Pressure Transducers Group 1

8/3/2019 Pressure Transducers Group 1

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PRESSURE TRANDUCERS

A modern pressure sensor thatuses various techniques to convertthe pressure effect to an electrical

effect such as change in voltage,resistance or capacitance

They are smaller, faster, sensitive,reliable, and precise

They can measure pressures fromless than a millionth of 1 atm toseveral thousands of 1 atm


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A Variety of Pressure Transducersincludes:

Differential Pressure Transducer

Absolute Pressure Transducer

Strain-Gauge Pressure Transducer

Piezoelectric Pressure Transducer

As categorized by manufacturers

General Purpose Pressure Transmitter

High-Range Pressure TransmitterSuction Pressure Transmitter

Vacuum Pressure Transmitter


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Differential Pressure Transducer

o measures the pressure difference between 2locations directly instead of using 2 pressuretransducers and then taking there difference

odifferential pressure meters contain manycharacteristics found in modern measuring

instruments such as, memory for minimumand maximum value, Data Hold function,display, internal memory, the ability totransfer data to a computer and software forprocessing measurement values


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XMD Process Plant DP CellXMD Process Plant DP CellDifferential Pressure TransmitterDifferential Pressure Transmitter


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DPS Low Differential PressureDPS Low Differential PressureTransmitterTransmitter


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PD39X High Differential PressurePD39X High Differential PressureTransmitterTransmitter


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Absolute Pressure Transducers

Current output transmitters for measuringpressure with an absolute reference. Absolutereferenced pressure transmitters generate a 4mAoutput signal when the pressure corresponds to a

perfect vacuum. An absolute pressure transmitteris used in applications where the pressure of agas or liquid is isolated from atmosphericpressure changes, for example when testing asealed pressure vessel for leaks over a long

period of time.


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XMPiXMPi Process Plant Gauge andProcess Plant Gauge andAbsolute Pressure TransmitterAbsolute Pressure Transmitter


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DMP333iDMP333i RangeableRangeable High PressureHigh PressurePrecision TransducerPrecision Transducer


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IMSL IP68 Stainless Steel 316LIMSL IP68 Stainless Steel 316LHydrostatic Pressure SensorHydrostatic Pressure Sensor


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Strain-Gauge Pressure Transducer

A strain gauge is a long lengthof conductor arranged in a zigzagpattern on a membrane.

Works by having a diaphragmdeflect between 2 chambers open

to the pressure inputs. As thediaphragm stretches its response

to a change in pressure differenceacross it, the strain gaugestretches and a wheatstone bridge

circuit amplifies the output.


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y Gauge reference pressure transmitterscan be configured to measure from -1bar (-15psi) which is approximatelyzero vacuum up to a positive pressuresuch +2 bar (+60psi). For rangesbelow 1 bar (15psi) the compounds

range is typically bidirectionallysymmetric such as -500 to +500 mbar,but it is also possible to provide rangessuch as -200 to +500 mbar if required.


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A piezoelectric ceramicA piezoelectric ceramic-- most common activemost common activeelement of most piezoelectric transducerselement of most piezoelectric transducers


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General Purpose Pressure Transmitter

Pressure transmitters for general purposeapplications measuring air and liquid pressureson pumps, valves, compressors, hydraulic

presses and automated machines.


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IMP Low Cost Pressure SensorIMP Low Cost Pressure Sensor


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DMP304 Ultra High RangeDMP304 Ultra High RangeHydraulic Pressure TransducerHydraulic Pressure Transducer


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DMP334 Hydraulic PressureDMP334 Hydraulic PressureTransducer for Very HighTransducer for Very High

PressuresPressures


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Milliamp output sensors for transmitting the amount ofMilliamp output sensors for transmitting the amount ofmeasured suction pressure.measured suction pressure. All suction range pressureAll suction range pressuretransmitters measure over a negative pressure rangetransmitters measure over a negative pressure rangewith respect to a higher pressure on the reference sidewith respect to a higher pressure on the reference sideof the sensing diaphragm.of the sensing diaphragm.


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Vacuum Pressure Transmitter

a loop powered pressuretransmitter for measurements overthe low vacuum range of 25 to 760Torr absolute or negativegauge. Measure partial vacuumsused for manufacturing processes,food packaging, autoclave

sterilization, leak testing, processpurging and atmospheric simulation.


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AdvantagesAdvantages

--pressure transmitters directly measure pressure levelspressure transmitters directly measure pressure levelsas well as differences in pressureas well as differences in pressure

--can withstand virtually any environment and can evencan withstand virtually any environment and can even

be completely submerged.be completely submerged.

-- made of piezoelectric materials, which are immune tomade of piezoelectric materials, which are immune to

both radiation and electromagnetic fields.both radiation and electromagnetic fields.

-- transmitters can also be connected to other systems,transmitters can also be connected to other systems,such as electrical circuits, and can be calibrated tosuch as electrical circuits, and can be calibrated to

measure pressure relative to atmospheric pressure.measure pressure relative to atmospheric pressure.


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DisadvantagesDisadvantages

--pressure transmitters are oftenpressure transmitters are often

expensive, although this differs forexpensive, although this differs foreach version, and are usuallyeach version, and are usually

difficult to find.difficult to find.


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...for yourpatience,

time andattentiontoday!!!

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Pressure Transducers Group 1