field instrument Articles | Environmental XPRT

Study of behaviour of workings in longwall panel based on field instrumentation

The paper presents field monitoring study of two adjacent longwall panels based on stress measurements in longwall block and barrier, load transferred on to the gate roads and convergence measurements in the gate roads during face retreat in the panels. Results indicated that the section of barrier lying in the goaf experienced higher abutment stress when compared with the section lying ahead of ...

Jul. 20, 2009

By Inderscience Publishers

The soldier salesman: field instrumentation

“The victorious strategist only seeks battle after the victory has been won, whereas he who is destined for defeat first fights and afterwards looks for victory.” — Sun Tzu, The Art of War These words may apply to warfare, and though they were written over two thousand years ago by a Chinese general, they could not be more accurate than when applied to today’s sales ...

Dec. 1, 2004

By HM Digital, Inc.

Analysis of stress distribution in longwall barrier: a case study

This paper presents results of a detailed study on the stress distribution in longwall barriers during extraction of coal in an underground mine. Analysis was carried out on the stress obtained at different locations in the barrier using finite element modelling and field monitoring. Results indicated that the zone of barrier lying in goaf experienced higher stress when compared with barrier ...

Feb. 25, 2010

By Inderscience Publishers

Preparation, Adoption, and Submittal of State Implementation Plans; Test Method 205, Appendix M

The purpose of this rule is to add a test method which would be used to verify the performance and accuracy of gas dilution systems during a field test. The test method is entitled, 'Verification of Gas Dilution Systems for Field Instrument Calibrations,' and will be added to 40 CFR part 51, appendix M, as Test Method 205. This method will allow the facility greater flexibility while assuring the ...

May 30, 1995

By Environics, Inc.

Simplified Heave Prediction Model for Expansive Shale

A model is suggested to predict heave of expansive shale formation based on soil suction change. The model satisfactorily described the field volume change where the anticipated heave is compared with direct measurement obtained from an instrumented field station. The prediction is further simplified by introducing a model that only uses the moisture content variation to determine the amount of ...

Dec. 1, 1990

By ASTM International

40 years of expertise in gas analysis, definitely something to celebrate

This year, Chromatotec celebrated its 40 years of expertise in gas analysis; 40 years in the market through the implementation of its dedicated product MEDOR® all around the world. The MEDOR® analyzer has now become the reference instrument in the field of expertise of natural gas in several countries especially in the United States. On July 9, in attendance of its distributors, ...

Dec. 18, 2015

By Chromatotec Group

Large contribution of water-insoluble secondary organic aerosols in the region of Paris (France) during wintertime

Near real-time measurements of carbonaceous aerosols were performed in fine aerosols for a 10-day period during winter at a suburban site of Paris (France). These measurements were performed using an OCEC Sunset Field instrument for elemental carbon (EC) and organic carbon (OC) ; a Particle-Into-Liquid- ampler coupled with a Total Organic Carbon (PILS-TOC) instrument for water-soluble OC (WSOC) ; ...

Nov. 17, 2011

By Chromatotec Group

FIELD PORTABLE X-RAY FLUORESCENCE SPECTROMETRY FOR THE DETERMINATION OF ELEMENTAL CONCENTRATIONS IN SOIL AND SEDIMENT

The FPXRF technologies described in this method use sealed radioisotope sources to irradiate samples with x-rays. X-ray tubes are used to irradiate samples in the laboratory and are beginning to be incorporated into field portable instruments. When a sample is irradiated with xrays, the source x-rays may undergo either scattering or absorption by sample atoms. This later process is known as ...

Jan. 2, 1998

By Thermo Scientific Niton Analyzers

Control valve actuators: Their Impact on control and variability

Electric control valve actuators provide excellent performance and are ideal for oil and gas wells in remote production fields. Instrument air supply systems are costly and require significant energy to run. If mains power isn't available, an instrument air supply isn't practical, especially when only a few control valves are in use at a location. Solar powered DC electric actuators are ideal for ...

Jun. 18, 2011

By Rotork plc

Sustainability Transitions Research: Transforming Science and Practice for Societal Chan

Abstract The article describes the field of sustainability transitions research, which emerged in the past two decades in the context of a growing scientific and public interest in large-scale societal transformation toward sustainability. We describe how different scientific approaches and methodological positions explore diverse types of transitions and provide the basis for multiple theories ...

