Selenium (photovoltaic) exposure meter for microscopes. Inserted in eye piece position to take a reading, which is then converted to exposure settings using the rotational calculator provided. c1950s. Used by Commonwealth Serum Laboratories (CSL) Limited, Parkville, Victoria.

Physical Description

Oblond dark wood box, varnished, housing black apparatus. Meter is black oblong, with two knobs and a flat raised section at the top housing the meter gauge. Black disk-shaped reader on a length of black cord connecting it to the meter. Black, flat square disk photovolt exposure calculator, with rotational gauge, inserted into custom slot in lid of box.


Example of equipment used at CSL

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