Signstek MESR-100 V2 Auto Ranging in Circuit ESR Meter Capacitor Tester/Low Ohm Meter Up to 0.01 to 100R, Support in Measuring Capacitance Resistance Circuit

I'm am amateur at repairing circuits, but this device is great for testing capacitors in circuit which is very helpful. I've already repaired a few devices with it by finding bad caps. The only tricky issue with this tester are the short leads which others have pointed out, but that is due to it being so sensitive that the leads must be short for it to work. You can snip off a short piece of wire and put in each alligator clip to make the test leads a little more useful for getting in hard to reach areas. Overall this tester is a must have for doing any circuit repair, especially looking for bad caps.

I needed a meter to test my capacitors and it worked as it should. Small in size but worked cas well as more expensive models.

Good product

I do electronics repair as a second job. This is a great tool for troubleshooting and saves me a lot of time. Bad capacitors are a frequent problem but they are difficult to test and I don't have the time to just replace every capacitor I run across on finicky equipment.PROs:Tests capacitors better than a multimeter without having to desolder them.Posts the results in plain English as well as the numeric readings.It's reliable. I have tested quite a few capacitors so far and the results so far are accurate and repeatable.It's inexpensive. I shopped around for a quality ESR and found that units typically cost more than this, have to ship from China or Russia, and frequently don't have as many features.CONSs:The battery door is difficult to get to. The stand is in the way. It's a minor hassle. I plan to just remove the stand entirely as I do not use it.It's not extremely precise, particularly on small capacitors. Caps below a certain point you have to look up on a table (which is handily printed on the unit). The numbers can vary a little but not enough to make a difference for what I'm testing. All I want to know is the answer to one question: "Is this a good cap?" It's precise enough to be accurate in answering this question and that is all I care about.

I have used this meter now to test over 500 capacitors and it has performed flawlessly. The only situation I would advise users of is not to relay only on the auto-ranging capability of the meter. Auto-range works great but for some capacitors the ESR is close to the limit of two ranges and the meter will jump back and forth trying to resolve the resistance. If this occurs simply press the mode range button once or twice until the reading stabilizes. This meter can be used for in-circuit testing of capacitors as well but so far I have not needed it for that.

Does what it says, I still prefer and HVAC multimeter.

I have many pieces of electronics that stopped working. Sound Bar, Electronic Whoopers, Sirens used in security protection systems plus a number of others. I don't have the time to spend diagnosing their problems because it is much simpler and faster to just go out and buy another one.One day while watching a You Tube video on electronics repairing for the non-professional, the host was demonstrating the use of this Signstek MESR-100 Ver2 ESR Meter with in-circuit testing. He stated that quite often that electronic equipment fails or failed because electrolytic capacitors were the culprit and this meter can check each capacitor in-circuit - which means I wouldn't have to remove each one to check it. Wow, my first impression was now I can repair the above quickly and save money in the process. Well, I didn't find (not one) failing or failed capacitor. OK, I must admit the cables are far to SHORT in length. I was dragging the meter all over the circuit boards attempting to check each capacitor. Each time I would finally make contact with (cable probes to a capacitor) the short cables turned the meter upside down or on its side to prevent me from seeing the display which would define information I need to determine if the capacitor was good or bad. This occurred too many times at which I promptly put the meter and cables back in the box and put it away. The cables make testing electrolytic capacitors a "NIGHTMARE" in circuit. Testing out of circuit is just fine and the meter tested every good electrolytic capacitor I had correctly.So, if the cables were longer this meter would probably warrant a five. Again, the meter appears to be a "near professional instrument" except for the cables which defeats the whole purpose of using it... in-circuit. Also, I believe the instructions have a statement to not substitute the cables supplied with longer ones.I am hoping either the manufacturer or a professional electronic technician will offer a solution for longer cables that would make this meter an excellent tool for diagnosing bad electrolytic capacitors in-circuit.

Worked great the first few weeks then 1 week after return window closed to Amazon, the unit has failed and will not check capacitors anymore. Simply terrible. A real waste of money. :-( Not recommended to say the least.