Potter RSW-21B-I Magnetic Contact, SPDT Roller Ball SWT, Ivory, Normally Closed/Open Loop

Deliver consistent, low-profile security monitoring where reliability matters most. The Potter Electric Signal RSW-21B magnetic contact roller ball switch is engineered for door and window detection in access control, alarm and surveillance systems. Its hardened 5/8-inch stainless-steel roller ball and durable construction stand up to frequent operation and corrosive environments, while the recessed design fits a standard 3/4-inch drilled hole for discreet, tamper-resistant mounting.

Specifically designed for integration with commercial alarm panels, the RSW-21B offers an SPDT configuration and normally closed/open loop options to match your system logic. With a short 3mm operating stroke and a 400–500 g actuation force, the switch provides predictable, low-bounce switching that improves monitoring accuracy and reduces false alarms. Long 22-inch and 25-inch leads simplify wiring during installation or retrofits.

Ideal for security integrators specifying sensors for access control, perimeter monitoring, or surveillance projects, the Potter RSW-21B combines durability and precise performance. Specify the RSW-21B for reliable door/window monitoring — contact us to order or to confirm compatibility with your alarm system.

• Provides reliable, low-profile door and window monitoring for commercial security and access control
• Hardened 5/8-inch stainless-steel roller ball resists wear and corrosion for long service life
• Recessed mount fits a 3/4-inch drilled hole for discreet, tamper-resistant installations
• SPDT configuration with normally closed/open loop flexibility simplifies integration with alarm panels
• Short 3mm operating stroke and 400–500 g actuation force deliver precise, consistent switching
• 22-inch and 25-inch lead lengths reduce installation time in retrofit and new-build projects