating of gauss to activate the switch. Since the vendor does not know this simple term best to stay away from this switch.

**Q: How close do you have to be to set it off?**
A: While using a rather strong NeodymiumBoron magnet, I was somewhat disappointed to find I had to be within an inch or 2.5 cm to get it to close.

**Q: what are the dimensions of the glass tube?  Diameter, approx length?**
A: I'm pretty sure this is what I have; glass part is  .5 inches.
I didn't use them; I found if you put pressure on the tails, they crack.

**Q: Is this latching, or only magnet presence?**
A: These are NOT latching... only close in presence of magnetic field...and does not require much to close. I use these routinely under 1-2 inches of plastic and can still get them to actuate with a very small 1/4" neodymium magnet.

## Customer Reviews

### ⭐⭐⭐⭐⭐ works really well
*by D***V on March 14, 2020*

for the most part, the switches seem to be very good. as i have noticed in other reviews, you have to test the switches first when they arrive. of the 10 switches i received, 4 of them did not work properly. i contacted the seller, and they promptly issued a partial refund, which is exactly what i requested. i didn't need all 10, so i couldn't see any reason to return the order and get a replacement. i have already installed the switches that i needed, and they work perfectly. as a side note, not all reed switches have exactly the same magnetic sensitivity, so check all your distances before closing up whatever you are fixing. also, do not assume that a switch isn't working if you install it in the original position. i had to adjust the position of my replacement switch about 1/32" further away from the magnet than from the original.

### ⭐⭐⭐⭐⭐ Cylewet Reed Switches
*by 7***S on September 17, 2020*

The ten reed switches were packaged in a zip-lock type bag which was in a small plastic box. Good protection for mailing since these switches are tiny and fragile. I tested all 10 pieces upon arrival and they all had contact resistances less than 1 ohm when closed with a small magnet. As shown in the attached photos, I used one switch to replace a reed switch, in an Acurite rain gauge, that failed to close when activated by a magnet . Precautions were taken when bending the leads to fit in the printed circuit board. The excess leads were trimmed only after the switch had been soldered in place. The new reed switches were easily activated with the small magnet on the rain gauge's tipping bucket and the gauge now works perfectly.

### ⭐⭐⭐⭐⭐ Quality switches that look good
*by S***Y on May 4, 2021*

Awesome little switches. I purchased these for a little 3d printed 22re engine. The switches work great near a magnetic field, but be sure to verify they do work. Please be careful, the glass body looks good but break very easily. I broke several while trying to get them into my 3d print and at one point I had a piece of glass go into my eye. This was my fault and not the products, just be careful if you are near sighted like me.

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*Product available on Desertcart Mexico*
*Store origin: MX*
*Last updated: 2026-02-27*