The pictured dials are part of a Beckman DPM-100 Liquid Scintillation System. This photograph was incorporated into a composite image featuring a Helipot potentiometer.

Potentiometers regulate the flow of electricity, like the volume dial on a radio. In 1940, Arnold O. Beckman was unsatisfied with dials on the market, so he designed his own helical potentiometers, or helipots, for use…

Based on the orientation of the inscription, the RBD is the dark dial, the 2600 the small dial, and the RB the large, light dial.

Potentiometers regulate the flow of electricity, like the volume dial on a radio. In 1940, Arnold O. Beckman was unsatisfied with dials on the market, so he designed his own helical potentiometers, or helipots, for use…

The included reports are "The Pauling Oxygen Meter" by Reuben E. Wood and David P. Shoemaker, 1944; "Final Report Contract Nonr 388(00): Research Covering Develpment of an Onoxia Warning Device for Use in High-altitude…

This letter regards the use of oxygen meters on submarines and in hospitals, issues of cost and portability, and the Naval Research Laboratory's interest in detecting other gases.

Developed from a Linus Pauling design…

The letter regards the development of Models K and L oxygen meters, recommendations for which are ready for further testing by the National Defense Research Committee, and a note that some are unsuitable due to…

Arnold Beckman informs J. H. Rushton that the Model G oxygen meter is ready for testing, but the Model F is not. An order has been received from the Linde Company, but not fulfilled, and an experimental instrument was…

In this letter, J. H. Rushton of the National Defense Research Committee requests an update on the status of F and G model oxygen meter instruments.

Developed from a Linus Pauling design during WWII, the technology…

The dedication ceremony pictured in several images in this set was held in 1956, when the building reached its ultimate height and trees were lifted to celebrate the construction milestone. Other photographs depict the…

Photographs depict Beckman Instruments' first overseas facility and views of the company's Freimanerstrasse property prior to commencement of construction in 1956.

In 1954, Beckman Instruments' headquarters moved from Pasadena to Fullerton.

Various photographs bear numbers, production notes, and photographer's stamps.

In 1954, Beckman Instruments' headquarters moved from Pasadena to Fullerton.

Most photographs are unattributed; several have image numbers or production notes written on the reverse.

The office pictured was in Arnold Beckman's home; he was 93 when the photograph was taken. The two color photographs were taken during his 90th birthday celebration.

Dr. Arnold O. Beckman (1900-2004) invented the first…

Dr. Arnold O. Beckman (1900-2004) invented the first commercially successful electric pH meter in 1934 and thus began a long career manufacturing scientific and medical instruments with National Technical Laboratories,…

Arnold Beckman with George Fenniman, Charles Thomas, and unidentified individuals at an Eagle Scout dinner. Based on the décor, the photographs of Beckman and the Boy Scout were taken in Beckman's office.