Standex Electronics

GR400 Series miniature 10-mm reed switch has 0-10 W of rated power, a switching voltage of zero to 180 Vdc/Vac, 0.5 A maximum switching current and 0.8 A maximum carry current...

Alarm combines audio and visual alerts, built around magnetic reed switches that sense without contact

Switch is 0.379 in. long with a 0.098 in. diameter