The Model: SD-1 is a smart transmitter / gas detector head that uses a state of art instrument housed in a flameproof enclosure. It is specially designed to measured combustible gas in the presence of Hydrogen or Acethylene. It is compact in size, weighing only 1.9kg. The SD-1 can be installed and wired up easily without any additional accessories needed as compared to a conventional one. Maintenance will be done easily with a magnetic key without having to open the lid in any ex-proof environment.