thermocouple Articles

  • Thermocouples

    THERMOCOUPLES  Thermocouple is one of the most popular type of temperature sensors used in industry. Thermocouple uses thermoelectric effect (Seebeck's effect). The construction of thermocouple sensors Thermocouple is produced as two wires: metal (alloy) X and metal (alloy) Y join (welded) at one end. Such pair of wires is then coiled with an electrical insulator and tightly ...


    By madur Polska Sp. z o.o.

  • RTDs vs. Thermocouples

    Selecting the right temperature sensors for each application requires a close examination of the requirements. Imagine you are an instrumentation engineer looking at the prints for a new plant, and you see the many locations marked out for temperature transducers. You wonder, what exactly has been specified to fill each space? Thermocouples, because of the lower cost and familiarity, or RTDs, ...


    By Thermometrics Corporation

  • Plume structure and dynamics from thermocouple and spectrometer measurements

    Abstract The movements, structure, and dynamics of a heated stack plume are revealed by thermocouple and spectrometer measurements. A three-dimensional thermocouple array provides temperature data at two-second intervals. An animated display allows the temperature and position variations of a plume to be visualized, and demonstrates that the plume parameters have significant temporal ...


    By D&P Instruments

  • Numerical Modeling of a Thermal Conductivity Matric Suction Sensor

    Thermal conductivity matric suction sensors appear to be a promising device for the measurement of suction in soil. The technique indirectly measures matric suction by measuring the thermal conductivity of a ceramic block. This paper uses both a spherical and a cylindrical porous medium to simulate the heat flow in a thermal conductivity matric suction sensor. It is found that, although the ...


    By ASTM International

  • Validation and calibration of a spectroscopic technique for determination of gas plume temperature

    Abstract Results are reported from a continuing program of research into the physics and spectroscopy of heated stack plumes. Simultaneous thermocouple and spectrometer measurements are used to study sideways—directed plumes from an internal combustion engine and a propane-burning plume generator. A previously-reported result, that the ratio of optically thin signals from two CO2 ...


    By D&P Instruments

  • Total Suction of Artificial Mixtures of Soil Compacted at Optimum Water Content

    The effect of soil composition on total suction is investigated. Thermocouple psychrometers are used to measure total suction of compacted specimens of artificial soil mixtures prepared using kaolinite, sodium montmorillonite, and a fine sand. Specimens are compacted in a Harvard miniature compaction mold at the optimum water content. The measured total suction is related to fine fraction and ...


    By ASTM International

  • Gypsum Board in Fire — Modeling and Experimental Validation

    The thermal behavior of a commercially widespread gypsum board (810 kg/m 3) under fire condition has been investigated. For this purpose two 12 mm thick gypsum boards are subjected to the standard fire ISO 834 and the temperature distribution within them is measured by means of thermocouples placed at different depths in the samples. The results hereof are used to validate a numerical model based ...


    By SAGE Publications

  • Prediction of Potential Heave of Swelling Soil

    Methods of characterizing swell behavior and predicting total potential heave of foundation soils were compared with field measurements for three test sections. The methods used included nine empirical procedures, three types of consolidometer tests, and a thermocouple psychrometric soil suction method. It was found that simple classification tests can provide reasonable estimates of field ...


    By ASTM International

  • Behavior of Flame Spread Downward over Thick Wood Sheets and Heat Transfer Analysis

    To investigate the flame spreading mechanism over charring materials under natural convection, wood sheets from 0.9 to 3 mm thickness have been chosen. The variation of mean flame spread velocity V with thickness  is measured. Typical flame shapes over the wood surfaces are recorded using CCD. The temperature fields in the gas phase are examined by a set of fine thermocouples. On the basis ...


    By SAGE Publications

  • Evaluation of traditional half orange type charcoal kiln for carbonisation: a case study

    A case study for evaluation of an Argentinean type charcoal kiln for carbonisation of wood was carried out. A study has been carried out to characterise fuel before and after carbonisation, thermal analysis and mass balance of carbonisation process using a conventional charcoal kiln. For thermal analysis of carbonisation process, Copper Constantine thermocouples were installed at the centre of ...


