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Electronics => Projects, Designs, and Technical Stuff => Topic started by: cncjerry on February 19, 2024, 03:57:18 am

Title: 4-wire probes
Post by: cncjerry on February 19, 2024, 03:57:18 am
I did some searching and it seems like decent kelvin probes, not clips, are a little pricey.  I have all kinds of clip style but recently needed sharp probes.  I can roll my own but I'm tired of having to do something else before doing what i want to do.  I remember not that long ago there was a person on here that made lots of probes, who was that and is he still in business?  Other ideas?  The pomona brand were like  $150.

Thanks

Jerry
Title: Re: 4-wire probes
Post by: TomWinTejas on February 19, 2024, 05:48:06 am
Similar thread in the test forum just the other day:

https://www.eevblog.com/forum/testgear/kelvin-probes/ (https://www.eevblog.com/forum/testgear/kelvin-probes/)
Title: Re: 4-wire probes
Post by: bdunham7 on February 19, 2024, 06:10:13 am
If you're referring to these specifically, it's not as easy as it looks to make them.  I tried to set up some universal ones with replaceable (and varied) tips that could be manufactured, but didn't succeed.  You can make one-offs using pogo pins from circuit board testers but making nice probe handles that hold those pins firmly takes some doing. 

https://www.digikey.com/en/products/detail/pomona-electronics/6303/745128 (https://www.digikey.com/en/products/detail/pomona-electronics/6303/745128)
Title: Re: 4-wire probes
Post by: cncjerry on February 19, 2024, 05:24:38 pm
thanks, I searched around last night, didn't see that post. I ordered the first pair. I didn't look all that closely to see if the removeable tips were for sale and available on the 2nd set.  At that price, I would just purchase two sets.  Both are a little clunky, though.

thanks again.

Jerry