AideTek VC480C+ 3 1/2 Precision Milliohm Milli-ohm Meter Backlight 0.01mΩ to 2K 4-wire test lead

I bought this 2 years ago to see what you get for around $100. I was pleasantly surprised. Yes it is manual adjustment, no-frills instrument. You could adapt any decent meter with some external circuitry to do the same thing; but you would have to spend more than $300 in time and materials. (It would be a nice Arduino project, but what's the point -- you need to measure something.) I tried it with some precision low value resistors; it is accurate to its specifications. I meant to write a review at that time, but forgot. Fast forward to 2 years later after I left the batteries in the meter: I took it apart to try to salvage it from the damage done my negligence. The design is very nice and well thought out. It was easy to recover from my abuse. Did some spot checks to confirm that tolerances were still good. Then to the task at hand. A copper sheet that had been annealed (unprofessionally) needed to be measured to see if it was still electrically good. Should be 575 micro ohms. Measured 580 micro ohms. So I am very pleased with this product. If you occasionally have a need for low resistance measurements, this is the best instrument for the money. You probably want to make your own test leads to measure test points that are separated by more that 1 meter. Procedure: Null, measure, confirm null. It will drift; so always confirm null.

I needed this to measure the milliohms of inductors - specifically hand-wound toroids for a transmitter. I was able to accurately simulate the circuit with both the inductance measurement and the milliohm reading.Before I did this project, I never needed (or so I thought) a meter that can measure down to below a single milli-ohm. Turns out you can use this to locate shorts on a PCB. I will no doubt not use it a lot, but when you need it, you really need it. Works very well, very easy to use, and the backlight stays on until you turn it off.

Measures with dc so inductance is no issue. The Kelvin leads that are included are good and other brands are compatible with the inputs. The backlight and display make for very clear reading. It does not eat batteries. Accuracy is very good and can be a very useful instrument . I like mine a lot.

Operates on six AA batteries or can be powered by a 9 volt adapter such as a Arduino 9 volt power supply. (+ Polarity) (5.1mm barrel) Which is what I use for it. The milli ohm meter comes with a calibration certificate from the factory.

This appears to work well and for the price one can hardly complain. I'm using this for measuring shunt resistors and field winding in DC motors. I can't find fault with it beyond the cheap leads and that there is no case for them.The battery layout is weird but functional....Basically for the price it seems to be a good piece of kit to add to one's home lab etc..