Oct. 1, 2017

By Annual Reviews

Search Query What are you looking for? How our minidot was swept up in a flood — and survived

The miniDOT logger is a submersible water logger that measures dissolved oxygen and water temperature. Scientists working in aquaculture are familiar with the quality of PME instruments, which range from small loggers to larger monitoring systems. But what they may not be aware of is that PME’s innovative products occasionally become intrepid travelers. A weekend storm in January took one ...

Mar. 7, 2017

By Precision Measurement Engineering, Inc. (PME)

Measurement uncertainty

The IAEA/WHO Network, through Secondary Standards Dosimetry Laboratories (SSDLs) designated by the Member States, provides a direct linkage of national dosimetry standards to the international measurement system (SI, for Système International). Through the proper calibration of field instruments by the SSDLs, these measurements are traceable to the Primary Standards Dosimetry Laboratories (PSDLs) ...

May 31, 2008

By The International Atomic Energy Agency (IAEA)

Preparing the SM3B for deployment

To prepare the SediMeter™ with cleaner for deployment take note of the following advice: The cleaning shuttle has to be positioned at the top of the sensor, near the motor house, for the cleaning operation to be carried out correctly. If it is placed too low, the instrument will report an error at the end of the first cleaning, and will then turn off any further cleanings. If you wish ...

May 10, 2016

By Lindorm, Inc.

Control valve actuators: Their Impact on control and variability

Sector: Oil & gas Category: Electric actuators Products: CVA Electric control valve actuators provide excellent performance and are ideal for oil and gas wells in remote production fields. Instrument air supply systems are costly and require significant energy to run. If mains power isn't available, an instrument air supply isn't practical, especially when only a few control valves are in ...

Jun. 18, 2011

By Rotork plc

New STS 6150AD Simulator now available

Safe-Series – 6150AD Radiation Field Simulation The new STS Safe-Series range brings new technology into handheld simulation to provide the most realistic simulators available today. A unique radio system produces both a near isotropic field pattern from the source and from the detector. A good representation of the inverse square law and attenuation of different materials adds to the ...

Sep. 21, 2018

By Safe Training Systems Ltd. (STS)

Main uses and capabilities of stud bolts

Stud bolts generally require surface treatment. There are many types of bolt surface treatments. Generally, plating, blackening, oxidation, phosphating, and non-electrolytic zinc sheet coating are commonly used. However, electroplated fasteners occupy a large proportion in the actual use of fasteners. It is more widely used in industries and fields such as automobiles, tractors, home appliances, ...

Dec. 27, 2019

By Haiyan Yingjie Fastener Co., Ltd.

Introduction of new name for SenZ2: Staal Instruments B.V.

With proud we present our new company name and group name “Staal”. At the same time, we would like to inform you about our new company structure: SenZ2 B.V. is replaced by “Staal Instruments B.V.”. All activities of Omniradar continue under the name of “Staal Technologies B.V”. Staal Technologies B.V. and Staal Instruments B.V. both are subsidiaries of ...

Oct. 3, 2019

By Staal Instruments BV

Design and Performance of the Imperial College Instrumented Pile

This paper describes the design, calibration, and field performance of a number of new instruments that have been used for research into the behavior of displacement piles in clays and sand. The instruments include axial load cells, surface stress transducers, and pore pressure probes. The special features of the surface stress transducers and pore pressure probes are described in detail, and ...

Dec. 1, 1991

By ASTM International

NASA`s secret weapon

Thermal Flowmeters Helps NASA Get the Right Mixture Early developments in rhe evolution of mass flowmeters in rhe 1930s were largely driven by rhe need for highly-accurate readings. Over the last 50 years, rhe demand for siibstanrially-rediiced margins of error has only intensified. Sierra Instruments recently introduced a new series of meters daat would allow customers to field-validate ...

Apr. 10, 2019

By Sierra Instruments, Inc.

The Application of Time Domain Reflectometry in Geotechnical Instrumentation

The performance of road pavements and earth structures is dependent on the moisture regime experienced during their service life. One of the practical challenges in understanding moisture regimes in earth structures has been to continuously monitor moisture fluctuations in a nondestructive and reasonably accurate way. The time domain reflectometry (TDR) device shows considerable promise in ...

Sep. 1, 1992

By ASTM International

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