Reed Switch Sensor - Normally Open Magnetic Switch CDN-0717
Reed Switch Sensor – Normally Open Magnetic Contact Switch (CDN-0717)
The Reed Switch Sensor (SKU: CDN-0717) is a magnetically actuated switch enclosed in a durable glass capsule. It closes its electrical contacts when exposed to a magnetic field, enabling non-contact switching for countless applications. Its simple, maintenance-free design makes it a staple in security systems, industrial sensors, and DIY electronics.
Key Specifications
| Specification | Value |
|---|---|
| Switch Type | Normally Open (NO) |
| Contact Rating | 10W max |
| Max Switching Voltage | 200V DC |
| Max Switching Current | 0.5A |
| Operating Temperature | -40°C to 125°C |
| Glass Length | 14mm |
What You Can Build With This
- Door or window open/close sensor for home security
- Magnetic proximity detector for robotics
- Counting mechanism for rotating objects with magnet attachment
- Liquid level sensor using a floating magnet
Compatibility
This reed switch integrates easily with any microcontroller or digital logic circuit. It behaves like a standard push button: open when idle, closed when a magnet is near. Commonly used with Arduino Uno, ESP32, Raspberry Pi GPIO, and 555 timer circuits for sensing tasks. Simply configure a digital pin with an internal pull-up resistor or add an external 10kΩ resistor to read its state. No additional power or complex circuitry is required.
Wiring Notes
Connect one lead of the reed switch to ground and the other to a digital input pin with a pull-up resistor to VCC. When a magnet is brought near, the switch closes, pulling the pin LOW. Ensure the current through the switch does not exceed 0.5A; for higher loads, use a relay or transistor.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino?
Yes, it works like a regular switch. Connect between ground and a digital pin with internal pull-up enabled for easy reading.
What magnet strength is needed?
A small neodymium magnet (e.g., N35) placed within 10-15mm will reliably activate the switch. Larger gaps may need stronger magnets.
Can it switch AC loads?
The reed switch is rated for DC up to 200V, but for AC mains switching, use a relay driven by this sensor instead.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items