4440004 Potter BMC-33B 1 3/8" to 3" Gap High Security Double Biased Balanced Contact Switch with 24 Foot Stainless Steel Armored Cable

The BMC-33B Anti-Defeat Magnetic Contacts are uniquely designed and constructed to make defeating almost impossible. The switch housing contains specially arranged reed switches. These reed switches are pre-set in a biased format with ring magnets, producing a symmetrical magnetic field. The magnetic layout is designed with a combination of three polarized magnets. This switch and magnetic combination produces a perfect symmetrical magnetic field in a balanced condition, as if no magnet field existed. Any attempt to bypass or defeat the BMC-33B with an external magnet will cause the magnetic fields to be imbalanced, thus causing an alarm condition.

• Contact Rating - 3VA
• Contact Type - N.O./N.C.
• Max. Carry Current - .5 Amp
• Max. Switching Current - .5 Amp
• Breakdown Voltage - 200VDC Min.
• Operating Gap - 1 3/8” to 3”
• Mounting Method - Screws
• Operating Temperature Range - 32°F to 120°F (0°C to 49°C)

4440004 Specifications PDF