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OWM Info Hours: OWM Study Results on the Use of Portable Digital Density Meters as Field Inspection Devices

The NIST Office of Weights and Measures (OWM) hosts a series of Information Hours, or "Info Hours," that feature insights on topics relevant to legal metrology and documentary standards through an informal technical discussion and Question and Answer forum. In this recording, NIST OWM's Diane Lee and International Guest Researcher Ombati Nyang'au present the results of a NIST OWM study on the use of portable digital density meters (PDDMs) as field inspection devices. The discussion includes a basic explanation of how to measure and determine liquid density with portable digital density meters; a review of the preliminary study results of the NIST OWM comparison study of liquid density measurements using PDDMs and the gravimetric method typically used in inspections; and an examination of the impact of using PDDMs in liquid package inspections compared to the gravimetric method. 

Instructors: Diane Lee/NIST and Wilson Ombati Nyang’au/Kenya Bureau of Standards and NIST OWM International Associate

Moderator: David Sefcik/NIST

Video Editor: Jennifer Lee/NIST

Event date: September 18, 2025

About this Dataset

Updated: 2026-09-19
Metadata Last Updated: 2026-05-01 00:00:00
Date Created: N/A
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Title OWM Info Hours: OWM Study Results on the Use of Portable Digital Density Meters as Field Inspection Devices
Description The NIST Office of Weights and Measures (OWM) hosts a series of Information Hours, or "Info Hours," that feature insights on topics relevant to legal metrology and documentary standards through an informal technical discussion and Question and Answer forum. In this recording, NIST OWM's Diane Lee and International Guest Researcher Ombati Nyang'au present the results of a NIST OWM study on the use of portable digital density meters (PDDMs) as field inspection devices. The discussion includes a basic explanation of how to measure and determine liquid density with portable digital density meters; a review of the preliminary study results of the NIST OWM comparison study of liquid density measurements using PDDMs and the gravimetric method typically used in inspections; and an examination of the impact of using PDDMs in liquid package inspections compared to the gravimetric method.  Instructors: Diane Lee/NIST and Wilson Ombati Nyang’au/Kenya Bureau of Standards and NIST OWM International Associate Moderator: David Sefcik/NIST Video Editor: Jennifer Lee/NIST Event date: September 18, 2025
Modified 2026-05-01 00:00:00
Publisher Name National Institute of Standards and Technology
Contact mailto:[email protected]
Keywords Info Hours , inspections , liquid density , NIST Handbook 133 , OWM , portable digital density meter , SP 2200 , study , weights and measures
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