Products > Test Equipment
Is this "Cleqee Direct" store's 300MHz 5000V oscilloscope probe good?
stj:
the voltage divider is in the probe,
as long as you get the ground clip properly connected you wont see high voltages through the cable
DaneLaw:
--- Quote from: janoc on October 24, 2024, 08:40:05 pm ---Cleqee is cheapo Chinese brand making test leads and probes. They are generally acceptable but don't expect high quality, silicon insulated wire and similar luxuries. OK for banana leads but 5kV rated scope probe I would buy from a reputable manufacturer rather than eBay. I value my life and the scope for more than this.
--- End quote ---
As far as I can tell "Cleqee" is just a reflipper brand.... You can find the same so-called "Cleqee" products under many different brands, also western brands that have sourced it from the Far East.
China is mind-boggling huge when it comes to creating anything under the sun, and a lot of these products are "no name" and can be relabeled.
As far as I can tell, it looks to be "Jiangsu Zhongce Electronics" that is actually making these "Cleqee-HV probes" alongside many other things that you often see labeled with Cleqee and other brands.
Jiangsu Zhongce Electronics emphasizes all their high-end SMT production-lines and how they cater/source for many brands and also refers to 1.5G scopes, 3G able sig-gens, and HV-probes.
- if Jiangsu Zhongce is the same company as (Zhongce Instruments) aka "ZCtek" that makes a lot of lab-test-gear.. I don't know, but I reckon it is the same company, as "Jiangsu" looks to be a province and "ZCtek" was awarded that Jiangsu award in 2010, so clearly the same region... looks to be the same company.
Zhongce seems to be of a decent size with numerous daughter companies in various different segments.
It's a maze trying to find heads & tails of these Chinese companies that are very entangled. https://en.zctek.com.cn/product/15/
You can find these probes in numerous variants..
2300A/B/C and they likely all come from the same Chinese production backland... (attenuation & specs vary)
If these brands have sourced their models, from the same backland in China.. I don't know, but It wouldn't surprise me, a lot of denominators between them.
* U1562A KEYSIGHT Agilent 300MHz/3½KV (Blue & Grey variant)
* Hioki 9666 Probe (100:1) 200Mhz 5KV (blue) https://www.testequity.de/product/33673-1-9666
* Peakelect P2301C 300MHz 5KV (blue & Red)
* Cleqee P2301C 300MHz 5KV (Red)
* It also seems to be the same 100X model that is highlighted as an accessory for a lot of isolated handheld scopes. fx Siglent SHS800 (blue variant) and also Keysight Agilent U1604B where the datasheet highlights that it also exists in an X100 variant that can manage a tad over 3½KV / 300MHz.
Likely also why, these probes aint labeled with any brands..there is nothing in this product that says "Cleqee".. they come in the standard transparent pouch envelope that any vendor could bundle with a given scope.
I get that some users really don't like these "no name" products, and will gladly pay 5x or even 10x for that "brand-label" of the exact same item from a reputable seller, and it also makes sense when it comes to test gear, not least for HV, where you really dont wanna chance it, and you as an individual or as a responsible company need a certain assurance that tolerances are met.'
Are Keysight older passive probes made in China.? (this 300MHz U1562A were made obsolete 2 years back by a new 500MHz B-model)
https://www.keysight.com/us/en/product/U1562A/passive-probe-100-1-300-mhz-1-2-m.html
Kean:
OP, can you tell us what your goal is?
Do you just want a cheap 100x probe that you could occasionally use for a few kV?
Do you need to probe fast signals? How fast, and does it need a 100x 5kV probe?
Is it for hobby or professional use?
If you didn't see it already, Joe Smith does a test to destruction (unintentionally) & teardown of a P4100 probe.
It didn't handle handle the published derated specs.
I personally very rarely look at signals over about 50V, and when I do I try to stick to using test gear specifically designed for the purpose (e.g power analyser).
I have a Cal Test CT2707 100x 1200V 250MHz CAT 1 probe, but being CAT 1 would only be using that carefully on isolated & protected stuff. They have some 100x & 1000x CAT II HV probes.
I also have a Pintek HVP-15HF 10/20kV 50MHz probe which I've only used a couple of times in the more than a decade I've owned it.
Generally if scoping something with higher voltage I'll grab one of my differential probes (Pintek and Micsig).
Of course, that doesn't mean I haven't done things in the past that I now know wasn't so smart. I damaged my 121GW DMM for example when measuring the output of an ultrasonic driver without thinking.
janoc:
--- Quote from: DaneLaw on October 24, 2024, 10:01:19 pm ---I get that some users really don't like these "no name" products, and will gladly pay 5x or even 10x for that "brand-label" of the exact same item from a reputable seller, and it also makes sense when it comes to test gear, not least for HV, where you really dont wanna chance it, and you as an individual or as a responsible company need a certain assurance that tolerances are met.'
--- End quote ---
If it was only a rebrand of a generic product it would be fine. But are you sure that is the case? eBay and AliExpress is full of knock-off products that look identical to the "good stuff" - and are utter crap inside. When one buys this kind of probe from Hioki or Agilent, one pays premium because the ratings on the probe are actually tested and real. Would you trust the $29 probe from eBay to have that? That probe certainly hasn't seen any lab.
I don't mind buying no-name "white box" stuff, I am also not made out of money. But when it comes to safety relevant gear like this, that is a major hazard and saving in the wrong place, IMO. Obviously, if the OP isn't planning to actually use the probe to the rated specs, then it will be possibly OK - but then why to buy such probe in the first place?
DaneLaw:
Finally found confirmation on who makes them P2300C/2301C, and as speculated, it isn't Clegee who is the actual maker of these passive probes, Cleqee looks to be a reflipper, and sells various third-party Chinese products.
It is the behemoth "Zhongce" that is listed as the actual maker of all these passive probes X10, X100, X1000, and seems to supply many of the bigger brands with passive probes, they even highlight that they are making these exact models for Keysight Agilent and why Zhongce can highlight that they meet "Keysight Agilent European std " (thumbnail below)
The specifications is also very similar.
Keysight Agilent [U1561A X10-16pf] and [U1562A X100-6.5pf] versus [P2301B X10-16pf] and [P2301C X100-6.5pf]
Also looks like some "non-official" Keysight Agilent resellers, are using this loophole, with qoutes. (*its from a non-authorized line, and even highlight 299GBP/390$ as normal value)
https://www.radwell.co.uk/Buy/KEYSIGHT%20TECHNOLOGIES/KEYSIGHT%20AGILENT%20HP/U1562A?
https://www.radwell.co.uk/Buy/KEYSIGHT%20TECHNOLOGIES/KEYSIGHT%20AGILENT%20HP/U1561A
When I looked into getting myself an X100 probe a year or two back, I couldn't find a better X100 probe than the P2300/1C series that back then could be had for 34$ and without EUVAT, your down around 26$, so a fraction of what they are being sold for, when sold under the bigger brands.
Other models I was looking at, was from Testec (German brand), they also carry some passive X100 probes at attractive prices and got numerous resellers i Europe.
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