# Brookfield Engineering > Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Brookfield_Engineering > Markdown URL: https://mediated.wiki/source/Brookfield_Engineering.md > Source: https://en.wikipedia.org/wiki/Brookfield_Engineering > Source revision: 1315046148 > License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) **Brookfield Engineering** is an engineering and manufacturing company with headquarters in [Middleboro, Massachusetts](/source/Middleboro,_Massachusetts). It is a subsidiary of the conglomerate [Ametek](/source/Ametek). Its product line includes laboratory [viscometers](/source/Viscometer), [rheometers](/source/Rheometer), texture analyzers, and powder flow testers as well as in-line process instrumentation. These instruments are used by research, design, and [process control](/source/Process_control) departments. ## History The company was established in 1934 by Don Brookfield Sr., who graduated from [MIT](/source/MIT) with a degree in [electrochemical engineering](/source/Electrochemical_engineering). Brookfield Engineering was a family-run business until 1986, when it became an [ESOP](/source/Employee_stock_ownership_plan) company. It has been [ISO](/source/ISO) certified since the 1990s. Brookfield Engineering has dealers in 60 countries and regional offices in the US, UK, Germany, India and China. All manufacturing is located in the US at company headquarters.[1] ## Operation Classical Brookfield viscometers employ the principle of rotational viscometry—the [torque](/source/Torque) required to turn an object, such as a spindle, in a fluid indicates the viscosity of the fluid.[citation needed] Torque is applied through a calibrated spring to a disk or bob spindle immersed in test fluid and the spring deflection measures the viscous drag of the fluid against the spindle.[2] The amount of viscous drag is proportional to the amount of torque required to rotate the spindle, and thus to the viscosity of a Newtonian fluid.[1] In the case of non-Newtonian fluids, Brookfield viscosities measured under the same conditions (model, spindle, speed, temperature, time of test, container, and any other sample preparation procedures that may affect the behavior of the fluid) can be compared.[3] When developing a new test method, trial and error is often necessary in order to determine the proper spindle and speeds. Successful test methods will deliver a % torque reading between 10 and 100.[4] The [rheological](/source/Rheological) behavior of the test fluid can be observed using the same spindle at different speeds, but because the geometry of the fluid around a rotating bob or disk spindle in a large container does not allow a single [shear rate](/source/Shear_rate) to be assigned, proper rheometry is not feasible using this setup. Apart from its rotating bob viscometers, Brookfield now also produces defined-geometry rheometers which allow complete rheological analysis of fluids.[5] ## See also - [ASTM International](/source/ASTM_International) - [Bulk density](/source/Bulk_density) - [Deutsches Institut für Normung](/source/Deutsches_Institut_f%C3%BCr_Normung) - [Food Rheology](/source/Food_Rheology) - [Mouthfeel](/source/Mouthfeel) - [Rheology](/source/Rheology) ## References 1. [Brookfield Engineering - Company History](http://www.brookfieldengineering.com/company/company-history.asp) [Archived](https://web.archive.org/web/20071231121619/http://www.brookfieldengineering.com/company/company-history.asp) December 31, 2007 at the Wayback Machine 1. ["Experiences in slag viscosity measurement by rotation cylinder method"](https://web.archive.org/web/20120402104022/http://files.instrument.com.cn/FilesCenter/20060411/21390.pdf). Archived from [the original](http://files.instrument.com.cn/FilesCenter/20060411/21390.pdf) on 2012-04-02. Retrieved 2011-09-12. 1. [The Rheology School – Brookfield Viscosity Explained](http://www.rheologyschool.com/brookfield_viscosity_explained.html) 1. [Brookfield Engineering – More Solutions to Sticky Problems](http://www.brookfieldengineering.com/download/files/more_solutions.pdf) [Archived](https://web.archive.org/web/20120324181951/http://www.brookfieldengineering.com/download/files/more_solutions.pdf) March 24, 2012 at the Wayback Machine 1. ["Laboratory cone and plate rheometer"](https://web.archive.org/web/20140301190046/http://www.brookfieldengineering.com/products/rheometers/laboratory-rs-cone-plate.asp). Brookfield Engineering. Archived from [the original](http://www.brookfieldengineering.com/products/rheometers/laboratory-rs-cone-plate.asp) on 1 March 2014. Retrieved 22 February 2014. --- Adapted from the Wikipedia article [Brookfield Engineering](https://en.wikipedia.org/wiki/Brookfield_Engineering) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Brookfield_Engineering?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.