Glass Reed Switch Normally Open (N.O.) – Easy Magnetic Sensing for DIY Projects

Magnetic Reed Switch: Simple On/Off Control

Looking for a reliable way to detect magnets in your next project? This Glass Reed Switch Normally Open is an easy-to-use solution for magnetic sensing. With its normally open (N.O.) contacts, the switch closes instantly when a magnet is nearby—perfect for countless home, hobby, or school applications.

Easy to Use in Everyday DIY Projects

This miniature magnetic reed switch is great for door alarms, window sensors, robot projects, model trains, or smart home devices. Just connect it to your circuit—no complicated setup required! Its compact body (14mm long, 20mm lead length) fits into tight spaces, making installation a breeze.

Technical Details – Meder KSK-1A66-1020

• Type: Normally Open (N.O.) Glass Reed Switch
• Model: Meder KSK-1A66-1020
• Contact Type: Mercury-wetted
• Body Length: 14mm
• Lead Length: 20mm
• Maximum Contact Rating: 10W
• Maximum Switching Voltage: 200V DC
• Maximum Switching Current: 0.5A
• Initial Contact Resistance: ≤ 200mΩ
• Minimum Breakdown Voltage: 200V DC
• Insulation Resistance: ≥ 10 GΩ
• Capacitance: 0.2pF

Key Benefits

• Simple activation: Detects magnets instantly—no programming needed
• Easy installation: Small size with flexible 20mm leads
• Wide compatibility: Works with low-voltage and hobby circuits
• Reliable performance: High insulation resistance and durable mercury-wetted design

Important Notes & Safety

• Contains mercury—handle with care and do not break the glass body.
• Not recommended for applications with repeated shock/vibration.
• Sold as one switch (QTY: 1).

Get dependable on/off magnetic detection with this glass reed switch N.O.—perfect for your next build, repair, or custom electronics project!