How is this wired: to a transmitter? to the garage opener? Why 28V?

It's a simple switch, more for someone knowledgeable about basic electronic components. You could hook it up to a power supply and a light, to turn on a light when it the magnet is nearby. Or you could hook it up to a smart house hub designed to take in simple signals. It's not just 28V, it's 0V-28V (simple answer, more volts = more heat = higher chance of fire. bigger wires reduces heat/volt, but increases cost of device, so they limit it to a chosen level, in this case 28V)

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Magnetic Switch Alarm Sensor Overhead Garage Door Contacts with L Bracket

Product ID: 489549962

Details

Brand
WESUA
Color
silver-grey
Power Source
Corded
Product Dimensions
9.84"L x x
Voltage
28 volts

💧Epoxy sealed waterproof

🔩Alloy zinc durable case

🛠️Adjustable L bracket fit

AR$56588

Duties & taxes included

In stock

Sold byAmazon ArgentinaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔐 Secure your space with smart, sturdy sensor tech!

WATERPROOF EPOXY SEAL - Reliable performance rain or shine, no corrosion worries
RUGGED ALLOY ZINC BUILD - Engineered for long-lasting durability in any environment
WIDE 50 MM OPERATION GAP - Designed to detect even large door gaps with precision
UNIVERSAL L BRACKET MOUNT - Customizable fit for most overhead garage door channels
SEAMLESS ALARM INTEGRATION - Effortlessly pairs with existing security systems for instant alerts

The WESUA Magnetic Switch Alarm Sensor features a robust alloy zinc case with waterproof epoxy sealing and an adjustable aluminum L bracket, ensuring easy installation and reliable detection for overhead garage doors with gaps ≥50mm. Compatible with 28V DC systems, it offers a normally closed reed switch that triggers alarms instantly upon door opening, making it ideal for both residential and industrial security upgrades.

Specifications

ASIN	B0BCYHBKVF
Best Sellers Rank	#106,618 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #31 in Garage Door Sensors #22,342 in Hardware
Brand	WESUA
Built-In Media	Switch
Color	silver-grey
Customer Reviews	4.6 4.6 out of 5 stars (167)
Item Dimensions L x W x H	9.84"L x 1.89"W x 4.17"H
Item Weight	0.25 kg
Manufacturer	WESUA
Mfr Part Number	MCS-61L
Model Name	MCS-61L
Model Number	MCS-61L
Mounting Type	Wall Mount
Number of Items	1
Number of Packs	1
Power Source	Corded Electric
Sensor Technology	Contact Sensor
Voltage	28 volts

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