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Products => Test Equipment => Topic started by: Odd on December 14, 2024, 04:11:06 pm

Title: anyone seen a review of the cheap 100X differential probe from Aliexpress
Post by: Odd on December 14, 2024, 04:11:06 pm
You can easily find them here:
https://www.aliexpress.com/w/wholesale-10M-Oscilloscope-Differential-Probe.html (https://www.aliexpress.com/w/wholesale-10M-Oscilloscope-Differential-Probe.html)

I am looking for some review/test, a differential probe does not *need* to cost a lot, as there is nothing special inside, and I am curious about this one, how it compares to the well known Micsig and such.
Title: Re: anyone seen a review of the cheap 100X differential probe from Aliexpress
Post by: xtech on December 14, 2024, 04:22:37 pm
That aliexpress diff probe is low voltage one (max 40Vpp). For micsig you have 700Vpp - you pay for your safety ;) Also bandwidth is 10x smaller.
Title: Re: anyone seen a review of the cheap 100X differential probe from Aliexpress
Post by: stj on December 14, 2024, 04:27:27 pm
it looks risky,
i would want a plastic outer housing and plastic or shrouded BNC's incase it accidentally grounds against something!
Title: Re: anyone seen a review of the cheap 100X differential probe from Aliexpress
Post by: nctnico on December 14, 2024, 04:33:17 pm
Quote from: Odd on December 14, 2024, 04:11:06 pm
You can easily find them here:
https://www.aliexpress.com/w/wholesale-10M-Oscilloscope-Differential-Probe.html (https://www.aliexpress.com/w/wholesale-10M-Oscilloscope-Differential-Probe.html)

I am looking for some review/test, a differential probe does not *need* to cost a lot, as there is nothing special inside, and I am curious about this one, how it compares to the well known Micsig and such.
This one is intended to bring small signals into an oscilloscope (hence the 10x and 100x gain). Not for probing high voltages. This doen't make it useless but it just serves an entirely different purpose which makes it not comparable to the high voltage differential probes Micsig makes.
Title: Re: anyone seen a review of the cheap 100X differential probe from Aliexpress
Post by: kripton2035 on December 14, 2024, 05:45:32 pm
I bought a used high voltage diff probe for almost the price of this new low voltage one...
just post alerts on ebay or your local craiglist and be a little patient.
Title: Re: anyone seen a review of the cheap 100X differential probe from Aliexpress
Post by: egonotto on December 14, 2024, 08:21:33 pm
Hello,

but there is something about it:
https://www.eevblog.com/forum/testgear/cheap-chinese-oscilloscope-preamp-tear-downreview-is-it-any-good/msg5712421/#msg5712421 (https://www.eevblog.com/forum/testgear/cheap-chinese-oscilloscope-preamp-tear-downreview-is-it-any-good/msg5712421/#msg5712421)

https://www.eevblog.com/forum/testgear/t100-1x10x100x-oszilloskop-differentialsonde/msg5732125/#msg5732125 (https://www.eevblog.com/forum/testgear/t100-1x10x100x-oszilloskop-differentialsonde/msg5732125/#msg5732125)

https://www.eevblog.com/forum/testgear/review-of-t100-differential-amplifier/msg5627507/#msg5627507 (https://www.eevblog.com/forum/testgear/review-of-t100-differential-amplifier/msg5627507/#msg5627507)



Best regards
egonotto
Title: Re: anyone seen a review of the cheap 100X differential probe from Aliexpress
Post by: nctnico on December 14, 2024, 08:48:38 pm
Quote from: egonotto on December 14, 2024, 08:21:33 pm
Hello,

but there is something about it:
https://www.eevblog.com/forum/testgear/cheap-chinese-oscilloscope-preamp-tear-downreview-is-it-any-good/msg5712421/#msg5712421 (https://www.eevblog.com/forum/testgear/cheap-chinese-oscilloscope-preamp-tear-downreview-is-it-any-good/msg5712421/#msg5712421)
Thanks for bringing that up! The bottom line is that these devices are crap. Having it battery powered only to completely screw up the noise floor by having a switching PSU inside  :palm: