Author Topic: Mystery Device(s)  (Read 2383 times)

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Offline metrologistTopic starter

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Mystery Device(s)
« on: October 22, 2016, 10:52:14 pm »
I have my late grandpa's parts bins and have been trying to identify many of the components. Many if the IC's I can find datasheets, but many I cannot, and there are some parts unmarked.

Here is a very small passive device. The 2 legs at the top are hair sized and about an inch long, so the device is small SMD size; however, grandpa has nothing SMD and much of what he has is 70's-90's vintage. If this is not for microwave, what could it be?

p.s. I have several in a plastic package, so the image is looking through old plastic under ~20x mag.
« Last Edit: October 22, 2016, 10:54:04 pm by metrologist »
 

Offline Rerouter

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Re: Mystery Device(s)
« Reply #1 on: October 22, 2016, 10:53:37 pm »
Its either an inductor, or a strain gauge by my eyes,

Resistance should chance when deflected if a strain gauge.
 

Offline RoGeorge

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Re: Mystery Device(s)
« Reply #2 on: October 23, 2016, 12:14:32 am »
My first bet would be for a strain gauge.
Second bet, maybe an RTD: http://www.capgo.com/Resources/Temperature/RTDs/RTD.html

Offline metrologistTopic starter

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Re: Mystery Device(s)
« Reply #3 on: October 23, 2016, 12:20:46 am »
That's cool. I think it is Resistance Temperature Detector (RTD). Thanks!

I bet he had them for replacements for his DMM.
« Last Edit: October 23, 2016, 12:22:17 am by metrologist »
 

Offline SeanB

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Re: Mystery Device(s)
« Reply #4 on: October 23, 2016, 04:53:00 pm »
If it is a ceramic substrate it is a Pt100 sensor, and if it is on a mylar or Kapton substrate it is a strain gauge. Pretty much the same thing, just the one is on a close to zero expansion substrate to measure temperature, and the other is designed to be exposed to strain.
 

Offline metrologistTopic starter

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Re: Mystery Device(s)
« Reply #5 on: October 25, 2016, 01:14:33 am »
LoL! In Dave's latest mailbag #936 he shows many of the same sort of old stuff I have. The transistors, dip IC's, and resistors and caps from that era. :-DD
 


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