pressure sensor Articles

  • Using the HydraProbe Soil Sensor for Determination of Flood Risk in the New York State Mesonet

    In January 2014, the Department of Homeland Security established the New York State Early Warning Weather Detection System. The centerpiece of the system is the New York State Mesonet, a network of 125 weather stations across the state, with at least one site in every county. Each site measures temperature, humidity, wind speed and direction, pressure, radiation, and soil information (provided by ...

  • Changing Response Times

    Timing is everything for your sensors. A sensor that is too sluggish to respond to quickly changing levels or pressure won’t alert you to dangerous process conditions until it’s too late. And an overly sensitive sensor sees an emergency in every stray reading or transient condition. Neither sensor is effective, in terms of time or money. Sensors ...

  • The Role of Soil Moisture on our Climate, Weather and Global Warming

    Global warming is a topic that has received much attention in the media, especially during the hot days of summer. The process by which carbon dioxide (CO2) in the atmosphere prevents the escape of thermal energy into outer space is known as the greenhouse effect. The higher the carbon dioxide levels in the atmosphere the less thermal energy that can escape thus an increasing ...

  • Dissolved oxygen measurements in aquatic environments: The effects of changing temperature and pressure on three sensor technologies

    Dissolved oxygen (DO) is probably the most important parameter related to water quality and biological habitat in aquatic environments. In situ DO sensors are some of the most valuable tools used by scientists and engineers for the evaluation of water quality in aquatic ecosystems. Presently, we cannot accurately measure DO concentrations under variable temperature and pressure conditions. ...

  • Pressure transmitters: It’s class that counts

    KELLER would like to do away with DIN standards. The company is backing the introduction of an accuracy class, as it did for pressure gauges. The conditions under which the class is complied with are described in specifications. The new EC standards make it more difficult for companies to manufacture their own transmitter electronics. Changing from OEM transducers to OEM transmitters is ...

  • Determining Preconsolidation Stress and Penetration Pore Pressures from DMT Contact Pressures

    Over recent years, several geotechnical explorations in clay deposits have shown the flat dilatometer test (DMT) to provide reasonable estimates of in-situ overconsolidation ratio with depth. Why should the horizontal stress index (KD = initial contact pressure minus hydrostatic pressure normalized to the effective overburden stress) show an empirical trend with over consolidation ratio (OCR)? It ...


    By ASTM International

  • Sensors & Automation to Simplify Bioprocess Operations

    Utilising sensors & automation to simplify bioprocess operations means that more work can be done in less time. By automating the routine tasks carried out in the lab, valuable time can be devoted to more important tasks. Here are two practical examples of automating routine tasks in upstream and downstream bioprocessing with relatively simple instrumentation. Automated ...


    By Broadley-James Ltd

  • Ultrasonic Sensors: Range Vs Frequency

    Ultrasonic sensors are pretty cool. Transducers send and receive waves, measurements magically get spit out by the sensor, and nothing had to touch anything, right? You can choose sensors based on range, or type of transducer, or even safety ratings. Most sensors declare their range and frequency together, which seems kind of odd. Why is the range of an ultrasonic sensor tied to its frequency? ...

  • When a pressure transmitter leaves the linearity: the Rosemount Case

    When a Rosemount pressure transmitter experiences the inner silicone oil-loss syndrome, it loses its linear behaviour. In such a case, the response time is not unique; as a consequence, focusing the sensor surveillance to the response time, as required by the technical specifications of the nuclear plant, might have no sense. In which way is the sensor dynamic not linear? Answering this open ...


    By Inderscience Publishers

  • Robust sensor placement for leak location: analysis and design

    In this paper, a nominal sensor placement methodology for leak location in water distribution networks is presented. To reduce the size and the complexity of the optimization problem a clustering technique is combined with the nominal sensor placement methodology. Some of the pressure sensor placement methods for leak detection and location in water distribution networks are based on the ...


