Proximity detection device for protection of personnel against e

Proximity detection system and oscillator

Proximity detection system and oscillator, and method of using s

Proximity detection system with digital frequency variation dete

Proximity detector

Proximity detector

Proximity detector between a metallic mass and an element to whi

Proximity detector employing a crystal oscillator

Proximity detector for night vision goggles shut-off

Proximity detector with rapid reception amplification

Proximity monitoring apparatus employing encoded, sequentially g

Proximity monitoring apparatus employing encoded, sequentially g

Proximity monitoring communication system

Proximity monitoring system

Proximity monitoring system and associated methods

Proximity sensor

Proximity sensor

Proximity sensor

Proximity sensor

Proximity sensor which is sensitive to a pulsating magnetic fiel