Are you certain these switches are normally closed ? The picture of the light circuit indicates they are normally open, without magnet.

You are correct. Almost all of the reed switches on Amazon universally have the NO/NC descriptions backwards. Even the guy who responded to you about his RV steps was mistaken as his application would require a normally closed switch (ie. door opening and removing the magnet would allow the current to flow). I think the big misunderstanding is these vendors (and some people) think the "normal" position is with a magnet adjacent the reed switch. It is not.

Can this be used in a 12v application? I wanted to use ground to trigger a negative input(car alarm application)

Yes, I am also using it for 12V lights. You limit is going to be the 0.5amp load.

Are these waterproof or at least water resistant?

Yes . It is water proof . Just only wires connection for sensor ( over 10'' long) must be in dry area.

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Gebildet 3 sets Black Magnetic Switch Wiring NO/NC Recessed Door Sensor Hidden Window Contact Reed Switch for Access Control Replace Alarm System

Gebildet 3 sets Black Magnetic Switch Wiring NO/NC Recessed Door Sensor Hidden Window Contact Reed Switch for Access Control Replace Alarm System

Product ID: 217666327

Details

Brand
Gebildet
Connector type
Crimp
Contact type
Normally
Current rating
0.5 Amps
Item dimensions L x W x H
14 x 11 x 1.1
Material
Plastic

🔄Dual NO/NC switch modes

🔋Supports 1-100V DC power range

🔧Compact 29x15x9 mm size

R506

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Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔒 Elevate your security game with stealth and precision!

COMPLETE INSTALLATION KIT - Includes screws and stickers for quick, professional-grade mounting.
DISCREET DURABLE DESIGN - Sleek black ABS casing with a compact form factor fits hidden in doors or windows.
RELIABLE LONG TERM SECURITY - Engineered for 1,000,000+ cycles to keep your access control flawless.
DUAL MODE MAGNETIC SWITCHING - Choose normally open or normally closed contacts to tailor your security setup.
SEAMLESS VOLTAGE COMPATIBILITY - Works effortlessly across 3V to 100V DC systems for ultimate flexibility.

The Gebildet 3-set Black Magnetic Switch Wiring kit offers versatile, dual-mode magnetic door/window sensors compatible with 1-100V DC systems. Designed for discreet recessed installation, each sensor features a compact ABS body, 30cm cable, and supports up to 0.5A current and 10W power. Ideal for modern access control and alarm systems, it includes all mounting accessories and promises over a million reliable activations.

Specifications

ASIN	B085XQLQ3N
Best Sellers Rank	66,688 in DIY & Tools ( See Top 100 in DIY & Tools ) 651 in Switches & Dimmers
Brand	Gebildet
Circuit Type	2-way
Colour	Black
Compatible Devices	Security System
Connector Type	Crimp
Contact Material	Plastic
Contact Type	Normally Closed
Control Method	Sensor
Control Type	Magnetically Controlled
Country Of Origin	China
Current Rating	0.5 Amps
Customer Reviews	4.2 4.2 out of 5 stars (898)
Item Dimensions	14 x 11 x 1.1 centimetres
Item Weight	0.05 Kilograms
Manufacturer	Gebildet
Manufacturer Part Number	DE453
Material	Plastic
Model Number	DE453
Mounting Type	Wall Mount
Number of Items	1
Number of Positions	1
Operating Voltage	100 Volts
Operation Mode	NC-NO
Specification Met	CE
Switch Type	Magnetic Switch
Terminal	Crimp
UPC	726972605882
Wattage	10 watts

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R506

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Africa.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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