SOLO Swiss – Atmosphere furnaces for metal heat treatment

Industrial furnaces

Heat treatment of metals

About us

SOLO Swiss SA, founded in 1924, manufactures advanced industrial furnaces for the heat treatment of metals. The headquarters are located in Bienne, close to Bern in Switzerland and maintain manufacturing facilities in Porrentruy, Switzerland and in Guangzhou, China.

SOLO Swiss is one of the oldest furnaces manufacturer in Europe and exports its equipment all over the world including vigorous activity in China.


SOLO was founded in 1924 by Mr. Käsermann and Mr. Sperisen.

SOLO is still a family owned company, managed by the third generation.


SOLO Swiss manufactures advanced industrial furnaces for the heat treatment of metals since 1924. SOLO Swiss offers atmosphere furnaces, batch furnaces, bell-type furnaces, continuous furnaces, mesh belt furnaces used in variety of heat treatment processes: carburizing, hardening, tempering, annealing, austempering, nitriding, brazing, carbonitriding, sintering, nitrocarburizing, oxinitriding, quenching.

Bell-type furnace SOLO Swiss Profitherm

Continuous furnace SOLO Swiss 322

Continuous furnace with online quenching SOLO Swiss 302


  • Tests for study, development or pre-production
  • Assistance and metallurgical expertise
  • Process optimization: improvement of material properties, increased productivity, reproducibility, definitions of heat treatment ranges
  • Reduction of consumption and emissions
  • Compliance (safety and environment)


  • Maintenance and Retrofit all over the world
  • Original SOLO and Borel spare parts
  • SOLO & Borel original drawings and technical documents since 1950
  • Renovation and alignment on NADCAP, ATEX, AMS standards


More than 20,000 SOLO Furnaces sold all over the world since 1924

And about 25,000 Borel Furnaces since 1927