    By IWA Publishing

  • Calibration of Thermal Conductivity Sensors for Measuring Soil Suction

    The accuracy of suction measurements using thermal conductivity sensors is dependent upon their calibration. Therefore, a calibration study was undertaken by using a modified, commercially available, pressure plate extractor. The experimental setup along with the calibration procedure are described. Typical calibration results are presented. In general, results showed reasonable agreement between ...


    By ASTM International

  • Differential Pressure and Temperature Monitoring in a Hospital Cleanroom

    Accsense A1-01a Wireless Environmental Data Loggers CHESTERLAND OH—April 9, 2012 CAS DataLoggers recently provided the wireless pressure and temperature monitoring solution for a hospital maintaining a surgery cleanroom to protect patients from a variety of environmental contaminants. Staff entered and exited through airlocks and were required to wear cleanroom suits before entering. Air ...


    By CAS DATALOGGERS

  • The duty-factor - choosing a quality high pressure system

    Definition of Duty-Factor The duty-factor of your pump or system could simply be the product life. Or the duty-factor could be more specifically defined as the length of time a pump or system runs between servicing and the type of performance during this time frame. Elements determining Duty-Factor The duty-factor is affected by many variables including ...


    By Cat Pumps

  • Liquid Level Sensor Technology Decision Tree

    Here it is, the week after Christmas, and you still haven’t gotten that special something for your process system. A liquid level sensor would be great, but you just aren’t sure what type of sensor would be best for you, ...

  • Safe Landings Whatever the Weather: Lufft Sensors on Airports

    Pilots, air traffic controllers and airport operators do their best to make air travel safer and more efficient. Sometimes, however, flight security depends on external factors we can hardly influence. This especially refers to risky weather conditions: Strong winds, icy cold or strong precipitation can have serious consequences. On average, 23% of all aircraft accidents and 68% of canceled ...

  • Oxygen (O2) Monitors: Disposable Sensors eating your Cash? PureAire Introduces 10 + Year Sensor.

    PureAire Monitoring Systems is a leading manufacturer in the gas monitoring industry. When it comes to O2 deficiency monitors PureAire makes the most reliable, longest lasting, and affordable oxygen monitors. It has been an international standard for the past three decades to use oxygen monitors with disposable sensor cells, (electrochemical sensors). All disposable sensors require frequent ...

  • Stop metal losses in processes with Sulphide, Cyanide, Ammonia and Pressure Fluctuations

    Abstract Losses of metal are often traced to incorrect pH/ORP signals in floatation, leaching, extraction, electrolysis, and precipitation processes, aggravated by pressure changes. IC Controls a Canadian mining sensor manufacturer developed a new superior pH/ORP sensor that stops metal losses, reduces environmental footprint and contributes to sustainability. The cause of incorrect pH/ORP ...


    By IC Controls Ltd.

  • A Multi-Sensor Piezometer for Shallow Marine Sediments in Coastal Environments

    A multi-sensor piezometer has been developed to measure dynamic excess and ambient pore pressures in shallow marine sediments under the effect of surface waves, tides, and currents. The probe consists of a shaft (1.5 m long with five porous stones at subseafloor depths ranging from 0.10 to 0.93 m) and two upper chambers (one that is hermetically sealed for the transducer electronics and another ...


    By ASTM International

  • Spectral distribution of uv light during aging of medium pressure UV lamps

    As part of a project to validate a UV reactor for disinfection of drinking water, the germicidal output of four medium pressure lamps housed in a continuously operating reactor was followed as a function of time. Spectra were measured monthly and were used in conjunction with radiometer readings to calculate germicidal fluence rates (using DNA absorbance weighting) at the radiometer sensor ...

  • Sensor placement for leak detection and location in water distribution networks

    The performance of a leak detection and location algorithm depends on the set of measurements that are available in the network. This work presents an optimization strategy that maximizes the leak diagnosability performance of the network. The goal is to characterize and determine a sensor configuration that guarantees a maximum degree of diagnosability while the sensor configuration cost ...


    By IWA Publishing

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