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Analytical Balances

Analytical balances are high-precision scales with a capacity of typically 200 grams and a resolution of 0.1 milligram. Before the advent of single-pan balances this meant classical twin-pan design with or without a variety of auxiliary devices such as damping, rider mechanisms, weight loading, optical projection, and others to speed up weighing and increase resolution. The pictures below give an overview of Stanton's output from this category.

The earliest known Stanton balance, serial number 239. Made in 1946 or 47, no model given but probably a forerunner of the CB series.

The beam of s/n 239.

A model CB3 (Chemical Balance). This series included simple free-swinging (undamped) balances without optical projection. 200 g capacity, 0.1 mg resolution.

Model AD2, the workhorse early analytical balance. 200 g capacity by 0.1 mg resolution (optical), air-damped and weight-loaded to 1 g.

The beam of an AD2.

Model AD3, nearly identical to the AD2 but only 1 decade of weight-loading, achieving 0.1 mg resolution over a 100 mg optical range.

The beam of the AD3.

Model BA6, the top-of-the-range analytical balance. 200 g capacity by 0.1 mg resolution (optically), fully weight-loaded over 4 decades.

The beam and weights of the BA6.

Model BA9, later version of the BA6 with only 3 decades weight loading and wider optical range.

The beam and weights of the BA9.

Model A42, analytical balance with 200 g capacity and 0.1 mg optical resolution. By the end of the 1950's, grey painted cases had displaced the mahogany finish. Basically a modern verion of the AD2.

The beam of the A42.

Model A43, the modern counterpart of the AD3.

The beam of the A43.

Model B19. Analytical balance with 200 g capacity and 0.1 mg resolution, fully weight-loaded. Modern equivalent of the BA6...9 models.

The beam of the B19.

Model C26, a student's balance. 200 g with 0.1 mg resolution by pointer and chart. No weight-loading but a rider mechanism.

My very first balance.

The beam of the C26.