Fnirsi TMP-600 & TMP-610s (DM40 Clone)

[MTT97]

I was about to get the Alien Tek DM40 because it has everything that i wanted from a multimeter except for the 10Mhz bandwidth oscilloscope which isn't for me personally. However i just found out that Fnirsi not too long ago released what it seems like a clone of the DM40-C. interestingly, they also have a version (TMP-600) without the oscilloscope which cost a lot less. There isn't many reviews of it yet, but i found a couple chinese reviews. It looks very responsive just like the DM40, also has the short diode beeps which i'm interested in the most. If i'm not mistaken, the UI has few more tricks to it when the DM40 doesn't have.

Has anyone tried it yet, how was it?

The reviews that i was able to find:





Product link: https://www.fnirsi.com/products/tmp-610s


Edit: I was able to find a chinese comparison between the Fnirsi and the Alientek. TL:DR the Fnirsi is buggy and slightly slower than the DM40. NOTE: This video dates back all the way to 2026-01, so these bugs might have improved now with newer batches and firmware.

https://www.bilibili.com/video/BV1AWiXB5EDZ/

Edit 2: I found a Fnirsi official comment from early 2026-01-23. Here is the translation:


Hello everyone! Our new firmware has been released!!

The latest firmware version for the TMP-610S is V1.7.3, and the latest version for the TMP-600 is V1.6.1. Those who need it can download it from the official website or contact customer service to obtain it.

Regarding the issues shown in the video, the new firmware for the TMP-610S includes the following optimizations:

1. The measurement speed for AC + DC has been optimized.
2. The bugs shown in the video have been specifically fixed.
3. Since the TMP series trend graph contains a relatively large amount of data points, the graph naturally scrolls more slowly. In some usage scenarios, a trend graph with more data points is required, so this is not necessarily better or worse. The new version adds three adjustable time-base settings for the curve display, allowing users to adjust it according to their needs.
4. Regarding the issue of large temperature measurement errors, we are considering adding temperature calibration in future updates. Alternatively, users can contact customer service to send the device back for repair and factory calibration.
5. The diode buzzer indication has been optimized.
6. The new version adds three adjustable sampling speed levels for the multimeter, allowing users to choose the setting that best suits their needs.

In addition, this update also adds many useful new features! The original TMP-610S update log has also been included:

1. A completely new UI.
2. Added a table mode for the multimeter.
3. Added three adjustable levels for multimeter sampling speed and three adjustable levels for curve time base.
4. Added a small multimeter window display in oscilloscope mode.
5. Opened the multimeter communication interface, allowing communication via a USB virtual serial port.
6. Optimized the diode buzzer indication.
7. Fixed several known issues.

Once again, we would like to thank the reviewer for the detailed evaluation and everyone for their suggestions. Your feedback provided great help and motivation for this firmware update!

We also welcome everyone to continue providing suggestions and feedback on our products. We will continue working to create products that better meet everyone’s expectations!

[KungFuJosh]

There isn't that big of a price difference from what I saw on google. In any case, Fnirsi makes shiny trash. If you're okay with that, then go for it. If the DM40 is what you want, then look for reviews on it and see if it does what it claims or not.

[MTT97]

The TMP-600 without the oscilloscope, is less than half the price of the DM40-C (95€ from Fnirsi website compare to 210€ for the DM40-C on Ali).

[tunk]

You can get the 40000 count DM40A for around US$100 at aliexpress.
And as KungFuJosh says, Fnirsi doesn't have the very best reputation (some of their specs are lies).

[KungFuJosh]

The TMP-600 without the oscilloscope, is less than half the price of the DM40-C (95€ from Fnirsi website compare to 210€ for the DM40-C on Ali).

The DM40B is $123 USD on amazon. That allegedly has the oscilloscope.

[BillyO]

FNIRSI do have some products that do exactly what they say they will do.  However, this is hit and miss with them.  Unfortunately I have no experience with this product.  Hopefully someone that actually owns one will let us know if this is one of the better FNIRSIs, but I wouldn't rule them out yet.

However, I would ignore the CAT IV and CAT III ratings.  Unless it's UL, CSA or TUV listed, these mean nothing and are highly unlikely.

[Martin72]

What's this thing supposed to be good for?
It looks more like one of those countless toys the Chinese are flooding the market with.

[BillyO]

It is...

The DMM only version is a 60,000 count DMM with a BT interface.   

The other one has a 10MHz scope in it and a next to useless 50kHz signal generator.

They have done this same thing in one form or another a half dozen times.  I have no idea, other than the BT interface, what the attraction is here.  It certainly does not warrant the price they are asking for it.  At least in my opinion.

For just about $10 more they have a vastly superior device (2D15P) that has a bigger screen, a really nice useable UI, a 20,000 count DMM, a 2 ch. 100MHz scope and a 10MHz generator in a much better package.  It has no BT though, and has one bug that really needs to be fixed.  It does not represent rise time correctly below 4.2 MHz.  Above that, it's fine.

[KungFuJosh]

It's what Fnirsi does. They shit out as much as they can, then change the way it looks, and charge more for the new version.

[MTT97]

It is...

The DMM only version is a 60,000 count DMM with a BT interface.   

The other one has a 10MHz scope in it and a next to useless 50kHz signal generator.

They have done this same thing in one form or another a half dozen times.  I have no idea, other than the BT interface, what the attraction is here.  It certainly does not warrant the price they are asking for it.  At least in my opinion.

