Thomas is an external lightning protection that is very reliable to protect building strike. Thomas lighting protection electrostatic and membrane sistem operated based on the ionic from plasma that produces streamer to drive away the lightning strike.

Thomas New EMSY lightning Protection system consist of: 
1. AIR TERMINATION SYSTEM performs as an arrestor of lightning strike point to the earth in order to protect the protective zone from lightning strike hazards.
2. DOWN CONDUCTOR only one down cable performs to conduct lighting current captured by air terminator to the earth.
3. EARTH TERMINATION SYSTEM performs to spread the electric current as a result of lightning to the ground, where the grounding electrodes are in connection with conductor.

Thomas System Memiliki 3 ( tiga) variasi type berdasarkan cakupan jangkauan proteksi

- Radius 125 meter yang bisa melindungi luas area sampai dengan 49.062 meter persegi.
- Radius 60 meter yang bisa melindungi luas area sampai dengan 11.304 meter persegi.
- Radius 25 meter yang bisa melindungi luas area sampai dengan 1.962 meter persegi.

Spesification :
 
Size ( approx) : 38.5cm ( 15.4 " ) 
Weight in kilo : 3850gr
Lenght : 38.5cm
Wide : 10.16cm ( 4 " ) 
Plate : 3x2 cm ( 0.8 " ) x 0.5cm ( 0.2 " ) 
Cage : 3xd4mm persegi
Colour : Black & Chrome