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Reed switches are normally-open magnetic switches that close when a magnet is nearby—great for door/drawer sensors, rotation sensing, and simple on/off magnetic triggers.
Bare reed switches (for custom wiring)
- Reed Switch ($4.55) — basic glass-style reed switch for breadboards/prototyping.
- Reed Switch - Insulated ($7.50) — encapsulated/insulated for a more durable build than a bare glass reed.
Modules / breakouts (easier microcontroller hookup)
- Reed Switch Module ($4.35) — simple module with digital output (DO) style hookup.
- Standard mini Reed Switch Module ($7.80) — compact module form factor.
- LilyPad Reed Switch ($14.85) — designed for e-textiles/LilyPad sewing-style projects.
Door/window style magnetic contact sets (pre-housed)
- Magnetic contact switch (door sensor) ($5.05) — ABS housing with separate magnet piece; ideal for doors/windows/drawers.
- Magnetic Door Switch Set ($9.55) — reed switch assembly specifically aimed at door/drawer open detection.
- Magnetic Switch ($7.90) — housed sensor + magnet; triggers at roughly ~1 cm proximity.
Showing 1-20 of 46 products · 14 unavailable products hidden
Magnetic Switch
This magnetic switch consists of two parts: a reed switch sensor with cable and a magnet trigger in a plastic housing. When the magnet is brought within approximately 1 cm of the sensor, the reed switch closes, allowing you to detect position changes, door/window states, and proximity events. Th...
Cup Anemometer with RJ11 Connector
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This anemometer measures wind speed using rotating cups that turn an enclosed magnet. On each rotation, the magnet closes a reed switch, producing a simple pulse output that can be counted by your electronics.The output is available on the two inner conductors of the RJ11 connector, pins 2 and 3....
5V SPST DIL Reed Relay
This small, lightweight 5V SPST reed relay is designed for PCB mounting in a standard DIL (Dual In-Line) package. It switches up to 1A DC with a low 0.1W power consumption, making it suitable for low-power switching applications in sensor circuits, security systems, and instrumentation. Key Feat...
Magnetic Door Switch Set
This is the Magnetic Door Switch Set, a small reed switch assembly specifically designed to alert you when doors, drawers, or any other aperture opens. These types of switches are primarily used in home security systems. One half of the assembly set on a window or door frame and the other attache...
Magnetic Contact Switch Sensor for Arduino
This magnetic switch (reed switch) consists of two magnetic reeds (usually composed of iron and nickel) sealed in a plastic case. The two magnetic reeds are overlapped but there is a small gap between them. When a suitable external magnetic field comes within 2cm, the two magnetic reeds will cont...
Magnetic contact switch (door sensor)
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A magnetic reed switch encased in an ABS plastic shell, commonly used to detect when a door, window, or drawer is opened. The switch half contains a normally-open reed contact, and the other half is a magnet. When the magnet is within 13 mm (0.5"), the reed switch closes, completing the circuit. ...
Reed Switch - Insulated
An insulated reed switch that closes when exposed to a magnetic field and opens when the field is removed. The encapsulated design is more durable than glass reed switches and can be easily populated on a PCB. Key Features Magnetic Activation – Non-contact switching via magnetic field 1 A Max...
Standard mini Reed Switch Module
A compact reed switch module that closes its circuit when a magnetic field is present. Inside the glass envelope, a pair of ferromagnetic metal contacts come together when a magnet is brought close, and spring apart when the magnet is removed — providing a simple, contactless switching mechanism....
LilyPad Reed Switch
The LilyPad Reed Switch is a simple breakout for a reed switch that will make it easy to use in e-textiles circuits in exactly the same manner that you can currently use the LilyPad Button and Switch. In order to make it more durable for wearable use, we’ve used a different style of reed switch, ...
OCTOPUS Magnetic Switch
OCTOPUS Magnetic Switch is a kind of electric brick carrying magnetic switch and compatible with OCTOPUS series. It mainly consists of WBSF12 dry reed switch. WBSF12 is a dry reed tube with frequently open contact point. When magnet come close to a certain distance,switch within WBSF12 will cl...
Weather Meter Kit
This Weather Meter Kit provides the three core sensors for a DIY weather station: an anemometer (wind speed), a wind vane (wind direction), and a rain gauge. All three sensors use passive magnetic reed switches rather than active electronics, making them simple to interface with any microcontroll...
Reed Switch
This is a small device called a reed switch. When the device is exposed to a magnetic field, the two ferrous materials inside the switch pull together and the switch closes. When the magnetic field is removed, the reeds separate and the switch opens. This makes for a great non-contact switch. ...
Wind Vane
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This wind vane is used to indicate the direction from which the wind is blowing. Inside the vane are eight switches, each paired with a unique resistor, allowing a microcontroller to read direction based on the vane’s position.As the vane rotates, a magnet closes the reed switches. In some positi...
Spare part (outdoor unit) for Professional Wireless Weather Station
This spare outdoor unit set is designed for use with professional wireless weather stations, providing the essential sensors needed to accurately monitor local weather conditions. Ideal as a replacement set or for custom weather station projects, it delivers reliable measurements of wind, rainfal...
ScoutMakes DRV5032 Digital Hall Effect Sensor Breakout
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Add magnetic sensing to your project with this breakout built around the Texas Instruments DRV5032 digital Hall effect sensor. Its digital output changes when the magnetic flux density threshold is crossed, making it useful for detecting magnets, position, lids, doors, rotations and other simple ...
Magnet Square - 0.25
These are small rare earth magnets - 0.25" cubed. Composed of Neodymium/Iron/Boron (NdFeB), these magnets are curiously strong and make for a great way to attach tools to a metal workbench, hold small children to a fridge, and as a trigger for reed switches. Activates the reed switch (shown belo...
Magnet Square - 0.125
These are very small rare earth magnets - 0.125" cubed. Composed of Neodymium/Iron/Boron (NdFeB), these magnets are curiously strong and make for a great way to attach tools to a metal workbench, hold small children to a fridge, and as a trigger for reed switches. Don’t let the photo fool you - t...
Metal Latching Pushbutton Switch with White LED Ring - 16mm
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This heavy-duty metal pushbutton is a compact panel-mount latching switch with an illuminated white LED ring. It gives custom panels, enclosures and interactive projects a clean, rugged interface for basic on/off control.The switch is SPDT and latching, so pressing it changes the circuit state, t...
Cherry MX2A Brown Tactile Keyswitch
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This tactile mechanical switch is suited to custom keyboards, keyboard repairs and embedded human-machine interfaces where you want clear physical feedback without the extra sound of a clicky switch. The Brown-style feel provides a noticeable tactile bump while remaining non-clicking.The MX2A gen...
Micro:bit Explorer's Kit
Note: This is the new version of our Micro:Bit 24 Bit kit and has been updated for the new Micro:Bit V2! The Little Bird Micro:bit Explorer's Kit includes more than 24 tutorials that teach you both how to use the micro:bit with various sensors and electronics with real-world applications. Acces...
