Signstek = Uni-T - Page 1
Forum section: electronics / testgear

author: testuser1
author_rank: Newbie
timestamp: May 12, 2022, 09:47:25 pm
content: Hi,First I have to say I'm new here so hopefully this is the right Sub to post this.I've bought this Signstek UT139C Multimeter:https://www.amazon.de/Signstek-UT139C-Digital-Multimeter-Bedienungsanleitung/dp/B08BZJZQ6P/ref=sr_1_2?__mk_de_DEIt looks exactly the same to the original Uni-T UT139C. I think they are basically the same meter, just rebranded. Does anyone know if this is true or did I indeed buy a fake one (i mean its not really fake because it doesn't say UNI-T at all, but you get the point)?Also: I've never heard about Signstek but their meter is pretty good for the price. Why aren't they more popular?

author: tunk
author_rank: Super Contributor
timestamp: May 12, 2022, 10:13:02 pm
content: Don't think they're exactly the same; the Uni-T is 6000 count and this lookslike it's 20000 count. Open it and post photos - maybe someone can give moreadvice.Edit: Looking a bit closer at the link, the photos show a 20000 count meter,but the description says 6000, so they could be the same.

author: AVGresponding
author_rank: Super Contributor
timestamp: May 13, 2022, 01:56:04 pm
content: The fifth pic shows a 4-digit display, with the sixth pic showing a 4-digit display on the box and the meter out of the box with a 5-digit display!I'd guess it's a rebranded Uni-T, I've seen a few, TIS is another, off the top of my head.+1 to the request for internal pics!

author: testuser1
author_rank: Newbie
timestamp: May 13, 2022, 03:46:55 pm
content: Here are some pictures of the internals:The circuit seems to be the same, only some components are different. Maybe a non EU-Version of the UNI-T meter?

author: Fungus
author_rank: Super Contributor
timestamp: May 13, 2022, 07:15:28 pm
content: I thought many Uni-Ts came in different flavours, denoted by the letter.The 20000 count ones end with an 'E'. Maybe it's a UT139E or something.

author: AVGresponding
author_rank: Super Contributor
timestamp: May 13, 2022, 07:21:51 pm
content: Quote from: Fungus on May 13, 2022, 07:15:28 pmLook at pic 6. It has both 4 and 5 digits. I suspect overenthusiastic marketing in the listing. In any case, the Uni-T 139E had 4 digits, the same as the 139C.EDIT: Here's a pic of my Unit-T 139C board, purchased maybe 5 years ago. Note the board number; mine is 190612-4, testuser1's is a 190612-5, so the next revision by the look of it. Mine also has the BOB on the other side of the mainboard. The input protection seems about the same.Needless to say, I only use mine for low energy stuff; I use a Fluke if I am prodding at something dangerous...

author: testuser1
author_rank: Newbie
timestamp: May 13, 2022, 07:30:38 pm
content: It's definitely 6000 counts. The pictures on Amazon even show a bar graph which the multimeter doesn't have so I guess the display part in the product photos is edited (the case seems to be real though).

author: Fungus
author_rank: Super Contributor
timestamp: May 13, 2022, 07:40:19 pm
content: Quote from: AVGresponding on May 13, 2022, 07:21:51 pmObvious photoshop. The display isn't even aligned with the case!

author: testuser1
author_rank: Newbie
timestamp: May 13, 2022, 07:47:40 pm
content: Yeah and the multimeter isn't even turned on in this picture so the display should be empty (apart from the missing probes)

author: AVGresponding
author_rank: Super Contributor
timestamp: May 13, 2022, 07:59:58 pm
content: Maybe the 5-digit display is just a picture printed on the screen protector, it would also explain the wonky alignment...