32mm Reed Switch NO NC 3 Pin

A reed switch is a switching component that is activated by a magnetic field. It contains metal reeds inside a glass tube, which either come together or separate in the presence of a magnetic field.

📐 Dimensions:

• Length: 32 mm (glass tube part)
• Number of pins: 3 pins (typically Common (COM), Normally Open (NO), Normally Closed (NC))
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⚙️ Working Principle:

• When a magnet approaches, the internal reeds react to the magnetic field and either close or open the circuit.
• In 3-pin versions, it usually works as follows:
  • Middle pin: Common (COM)
  • One side pin: Normally Open (NO)
  • Other side pin: Normally Closed (NC)
• This allows detection of both the presence and absence of a magnetic field with different output signals.

⚡ Electrical Specifications:

• Max switching voltage: Typically up to 100V DC (may vary by model)
• Max switching current: Around 0.5A
• Max carry current: Around 1A (on some models)
• Switching time: Very fast (in the range of milliseconds)

🧲 Applications:

• Security systems (door/window sensors)
• Counters
• Automation systems
• Bicycle speedometers
• Arduino and other microcontroller projects

⚠️ Things to Note:

• Fragile due to its glass tube construction – handle with care during installation.
• Trigger sensitivity may vary depending on magnet orientation and distance.