Potter PSW-21 3/8" Plunger Switch

Built for reliable contact monitoring in security and surveillance applications, the Potter Electric Signal, LLC PSW-21 plunger switch delivers consistent input to alarm, access control and monitoring systems. This plunger-style switch is designed for recessed mounting in a 3/8" drilled hole, providing a low-profile, tamper-resistant contact point that keeps installations neat and secure. With 25" #22 lead wires, installers gain flexible wiring reach for quick integration into panels and control circuits. The PSW-21 offers precise actuation — 3 mm pre-travel and a 7 mm overall operating stroke — and a modest 100–200 g operating force to reduce mechanical stress and extend service life. Ideal for door contacts, cabinet alarms, and auxiliary monitoring points, this plunger switch balances compact form with dependable performance in demanding environments. Specify the PSW-21 when you need a simple, durable plunger switch that supports consistent surveillance and security operations. Add it to your next installation to improve detection reliability and streamline wiring.

• Reliable contact monitoring for security and access control systems
• Compact 3/8" recessed mount that fits standard drilled holes for discreet installation
• Long 25" #22 leads for flexible wiring and easy panel connection
• Positive actuation with 3 mm pre-travel and 7 mm overall stroke for precise detection
• Low operating force (100–200 g) minimizes wear for long-term durability