The MAGNASPHERE MSS line of security sensors provides a solution to all of the weaknesses and flaws of the reed switch contacts.
Security Sensors | Magnasphere | MSS-09CL
Tamper Proof Concealed Security Sensors | MAGNASPHERE MSS | MSS–19C
Security Sensor - Magnasphere HSS L2C series
Magnetic Proximity Sensing Security Switch | Magnasphere
Magnasphere MSS Wireless Security Sensor | Electronic Components
Magnasphere L2 Series HSS® UL634 Security Sensor for Alarms/Sirens
Magnasphere MSS-300 Series Contacts for Alarms/Sirens