The SH-7 tube heater is the new generation in tube heater technology. The SH-7 is faster, lighter, smaller, and more versatile than previous designs. A mode switch allows selection of the appropriate heat cycle for 60mm single fiber sleeves, 40mm single fiber sleeves, mass fusion splice sleeves, and also for new micro protection sleeves. A heating time switch allows adjustment for ambient conditions. The SH-7 is designed to withstand tough outdoor field conditions and may be operated in temperatures of -10¡C to +50¡C, and cross winds of more than 30mph.