⚙️ Klein Tools MM400 Multimeter, Digital Auto Ranging, AC/DC Voltage, Current, Capacitance, Frequency, Duty-Cycle, Diode, Continuity, Temperature 600V Review

This Revain/Klein multimeter stopped working after 15 months. In particular, the backlight on the display stopped working, along with the auto-ranging feature. I called Klein Tools and they informed me that the product was covered by a 2 year warranty and that he should return it to the seller for a replacement. I've replaced the batteries and checked the two fuses, but they still don't work. Now I can find one at Revain.Com. LLC Services. to discuss the problem and get a replacement. My…

I really like this multimeter. It seems much more accurate than my old Harbor Freight multimeter. My only concern is the extra rare earth magnet mount with a faulty velcro strap (not included with this multimeter) which I had to hand sew as the velcro was dead on arrival, but that is a separate review of the product. Klein is a professional power tool and this multimeter hits the mark. Worth buying, just be prepared to hand sew the rare earth magnet mount sold separately as the velcro is…

I was a field technician early in my career and had a Beckman VOM that I bought in the 70's. That was great. Industrial quality, rubberized body and very accurate. Lately he's started making false statements to me. Of course nobody fixes anything these days and the company that did it is long gone. I first bought a cheap piece of shit online for $15. I was about to replace some of the components that power my 220VAC downhole motor and needed a meter to check the voltage at various points in the

Of course the MM400 is not a Fluke. but how many of us really need a Fluke? The typical home player needs a meter that can reliably answer three questions: (a) is this battery dead?, (b) is this outlet active? and (c) does this switch work? The MM400 answers these questions and more, making this autoranging meter an excellent value. And let's face it, if you walk through the electronics department at the Big Orange Home Center, Klein Tools doesn't come cheap. There's a lot to be said for a…

Bought MM400 to replace my aging Beckman Circuitmate DM27 which I used for general home use. I'm very happy with the Klein MM400, it's small and easy to use, has high quality sensors and looks solid. The simple dialing and auto-ranging feature make it easy to use, while the backlight on demand and auto power off to save battery are the features I was looking for in the new DVM. One downside is that by default, the device uses AC power to measure voltage and current. This makes sense as the…

I've been using these little orange electronics for a few months now and have some tentative opinions. a main meter (obviously) or even a serious DIYer. It mostly lacks range, overall accuracy, and true RMS functionality. However, for the home gamer or as a cheap backup for your Fluke, this little guy is pretty good. Pros: Readings are crisp and clear, and the backlight works beautifully. The wires are flexible and their ends will fit into household outlets when the CAT IV plastic covers are…