Help
Compel Groupgroup

Reed Switch Module | LM393 Sensor | For Arduino DIY Electronics Kits

Stock Nr:
SKU:
Reed Switch Module | LM393 Sensor | For Arduino DIY Electronics Kits - Image 1
1 / 6
£4.99inc VAT

This G123-08 module is a magnetic sensor. It has a reed switch and an LM393 chip. When a magnet is near, the LM393 gives a clear digital signal. This makes it good for Arduino projects and other DIY e...

Select an option
£4.99
Fast Shipping
Secure Payment
Easy Returns

Good to know

Questions about this product

What kind of projects is this reed sensor module typically used for?
It's a magnetic switch, so it's ideal for detecting when something is open or closed. Common uses include DIY window and door alarms, cabinet light switches, or as a non-contact limit switch on custom machinery.
Can I connect this G123-08 module straight to an Arduino?
Yes, it's designed to work directly with microcontrollers like an Arduino or Raspberry Pi. The board has a switching transducer output that provides a clean digital signal, making it simple to read on a digital input pin.
What does the LM393 chip on the board actually do?
The LM393 is a voltage comparator. It takes the simple on/off signal from the glass reed switch and turns it into a stable, clean digital output for your project. This helps prevent false readings from electrical noise or switch 'bounce'.

Proximity Sensors spec sheet (PDF)

Get a one-page sheet with full description, specifications, technical details, FAQs, price & SKU - handy to save, print, or share.

Not sure which one?

Compare proximity sensors

This product
G123-08 LM393 reed switch sensor module with magnetron, ideal for DIY Arduino projects.

Reed Switch Module | LM393 Sensor | For Arduino DIY Electronics Kits

Price£4.99
Rating4.9(29)
Sold400+
Stock In stock
You're viewing this
Alternative
A G123-08 LM393 reed switch module, featuring a magnetic sensor for Arduino DIY kits, shown with its components.

Switch Module | G123-08 with LM393 Comparator | For Arduino DIY Kits

Price£4.99
Rating4.6(5)
Sold106+
Stock In stock
Alternative
A close-up of a GPS-01 reed switch, showcasing its slender tube and wire connections for proximity sensing.

Reed Switch | 35cm Tube Length | Normally Open/Closed Contact

Price£8.99
Rating5.0(5)
Sold110+
Stock In stock
Alternative
Five PS-3150 door/window magnetic control reed switches, normally open/closed, 14x23mm with magnet.

Reed Switch | For Door & Window Alarms | NO/NC 14x23mm PS-3150

Price£10.99
Rating4.5(11)
Sold60+
Stock In stock
Alternative
Five GPS-23 reed switch magnetic control sensors, 23x14mm, designed for normally open/closed applications.

Reed Switch | GPS-23 NO/NC Control | 23x14mm PS-3150 Replacement

Price£11.99
Rating4.9(9)
Sold128+
Stock In stock
Alternative
A PS-3150 normally open reed switch sensor with a 30cm wire, ideal for door and window contacts.

Window Reed Switch | Proximity Sensor with 30cm Wire | PS-3150 NO

Price£4.99
Rating4.6(113)
Sold1,000+
Stock In stock
Alternative
Various models of magnetic reed switch proximity sensors for pneumatic cylinders, shown with different cable lengths.

Reed Switch | Proximity Sensor for Pneumatic Cylinders | CS1-G/U/F

Price£4.99
Rating5.0(4)
Sold441+
Stock In stock
Alternative
Five MKA50202 reed switch tubes, 5x50MM, designed for high-power, high-current applications up to 5A/250W.

High-Power Reed Switch | 5A 250W Normally Open | 5x50mm MKA50202 Glass Tube

Price£6.99
Rating4.9(8)
Sold60+
Stock In stock
Alternative
A 5-pack of 3-pin magnetic reed switch sensors, 2.5x14mm, with NO/NC conversion.

3-Pin Reed Switch | NO/NC Conversion | Magnetic Sensor 2.5x14mm

Price£4.99
Rating4.9(123)
Sold600+
Stock In stock

Compare options

More Proximity Sensors

Explore the range

Popular in Industrial & Machinery

Complete the set

Accessories & add-ons