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LVDT options and suppliers?

Hi.  I have a customer who would like to make some LVDT measurements.  Neither I not they are familiar with these sensors.  We are looking at the SCXI LVDT module, but I am wondering if there are now "preconditioned" LVDT sensors available that just output a voltage signal or digital signal without the need for providing the AC signals and performning the demodulation.  This would greatly simplify their DAQ setup and costs.

 

Thanks!

 

Jed

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Hi Jed,

 

Unfortunately, we don't have any recommended LVDT sensors. However, there is a LabVIEW example that takes LVDT measurements. To check it out, navigate to:

 

Help » Find Examples » Hardware Input and Output » DAQmx » Analog Measurements » Position  » Cont Acq LVDT Samples

 

You mentioned you're not familiar with LVDT measurements. Here are a couple links that will explain the basics: Fundamentals, LVDT Measurements. Hope this helps!

 

 

Sean Ferguson
Application Engineering Specialist | RF and Reconfigurable Test
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Thanks for the info.  The SCXI setup would cost about $4000, which is somewhat hefty.

 

Analog devices makes a $20 single chip demodulator/amplifier for LVDTs.  So I was hoping that there might be integrated Sensor/Amplifier parts out there, or low-cost amplifiers so that we would just need to read a simple analog signal.

 

I just don't know where to source the parts.

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I used Schaevitz LVDTs in the past, Both kinds (country and western 😉 )  just the transformer sensor and with DC output.

Ask your customer if he is already fixed to a certain type ... usually this type is choosen because of its mechanical livetime

Using a DC voltage sensor in industrial enviroment is sometimes challenging, a good LVDT conditioner (I used HBM) with a pure LVDT  can solve such problems.

However there are more µ-epsilon, asm, ....

 

 

Greetings from Germany
Henrik

LV since v3.1

“ground” is a convenient fantasy

'˙˙˙˙uıɐƃɐ lɐıp puɐ °06 ǝuoɥd ɹnoʎ uɹnʇ ǝsɐǝld 'ʎɹɐuıƃɐɯı sı pǝlɐıp ǝʌɐɥ noʎ ɹǝqɯnu ǝɥʇ'


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