Cyclops™ Infrared Thermometers-Update

An Update on the Handheld IR Thermometer line that took over from DFPs* The NEW Land Cyclops L family of high quality portable non-contact radiation thermometers provides spot temperature measurement with incredible accuracy and reliability. The Cyclops product line is still going strong after nearly 30 years! Features such as a precision view of the measurement target spot with simultaneous digital display of temperature in the viewfinder, choice of operating and calculating modes, digital output and out of range alarms are provided as standard. The Cyclops L family of non-contact portable thermometers introduce several new features to this instrument “dynasty”. … Continue reading

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

IMPROVING HUMIDITY MEASUREMENTS IN METEOROLOGY

A product with a unique advantage Air humidity and temperature play an important role in meteorology. Highly accurate measurements of these climate parameters form the basis of accurate forecasts and meaningful records. The E+E Elektronik Model EE33 series humidity and temperature sensor is the only one on the market with a double-heated probe. Both the sensor tube and the sensor element are heated. An application note, free for download from their website, tells the rest of the story. You can download it be clicking here. If that does not work, as sometimes happens when organizations “refine” their websites, we have … Continue reading

The Significance of Thermowells

Consider relevant factors and standards Online — In a May/June 2013 article in InTech Magazine “Basics of thermowell design and selection”, author Ehren Kiker describes why thermowells are important and how their key parameters can be determined for a particular use situation. The article begins: “When planning for a temperature measurement application, a fair amount of consideration is typically given to sensor selection (e.g., thermocouple vs. RTD) and wiring of the output (e.g., transmitter vs. direct wiring), and how these factors will affect the measurement. Often, by comparison, relatively little consideration is given to the mechanical components of the sensor … Continue reading

Wake Frequency Calculator by TempSens Instrument

Plus two additional Calculators An online resource calculator for estimating the Wake Frequency of a thermowell in a flowing stream. According to the website: “TEMPSENS WAKE FREQUENCY CALCULATOR is easy to use and it also ensures that thermowell is designed within the dimensional limits of PTC19.3, 2010. This calculator establishes the practical design considerations for Thermowell installations in power and process piping, which also incorporates the latest theory in the areas of natural frequency, Strouhal frequency, in-line resonance and stress evaluation.” The same webpage provides a Temperature Calculator to convert the Emf (mV)/Ohms generated by thermocouple & RTD to the … Continue reading

Multilingual Humidity Calculator Online

From E+E Elektronik The humidity calculator from E+E Elektronik is used for the rapid conversion of humidity measurements. Uniquely, the humidity calculator also includes measurement uncertainties in the calculation. The humidity calculator can be used online using your favorite Web browser. Thus, it does  not require any program to be installed on a PC. Or, http://www.epluse.com/fileadmin/Humidity_calculator/EEHumidityCalculator.swf An Explanation of humidity calculator measurements is found here. But it is more than a simple help page it is, as entitled on the E+E Electronik website “Explanation of humidity calculator measurements”, with a definition or description of each term and the appropriate measurement … 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

Online Thermowell Calculation Tool

Emerson’s Online Calculation Tool Helps Users Select Thermowells in compliance with the 2010 ASME Standard Emerson Video about PTC 19.3 TW MINNEAPOLIS MN, USA — Emerson Process Management has introduced an online thermowell calculation tool that incorporates therecent ASME PTC 19.3 TW standard. “The new tool offers preliminary calculations and gives users the option to perform a quick pass or fail thermowell calculation,” said Danjin Zulic, temperature marketing engineer, Emerson Process Management. “Users can save time by performing iterative, preliminary calculations to select the right thermowell earlier in the design process.” The tool is now available free-of-charge at www.rosemount.com/thermowellcalc. Emerson … Continue reading

New ASTM Standard For Digital Thermometers

ASTM E2877, Guide for Digital Contact Thermometers W. Conshohocken PA, USA — A new ASTM International standard provides a variety of recommendations for the manufacture and selection of digital thermometers. ASTM E2877, Guide for Digital Contact Thermometers, was developed by Subcommittee E20.09 on Digital Contact Thermometers, part of ASTM International Committee E20 on Temperature Measurement. Included in ASTM E2877 is a set of accuracy classes for digital thermometers. These classes pertain to the temperature interval from -200 °C through 500 °C, an interval important for many thermometry applications. In order to qualify for a specific accuracy class, a thermometer must … Continue reading