The Net Safety Millennium SC310 Catalytic Bead Combustible Gas Sensor provides versatile, robust and field proven performance in a rugged package designed for the most extreme industrial environments. For all flammable gas types, % LEL gas detection is fast and reliable with simplified field serviceability using the Net Safety Millennium II Basic (M2B) Universal Gas Transmitter, Net Safety Millennium II (M21) Single Channel Universal Gas Transmitter or Net Safety Millennium II (M22) Dual Channel Universal Gas Transmitter.