When on a limited budget, choosing a digital multimeter (DMM) is a surprisingly difficult decision, for various reasons, among others the vast choice of models from different brands in the low end.
Also there are numerous, detailed reviews of high-end, extremely expensive DMMs, but when it comes to low-end DMMs, the "reviews" often consist of an "unboxing" and general comments on the functionality and ranges.
Thankfully, HKJ here in this forum has a website with detailed reviews of a large number of both low end and high end DMMs, and I have selected and purchased two of the DMMs he has reviewed, mostly based on the information he provided.
https://lygte-info.dk/info/indexDMMReviews%20UK.htmlIn what follows I will explain the logic of purchasing two DMMs instead of one, and the reason I have chosen the UNI-T UT125C and the Aneng AN870. But first the HKJ reviews:
1. UNI-T UT125C :
https://lygte-info.dk/review/DMMUNI-T%20UT125C%20UK.html2. Aneng AN870 :
https://lygte-info.dk/review/DMMAnengAN870%20UK.htmlTotal Budget of 46€ (approx. $50) : 15€ for the UNI-T UT125C and 31€ for the Aneng AN870 (actually 26.50€ for the AN870 + 4.50€ for an extra set of leads). Shipping from China and VAT included in these prices.
A few comments about these two very different DMMs and why - to me - they are complementary.
UNI-T UT125CThis is a small 4,000 counts autorange handheld DMM with fixed (non-interchangeable) leads. The main features that caught my eye in HKJ's review are:
1. It has rather decent input protection: 2 PTCs and 3 MOVs. It also uses a large ceramic fuse. Also the PTCs are shrouded in the unit I received (see attached picture).
2. Despite its small size, the display is relatively large and very readable. There is also a backlight.
3. It uses 2x AAA batteries with decent battery life, not the expensive and short-lived 9V batteries.
4. It is independently certified and rated CAT III 600V. * (see note below)
Upon receiving it, I noticed that the NCV detection is always working and at least for me, it works quite well. The plastics have a good feeling and the leads and rotary switch are OK, but not great.
I noticed the unit I received is slightly different internally from the unit HKJ reviewed (it has an extra diode in the input section apparently, see D4-D5). In the hand, the UT125C feels like a solid little piece of equipment.
Main usage for the UT125C will be "field use" around the house and occasionally when I have to measure high AC or DC voltages in my projects. If I would ever need to measure mains AC currents, I would buy an AC clamp meter.
Aneng AN870This is a large 20,000 counts TRMS autorange handheld DMM. The main features that caught my eye in HKJ's review are:
1. Decent accuracy in DC voltage ranges.
2. Many functions.
3. Uses 2x AA batteries, with decent battery life.
4. Large, easy-to-read display with decent backlight (that stays on).
5. Poor input protection (a single PTC and a pair of clamping transistors), but at least it has two decent size ceramic fuses. This DMM is not independently certified, so the CAT IV 600V rating is fake. In my opinion it should not be used for anything involving mains/high voltages.
Upon receiving it, I noticed that the plastics have a rather cheap feeling and the included test leads are, quite honestly, total crap. So I bought a separate pair of inexpensive silicone leads with gold tip probes and these are very nice. The AN870 continuity detector is very fast and works well with the golden tip probes. I bought the golden tip silicone leads as recommended by Fungus here on the EEVblog forum. In the hand, the AN870 feels reassuringly heavy. Mine came with a simple pouch and a thermocouple probe.
Main usage for the AN870 will be as a general purpose DMM for my DIY electronics / microcontroller projects.
Why two multimeters?The logic here is to use the right tool for the right job while staying within a small budget of < 50€. The UT125C will be used for anything involving mains voltages (230V here in France) whereas the AN870 will be used for my small electronics projects where voltages rarely if ever exceed 20V.
On a separate note, if my budget were around 210€, I would buy a Brymen BM869s which joeqsmith has stress tested and reviewed thoroughly.
https://brymen.eu/shop/bm869s but perhaps I would still buy the UNI-T UT125C to throw in the toolbox. Btw a replacement fuse for the BM869s costs as much as the UNI-T UT125c with shipping and VAT, which I find somewhat absurd.
Attached some pictures, many more are available on HKJ's website. Picture 4 shows the difference in size between the digits on the UT125C and the AN870, as well as the silicone test leads that I purchased separately to replace the original crappy ones that came with the ANENG AN870. Picture 5 shows the internals of the AN870, which are almost identical to the one reviewed by HKJ (the 20A current shunt shape has changed, as far as I can tell).
* Note about the independent certification of the UNI-T UT125C
On the back of the UT125C we have the certification symbol and the Intertek name.
I have confirmed that the UT125C has been independently tested and certified by Intertek, as can be verified here:
https://ramuk.intertekconnect.com/WebClients/ITS/DLP/products.nsf/4c8700f3b75987a08525777700583333/1d393ddebcfb5489862586280014abff?OpenDocument