These solar and terrestrial radiation instruments were technically well regarded. Business flourished as new products like the pyrano-albedometer and soil heat flux plate was added to the suite. The Middleton Instruments range of solar products gained rapid acceptance from the market and many instruments were exported to all parts of the world.

In the 1980`s the BWD group, as part of a company consolidation, purchased Middleton Instruments. Synchrotac Middleton Instruments traded for a number of years until Middleton was acquired by the current owner Carter-Scott Manufacturing Pty. Ltd. in 1990.

Middleton products have maintained their reputation for quality and reliability for over sixty years. With the expanded solar radiation line and further innovation to existing products, all Middleton products are now marketed under the `Middleton Solar` brand. The Middleton Solar manufacturing facility is located in North Geelong, which is nearby to Melbourne, Australia.

Middleton Solar and Carter-Scott Design are brands of Carter-Scott Manufacturing Pty. Ltd. Melbourne, Australia. A.B.N.55-006-486-988.

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