Description: The DU Series Spectrophotometer is a microprocessor- controlled spectrophotometer intended for use in quantitative and qualitative biological. The Beckman DU Spectrophotometer is an efficient stand alone system that comes with complementary accessories to produce accurate results. Beckman DU UV/Vis Scanning Spectrophotometer. This refurbished DU Spectrophotometer unit; PDF Manual; Mouse; Power cord.

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Equipment Information

It came from Brazil, and was in demand for wartime radio oscillators. This amount is subject to change until you make payment.

Read more about the condition. Do not turn off the DU unless told to by your instructor. Moving from a prototype to production of the Model D involved challenges.

The DU Series operates in the wavelength range of to nm. The last DU spectrophotometer was produced on July 6, The New York Times. It used a linear shuttle with four positions, and a superstructure to change the knobs.

Instrumentation for a better tomorrow: It used a tungsten light source with a glass Fery prism as a monochromator.

Coleman Instruments had recently coupled a pH meter with an optical phototube unit to examine the visual spectrum the Coleman Model DM. Tungsten lamps were useful in the visible light range but gave poor coverage in the ultraviolet range.


The mechanism was highly sensitive and required a skilled operator. Learn More – opens in a new window or tab Any international shipping is paid in part to Pitney Bowes Inc. Return to the “File Utility” program before attempting to open your data file. Links on landing page go to full documents.

An item that does not function as intended and is not fully operational. The orientation of the stage is critical!

Beckman series manuals here; | Hach Company/DU Questions and Answers on LabWrench

Subject to credit approval. This includes items that are defective in ways that spectrophhotometer them difficult to use, items that require service or repair, or items missing essential components. Any international shipping and import charges are paid in part to Pitney Bowes Inc. He further demonstrated that the relative amounts of guanine, cytosine, adenine and thymine varied between species. Warranty is only for 14 day DOA guarantee for full refund less shipping, buyer pays return shipping.

Working in the “file” “open” dialog box search for: A tangent bar mechanism bec,man used to adjust the monochromator. Sign up for newsletter. This enables the ratio, transmittanceto be obtained. The DU spectrophotometer was also used for critical analysis of hydrocarbons. In Berl, Walter G. Watsondiscussing his findings with them. The DU spectrophotometer was also an important tool for scientists studying and producing the new wonder drug penicillin.

The DU spectrophotometer was extensively used in the mass production of penicillin. Report item – opens in a new window or tab. Shipping rate provided is for all 48 contiguous states, unless stated otherwise.


New user MUST be trained by the captain or present users 2. D you switch a lamp on, allow the machine to warm up for a half-hour before use.

Beckman DU-640

Refund will be processed within 7 business days through PayPal upon arrival of merchandise. Beckman DU Spectrophotometer Condition: If you have to turn on the DU, the main power switch is located on the rear of the instrument.

Forensic Views of the Body”. National Institutes of Health. Beckman had to obtain a wartime priority listing for the spectrophotometer to get access to suitable quartz supplies. I reserve the right to reject item after inspection i. After Beckman went electronic back in the late 90’s, very little changes were ever made to the paper copies unless a new run of manuals needed to be made for training purposes and NONE of the service manuals EVER included service updates of any kind so you’re still missing out on the most important information that was released about the product.

Request a Quote Add to watch list. If so, do not bid on this item unless you are an authorized purchaser. Organic chemist and philosopher of science Theodore L. When RCA could not meet Beckman’s demand for experimental phototubes, National Technical Laboratories again had to design its own components in-house. In contrast, examining a food sample with a DU spectrophotometer yielded better results in a matter of minutes.