Life-Saving Technology "RFID tags trigger alarms if worker doesn't exit by scheduled time - prevents entrapment" "Explosion-proof readers for hazardous zones (Zone 1 certified)" "Real-time gas detection integration - auto-alerts when conditions turn dangerous" "Military-grade wireless signals penetrate 10m underground - zero dead zones" "Blockchain-secured attendance reco... https://exigasoftware.com.sg/confined-space-attendance-system/