Magnetic contact switch (door sensor) : ID 375 : $3.95 : Adafruit Industries, Unique & fun DIY electronics and kits
INNO PUSH Elevator Door Contact Switch, For LIFT DOORS
Contact switch – GoWesty
Low Contact Switch | METROL | MISUMI India
Sliding Door Contact Switch Fit Car Van Alarm Central Locking Systems : Amazon.co.uk: Automotive
Amada - Contact Switch E08870 (OEM: 35030304), Electrical | Alternative Parts Inc
China magnetic door contact switch manufacturers, magnetic door contact switch suppliers, magnetic door contact switch wholesaler - Ningbo Sentek Electronics CO.,Ltd
THE STUFF THAT MAKES YOUR STUFF WORK: Contact Switch - The Solid Signal Blog