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hydraulic brake system
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Aerospace, Automotive, Data Acquisition, Flight Testing, Pressure Measurement

Vehicle Hydraulic Brake System Testing

Automotive braking systems are obviously very important and must be thoroughly tested prior to production.  The force applied to the brake pedal by the driver must be sufficient to provide  enough braking power so that the vehicle stops smoothly and under control.  Validyne model P55 differential pressure transducers have been widely used to measure hydraulic… Read More
wind tunnel
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Automotive, Data Acquisition

DAQ Used in Climatic Wind Tunnel for Vehicle Testing

A new model automobile must be thoroughly tested in climate extremes before it is put into production. Will the heater keep the passengers warm in a blizzard? Will the cabin be cool enough in the desert summer? Can the engine cope with temperature extremes? Auto manufacturers now answer all of these questions by placing a… Read More
Measuring Flow
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Pressure Measurement

Measuring Flow in Liquids with Pressure Transducers

Differential pressure transducers have been widely used to measure flow rate of in-compressible liquids such as water.  The most common method is to measure the pressure drop across an orifice plate in the pipe and calculate the flow rate. An orifice plate is simply a plate installed in the pipe, usually between flanges, that has… Read More
Vertical Hydraulic Gradient Setup
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Pressure Measurement

Measuring the Vertical Hydraulic Gradient in River Beds

Where does the water in a river come from?  The obvious answer is that it comes from upstream, the sum of the waters added by many tributaries.  This is certainly correct – and the largest factor in river flow.  But this is not the only source of water in a river.  Depending on geography and… Read More
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Aerospace, Flight Testing, Oil & Gas, Pressure Measurement, Utility

Tank Level Measurement

Introduction: Measuring the fluid level in tanks is a common requirement for almost every industrial process.  The automatic control of fluids depends on knowing how much liquid is stored in a tank at any given time.  This is used to monitor inventory and control pumps.  This application describes how to use high line differential pressure… Read More
absolute or gage
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Aerospace, Flight Testing, Military, Pressure Measurement

Absolute Pressure Sensor or Gage Pressure Sensor?

An absolute pressure sensor measures the pressure relative to zero absolute pressure or a perfect vacuum. A gage pressure sensor measures the pressure relative to the normal atmospheric pressure. This can sometimes lead to some confusion when ordering an absolute pressure sensor for pressures that can be easily measured by a gage pressure sensors. Because… Read More
freqvsamplification
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Pressure Measurement

Estimating the Frequency Response of Variable Reluctance Pressure Sensors in Gas

Summary – Frequency response is defined as the ability of a measurement system to accurately reflect dynamic pressure changes. The measurement system consists of a pressure sensor and its associated electronics and plumbing. Each component of the system affects the dynamic frequency response. This blog post will describe the factors affecting the frequency response of variable reluctance transducers, and… Read More
CPAP
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medical, University

PS309 Used to Test CPAP Mask

Sleep apnea is common sleep disorder in which breathing repeatedly stops and starts. This is most commonly caused by the relaxing of throat muscles or, more rarely, when the brain fails to send the right signals to the muscles that control breathing. This can be a serious condition leading to increased risk of strokes, high… Read More
skydrol
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Aerospace, Military

Pressure Measurements in Skydrol Hydraulic Systems

Skydrol is a phosphate ester hydraulic fluid used in aircraft.  Hydraulic systems in aircraft are most often used to position control surfaces and actuate the landing gear.  Broken hydraulic lines in and around hot engine parts were causing fires in the early years of air travel, so in the 1940s Douglas Aircraft  and Monsanto jointly… Read More
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Aerospace, Automotive, Flight Testing, Military, Oil & Gas

Fluid Isolation in Pressure Transducers for Corrosion Protection

When the chemicals present in a fluid are very aggressive, and the pressure transducer is not available in materials sufficiently resistant to corrosion, it is often possible to mitigate these conditions with a fluid isolation system. This system can be created from easily available parts and help to achieve a useful service life where rapid… Read More
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    • 04 Dec

      Vehicle Hydraulic Brake System Testing

      by Validyne December 4, 2019
    • 21 Nov

      DAQ Used in Climatic Wind Tunnel for Vehicle Testing

      by Validyne November 21, 2019
    • 08 Aug

      Measuring Flow in Liquids with Pressure Transducers

      by Manish Desai August 8, 2019
    • 31 May

      Measuring the Vertical Hydraulic Gradient in River Beds

      by Manish Desai May 31, 2019
    • 15 Nov

      Tank Level Measurement

      by Validyne November 15, 2018

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