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Practical Questions

In Practical Instrumentation Questions section, you will get industry related technical questions with problem solving approach,

Differential Pressure Sensor with pair of Strain Gauges

Differential Pressure Sensor with Pair of Strain Gauges

The following differential pressure sensor uses a matched pair of strain gauges. As the differential pressure increases, one strain gauge

strain gauge changes as it stretches and shrinks

Why Strain Gauge Resistance Changes as it Stretches and Shrinks?

A strain gauge is a device used to measure the strain (compression or expansion) of a solid object by producing

Strain Gauge Bridge Circuit

Something is Wrong with Strain Gauge Bridge Circuit

A strain gauge is an array constructed from thin metal film designed to increase resistance as it is stretched and

Pressure gauge is subjected to five different pressures

How a Bourdon Tube Pressure Gauge might be Adjusted for Linearity?

A pressure gauge is supposed to accurately indicate applied pressure over its full calibrated range. Bourdon Tube Pressure Gauge In

Bourdon Tube Gauge Spiral Spring

What is the Purpose of Bourdon Tube Gauge Spiral Spring?

Some bourdon tube gauges are equipped with a very small spiral spring attached to the pointer shaft: Bourdon Tube Gauge

Span of Pressure Gauge

How to Decrease Span of Pressure Gauge?

Suppose a pressure gauge uses a diaphragm as its pressure-sensing element, like this:  Pressure Gauge This mechanism will work, but

calibrating low-pressure instrument

Simulate Different Values for Pressure Instrument Under Test

One challenge technicians face when calibrating low-pressure instruments is how to generate very low air pressures to simulate different low-pressure

pressure transmitter calibration setup

Why Pressure Vessel Connected to Tubing System?

A very useful principle in physics is the Ideal Gas Law, so called because it relates pressure, volume, molecular quantity,

Accuracy of a Manometer

What Affect the Pressure Measurement Accuracy of a Manometer?

A device called a manometer is a very simple and yet very precise pressure measuring instrument. It works on the

Pressure gauge mechanism

How Measurement Span of Pressure Gauge Could be Changed?

Shown here is a diagram of a standard pressure gauge, based on the pressure-sensing action of a hollow, C-shaped metal

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