linear displacement sensor for arduino

Other Hardware Sensors
1

I am looking for linear displacement sensor for arduino (LVDT)

sensor that would be possible to connect it to an arduino to get the data?

any part suggestions will be a great help.

Thanks & Regards,
Bobas

2

Which sensors did you find/try already?

What measurement principle are you looking for?
What distance?
What resolution?
Other requirements?

3

Thank you for the reply.
Looking for a linear displacement sensor with 0mm to 20mm or more , and need to measure less than 0.1 mm, possible to measure a deviation of 0.1mm,

Looking at this part https://uk.farnell.com/vishay/rp12025l472bwb/linear-displacement-sensor-25mm/dp/2578642
you think that this sensor would be possible to connect it to an arduino to get the data? did not find the minimum measuring range for the above part?

4

Just quickly read the datasheet

This sensor appears to be basically a 22k linear pot, with the displacement sensing element connected to the wiper. So yellow to +5V, green to GND. As I understand it fully retracted it is at the yellow end - so your analog reading will be 1023, while fully extended is at the green end, analog reading will be 0.

If you connect the green and yellow the other way around you get a reversed operation.

5

FYI - Finding the right sensor for linear displacement | Machine Design

6

Hi,
Welcome to the forum.

What is the application?

Tom.. :slight_smile:

7

A couple of thoughts:

  1. you would never to to "0" of a transducer (aka the end of the stroke). You would always offset the sensor so you would always be in the "active" range of the transducer, In this case maybe 5 mm.

  2. You should evaluate your goal of 0.1 mm, because to actually reach that accuracy the transducer must be better than the 0.1mm. The setup will always have its own errors. Maybe flexing, slop in the mechanical connections etc.

John