Thermocouple

Thermocouple stands in Linz, Austria, within Forum Metall, an open-air ensemble of modern sculptures beside the Danube. Piotr Kowalski created this steel work in 1977 for a setting where art meets industry. The surrounding park brings large-scale abstract sculpture into public space, reflecting Linz’s history of steelworking and manufacturing.

Chrome-nickel steel and OR 37 join through molecular bonding during a high-temperature rolling process. Two steel plates respond physically when surrounding temperatures change. At zero degrees Celsius, the plates stand parallel, while heat or cold sets them moving. That response refers to a thermocouple, whose different metals generate voltage when temperatures differ. Forum Metall opened in 1977 alongside the fourth Bruckner Festival, with works designed specifically for Linz and made in Austrian workshops.

Kowalski’s sculpture makes temperature visible through metal, joining scientific principle with artistic form. The nearby Lentos Kunstmuseum Linz holds the work, while the outdoor ensemble remains part of the city’s everyday landscape.