Instruments from university laboratories of the 20th century

temporary exhibition open from 13th September 2012 until 26 November 2012

analitycal
electrical

Laboratory balances



Balnce is one of the basic tools at the work of the chemist. It uses less accurate technical scales as well as precise analytical balances that allow weighing with accurace up to 0,0001g. An important element in the technical development of high-precision analytical balances is automatic weight set. Initially balances required manual application of weights, stored separately in special boxes. At the end of nineteenth century a mechanical system of imposition of weights stored on the special construcion inside the balance was developed. Currently, analytical electronic balances are in use.


analitycal balance

Analytical balance

England, late 19th century
Weight with long arm and manual weight set. One of the oldest type of analytical balances produced between 1847 and 1920.
Given by the Faculty of Chemistry UJ
fot. Grzegorz Zygier
waga torsyjna

Torsion balance

Techniprot, Pruszków, 1981
Analytical laboratory balance to draw weighed amounts, range 0-500 mg and accuracy 1 mg.
Given by the Department of Neurophysiology and Chronobiology UJ
fot. Grzegorz Zygier
waga torsyjna

Torsion balance

Zakłady Mechaniki Precyzyjnej MERA-WAG, Gdańsk, Poland, 1980th
Technical balance with an accuracy of 1g. It does not require the use of weights. The deformation of the helical spring, which is attached to the arm of the pan is measured.
Given by the Department of Cell Biology and Imaging UJ
fot. Grzegorz Zygier
ZMP

Analytical balance

Zakłady Mechaniki Precyzyjnej, Gdańsk, 1971
Weight with automatic weight set, range 0-200g.
Donated by the Department of Neurophysiology and Chronobiology UJ
fot. Grzegorz Zygier