National Physical Laboratory Video Presentations on Temperature Measurements

  New references for high temperature measurements As a culmination of an eight-year research programme an international collaboration has developed robust reference fixed points, studied their sensitivity to impurities and external conditions and finally measured their melting transition temperature. This talk describes how 100+ measurements made by nine different NMIs have been combined to assign low-uncertainty thermodynamic temperatures to the melting transition of Re-C, Pt-C and Co-C metal-carbon eutectics. At the simplest level, these fixed-points will provide new temperature references for the calibration of pyrometers at temperatures above the freezing point of silver (1234.93 K) and will thus reduce the … Continue reading

New references for high temperature measurements

Summary of work reported for high temperature measurements from NPL As a culmination of an eight-year research programme an international collaboration has developed robust reference fixed points, studied their sensitivity to impurities and external conditions and finally measured their melting transition temperature. This talk describes how 100+ measurements made by nine different NMIs have been combined to assign low-uncertainty thermodynamic temperatures to the melting transition of Re-C, Pt-C and Co-C metal-carbon eutectics. At the simplest level, these fixed-points will provide new temperature references for the calibration of pyrometers at temperatures above the freezing point of silver (1234.93 K) and will … Continue reading

Acoustic Gas Thermometry Review Article

Online  —  Acoustic gas thermometry (AGT) is not a very well known temperature measurement technique; several have been reported in the past. This featured review article in Metrologia (Acoustic gas thermometry M R Moldover et al 2014 Metrologia 51 R1) by six authors from six different  NMIs around the world provides a modern update on the technology and its significance in helping determine values of physical reference temperatures points on the International Temperature Scale of 1990 (ITS-90). Acoustic Gas Thermometry Authors: M R Moldover1, R M Gavioso2, J B Mehl3, L Pitre4, M de Podesta5 and J T Zhang6 Review … Continue reading

Temperature Calibration & Metrology Web Seminar Archives

Fluke Calibration’s Focus on Basics – RTDs – Digital & IR (Infrared Radiation) Thermometers Online —  Fluke Calibration’s free online web seminars cover a wide range of calibration and temperature topics. More are scheduled monthly. To learn about upcoming events, check their web seminar page, or sign up for their e-news bulletins today. If you have missed out on one of their live web seminar events, you can view the recordings in their web seminar archives. Here’s a list of current ones along with links to them (as of 1 August 2013). They are mostly in English, but several are … Continue reading

Temperature Measurement – Lecture 9

“The Science & Art of Temperature Measurement” The first Lecture in Module 2, on the first topic of the Mechanical Measurements and Metrology, a part of the course from the Indian Institute of Technology Madras, India – online at youtu.be/GNOI_7ftbQ0. It assumes an educational level of at least first year college engineering or higher, Some of the topics in this series of lectures also assume some knowledge of prior lectures in the Series (see below). This is but one of the 50 videos in this course. A full list of the course contents is below. The courses related to temperature … Continue reading

Calibrating Ordinary Thermometers

This six-minute video by AquaLab captures the correct way to check, verify and if necessary, adjust some ordinary thermometers using an ice bath. Most people think that it’s easier to do so at the boiling point of water, but the ice point (very nearly 0.01 ° C at all normal atmospheric pressures) is far more stable than the boiling point that varies considerably with atmospheric pressure and consequently the altitude of the location at which the measurement is made. What’s more, the ice point was, until about 1990, the fundamental reference point for the Centigrade and Fahrenheit scales. However, when … Continue reading

Temperature (T)-Bob Abel on YouTube

Dr. Bob Abel of Olympic College in Bremerton, Washington (USA) has a series of YouTube videos that we think are very well done. His low-key and sometimes humorous approach to the basics of science and temperature, as concepts, and how some temperature sensors work, are some of the cleverest and most viewer-friendly ones we’ve seen to date. Below are his two brief presentations on temperature and scale/unit conversions in lumps of about 5 to 7 minutes each. There are many more at www.youtube.com/olympiccollege. First: … Continue reading