For just about $10 more they have a vastly superior device (2D15P) that has a bigger screen, a really nice useable UI, a 20,000 count DMM, a 2 ch. 100MHz scope and a 10MHz generator in a much better package.  It has no BT though, and has one bug that really needs to be fixed.  It does not represent rise time correctly below 4.2 MHz.  Above that, it's fine.

Correct me if i'm wrong, but based on the many reviews i saw, the continuity beep on the 2D15P has a nasty contact and release delay to it, and no beep on the diode mode. This is a big deal breaker for me personally. I do not care about the oscilloscope either, that's why i'm looking at the TMP-600 without the oscilloscope for a cheaper price.

The only other multimeter with responsive continuity beep and diode beep is the UT161E which i was consdering.

I couldn't find an equally responsive replacement for the DM40 that also has the diode beeps. You are free to suggest any similar or better at the same price or less if comes to mind. From the recent reviews that i saw, the Fnirsi TMP-600/610s got a massive UI overhaul with bug fixes, new features and QoL, it looks rather nice with the new update.

[Aldo22]

Like the DM40, it doesn't have 1μV resolution either.

[BillyO]

Correct me if i'm wrong, but based on the many reviews i saw, the continuity beep on the 2D15P has a nasty contact and release delay to it, and no beep on the diode mode. This is a big deal breaker for me personally.

The continuity delay is 50ms (1/20 of a second).  I would not characterize that as "nasty".  It's fine for most people.  If you are spending 8 hours a day running your probes down long lines of finely spaced contacts as quickly as humanly possible, it might not meet your needs.  If I were in that position I'd probably not be looking for a bargain basement unit and go for something a little more professional.

It does not beep for diodes.  I can only speak for myself on this, but I don't care about that as I'm usually looking at the meter to see the forward voltage drop.

The only other multimeter with responsive continuity beep and diode beep is the UT161E which i was consdering.

Are you suggesting that the TMP-600/DM40 and the UT161E are the only two meters in the world with a "fast" continuity response and a diode beep?  You can't be serious.   

I couldn't find an equally responsive replacement for the DM40 that also has the diode beeps.

We still do not know what "responsive" is.  Care to give us a figure?  Or are you just going by what someone on YT has said?

You are free to suggest any similar or better at the same price or less if comes to mind.

I'm not really here to advise you on the cheapest meter in the world that ticks all your "bench racing" specs.  As for mentioning the 2D15P, I was just making a comment in response to someone else WRT FNIRSI making a whole pile of these 3-in-1 devices and expressing that I thought the 2D15P was the best of them.  I was not suggesting you must buy one.  Personally, if you were in serious need of those two life saving specs I'd advise the BM786.  It costs a bit more than this, but I don't think it's much more than the UT161E.  Beyond that, if you don't want a 2D15P, don't get one.  Problem solved.

Maybe you can be the first to get a TMP-600 and let us all know how it works.

[BillyO]

Like the DM40, it doesn't have 1μV resolution either.

But it does have 1uA resolution. 

[Aldo22]

Like the DM40, it doesn't have 1μV resolution either.

But it does have 1uA resolution. 

No, it has a resolution of 0.01μA.

[BillyO]

I was talking about the 2D15P.

[Kvarkk]

Hello all,

I'm struggling to update the firmware in my TMP-600. The instructions in the manual are not clear:

3.5 Firmware Upgrade
①While the device is powered off, briefly press the【Power】button and then press the 【MENU】button
within 1 second to enter the firmware upgrade mode.
②Connect the device to your computer using a USB Type-C data cable.
③The computer will automatically recognize the device as a USB drive. Drag and drop the firmware file
into the drive.
④Once the upgrade is complete, restart the device to finish the process.


If I briefly press the【Power】button, the device will remain off. How can I press the [MENU] touch button if the device is powered off?
More, from the instructions above it's not clear how to start the FW update process. Should it start automatically?

What I've tried: connected the device to my PC, powered it on, entered settings, activated USB Sharing. The removable drive appeared, but I cannot copy the FW bin file to the drive - copying terminates as the device shuts down in 20-30 seconds.

Can anybody help me with the firmware update?

[BillyO]

Press the power button - keep it pressed, then immediately press the menu button.  Keep them both pressed until it enters the firmware upgrade mode.  The proceed to step 2.

[habsrepariert]

I' ve tested it, pointing out the difference between ohms and ohms'on' measure if someone is interested.
Further - signal generator again is only positive. A sinewave is not a real sinewave .
https://youtu.be/Q3XnAYNTJX4?is=_NIXFVqxAeCbWPgI
[url]https://youtu.be/Q3XnAYNTJX4?is=_NIXFVqxAeCbWPgI[url]

[Kvarkk]

Press the power button - keep it pressed, then immediately press the menu button.  Keep them both pressed until it enters the firmware upgrade mode.  The proceed to step 2.

This doesn't work. If you hold the power button, the device will keep turning on and off in a loop.

[ialbert]

Hi, a friend recently gave me tmp-610s. i upgraded using 3x power button press.

[ledtester]

https://youtu.be/Q3XnAYNTJX4?is=_NIXFVqxAeCbWPgI

Btw, when sharing youtube links you can remove the is=... part. It's just a tracking tag. They used to use si=... but switched to is=... In fact, just remove everything after the ?.

[Kvarkk]

Hi, a friend recently gave me tmp-610s. i upgraded using 3x power button press.

This method works perfectly, thanks a lot!