KAIWEETS KE2500 Isolationswiderstandsprüfgerät

This is definitely a top notch megger. This has multiple uses including finding damaged underground wires before making repairs or starting a new construction. Not hard to understand and use especially if you're familiar with anything similar to to this. It has successfully and accurately gave readings, really reliable. Very durable as well. These can be quite expensive but this is a really good deal.

This is one amazing tool.
You can do so much with it.
With this tool you can test any type of insulation, you can see the potential degradation and get ahead of any faulty issues with insulation.
This little tool can give you readings with amazing accuracy and has been rated to work on commercial and industrial functionality.
It's light and durable so you can carry it anywhere with ease.
The price is incredibly reasonable and should last forever.
A great tool.

The KAIWEETS KE2500 megohmmeter has become my go to for preventive maintenance on HVAC units and motors with its wide 200G�� range and selectable voltages up to 2500V handling everything from residential wiring to industrial gear. One touch DAR and PI functions give quick insulation health insights saving hours versus manual timing and the pass fail indicator plus max min tracking spot weak points instantly. Auto discharge and voltage warnings make it safe for solo use and the backlit display reads clear in dim panels. Accurate on cables transformers and solar arrays matching my Fluke readings closely in tests. Rugged CAT IV build rechargeable battery and included leads case make it field ready. Excellent value for pro electricians tackling insulation faults.

Meter Itself:
Very impressive build quality, not as good as a Fluke Megger but a lot better that anything else I have seen in this price range.
The display is nice and big with both Analog and digital readouts. Everything is pretty clearly labeled and the backlight is bright.
It can produce 100-2500Vdc for testing insulation leaks.
Nice simple Test button and Timer button. I will explain the use below.
It also has a built in Auto Ranging Voltmeter for AC/DC voltage. The AC voltage is very accurate but the DC readings are not all that accurate.

It can be used as an OHM meter and a continuity tester. It also seems to have the ability to store readings in memory.
It has a built in DAR test mode (Dielectric Absorption Ration). I have never used that before but I believe it tests for moisture inside enclosures.
The case and Leads for the Meter are not bad. About my only gripe is that the Alligator clips inserts are not as secure on the leads as I would like.
I have another Kaiweets volt meter and it has lasted for awhile and endured abuse. This one has the same good build quality so I think it will also last.

Operation Usage:
This Insulation meter works the same as the rest. High voltage with low current limit is passed down a wire and if there are any insulation issues like cracks or cuts that are allowing water or moisture to get into the wire, it will pick up the voltage being leaked to the wire connected to the other lead.
The meter uses the standard 1 minute test and has a built in timer to perform the test. After 1 minute it then shuts off the high voltage. If you have used one of these then yes It is the same 100Mohm for 1 minute of testing for typical 200A utility mains wires. Anything below 100Mohm requires Finding/Replacing the bad wire.

Connect leads to open ended Neutral wire and one open ended phase wire with both running down the same conduit. Select Voltage level then Press Timer button then with nothing shorting or connected on both ends of the wire and they are clear from anyone touching them Press the Test button and it will countdown one minute while it tests the resistance. The way it operates is that simple.
Note that other kinds of wires and tests have their own requirements, hence why it goes to 200Gohm.

I think other reviewers have mentioned this. It uses high voltage but the current is limited to a low value so it won't kill you but it can give you a big shock like a cattle fence if you touch those leads while they are activated.

Over happy with it and the accuracy which I tested with the input resistance of a Fluke 87V meter which read 10Mohm as expected. I also like the fact that it has other functions built into the Kaiweets.

This is a pretty nice insulation resistance tester. It feels solidly made, the screen is large and easy to read, and the rotary selector has a nice positive feel to it. One of the things I like most is that it goes well beyond the basic 1000V range a lot of more affordable units stop at, so it feels a bit more capable for motors, cabling, and other situations where you actually want to know what the insulation is doing instead of just guessing.

It also seems pretty easy to use once you understand the basics of this kind of tester. You hook up the leads, select the test voltage, and run the test with the timer. The built in DAR/PI functions are a nice addition too, and it is convenient that it can also do regular voltage checks so it is not a completely single-purpose tool. The included case is nice, and overall it feels like a much more serious piece of equipment than I expected.

My main complaint is similar to what a few others have pointed out: for a tester that can output very high test voltage, some of the included accessories feel like the weaker part of the package. The leads and clip attachments seem usable, but they do not inspire quite as much confidence as the meter itself. I also wish this used a rechargeable battery pack instead of a pile of disposable batteries, especially for something that feels otherwise fairly modern.

Over all though, I think this is a good value. It is obviously not trying to compete with the really expensive professional brands, but it seems to offer a lot of the functionality most people would actually want at a much more reasonable price. If you need an insulation tester for shop use, electrical troubleshooting, motors, or occasional field work, this seems like a solid option.