    By Inderscience Publishers

  • Tracking a Ceiling Jet Front for Hot Smoke Tests in Tunnels

    There are difficulties in tracking the ceiling jet front while carrying out hot smoke tests in long tunnels with a small fire. In this study, an experimental method using infrared beams is suggested. The arrival time of the hot ceiling jet front to a designated position is measured by the abrupt attenuation of the infrared beam intensity. Field measurements are carried out in an underground ...


    By SAGE Publications

  • Performance Verification for a Nursing Home’s Hot Water System

    CAS DataLoggers has provided the performance verification solution for an HVAC provider monitoring the efficiency of its solar collector water heating system installed in a nursing home. The company’s solar collectors are commonly used to heat residences, pools and hot tubs to provide cheaper hot water. ...


    By CAS DATALOGGERS

  • Control and instrumentation in start-up neutron detector handling mechanism in fast reactor

    In pool-type fast reactor, during initial fuel loading, first approach to criticality and low power operations special provision is to be made in the central fuel sub-assembly to accommodate the neutron detectors in a guided assembly. This instrumented sub-assembly had to be retracted during fuel loading to facilitate plug rotation and then will be lowered again for core monitoring. This assembly ...


    By Inderscience Publishers

  • Theory, Modeling, and Measurements of Gas Plumes

    Abstract Spectroscopic measurements of infrared CO2 transitions in gas plumes are reported, and evaluated for their potential to yield a reliable remote sensing technique for determination of plume temperature. Measurements were made on two types of plumes: a sideways-directed plume from a vehicle exhaust, and a stack plume from a propane-burning portable plume generator. Modeling of CO2 ...


    By D&P Instruments

  • Heat penetration characteristics of mushroom curry packed in retort pouch

    White button mushrooms (Agaricus bisporus) in curry, packed in retort pouches were heat-processed in a pressurised autoclave. Retort pouches (105 µ thick) used had an outer polyester layer (12.5 μ), a middle aluminum layer (12.5 µ) and an inner cast polypropylene layer (80 µ); size 20 cm×16 cm; seal size 10 mm and lip size 4 mm. Adequate number of pouches were fixed with glands to insert the ...


    By Inderscience Publishers

  • Environmental Monitoring in an Emu Farm

    Recently CAS DataLoggers provided the comprehensive environmental monitoring system for a large emu farm’s animal husbandry project. The farm’s male emus were devoted parents, incubating their partners’ eggs. Given that they neither ate nor drank while on duty, their owners needed to know if they were developing any ...


    By CAS DATALOGGERS

  • Tunnel Fires: Experiments on Critical Velocity and Burning Rate in Pool Fire During Longitudinal Ventilation

    In this study, the 1/20 reduced-scale experiments using Froude scaling are conducted to investigate the effect of longitudinal ventilation velocity on the burning rate in tunnel fires. The methanol pool fires, acetone pool fires, and n-heptane pool fires with a heat release rate ranging from 2.02 to ~6.15 kW, 2.76 to ~11.04 kW, and 2.23 to ~15.6 kW, respectively, are used. A load cell is used to ...


    By SAGE Publications

  • Determining Concrete Maturity Using Temperature Data Loggers

    CAS DataLoggers has provided the temperature monitoring devices for a construction contractor which needed to monitor and record the cure of structural concrete onsite. Once workers could prove that the concrete was strong enough, they could then proceed with new construction. The company was on a tight ...


    By CAS DATALOGGERS

  • CTXL SUPERECORDER Takes Circular Chart Recording to the Nest Level

    Chart recorders are a familiar sight in manufacturing plants, where they track such variables as temperature, pressure, flow, pH, and humidity. Laboratories, meanwhile, use them to monitor scientific and engineering data generated in testing, diagnostics, statistical analysis, and other work requiring a graphic record. Omega Engineering has long been a force in chart recording, and with the ...


    By Omega Engineering Ltd.

  • Field Model Analysis and Experimental Assessment of Fire Severity and Smoke Movement in a Partitioned and a Non-partitioned Dwelling Unit

    Inter-compartment smoke spread in a dwelling unit is greatly impeded by the presence of partition walls. For the same fire load and floor area, smoke movement and associated fire severity for a non-partitioned (NP) unit are different from those of a partitioned (PT) unit. To study the smoke movement and gas temperature evolution, computational fluid dynamics (CFD) analysis is carried out for a ...


    By SAGE Publications

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