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⚡ Measure Like a Pro, See Every Detail!
The Proster LCR Meter AE121 is a compact, battery-powered digital multimeter designed for precise measurement of capacitance, resistance, and inductance with ±2%+5 accuracy. Featuring a rotatable LCD for easy viewing, data hold functionality, and included professional test leads, it’s engineered for efficient, reliable diagnostics in both field and lab environments.














| ASIN | B071WNNYQT |
| Best Sellers Rank | #53,723 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #68 in Multi Testers |
| Brand | Proster |
| Brand Name | Proster |
| Color | Yellow |
| Customer Reviews | 4.5 out of 5 stars 2,602 Reviews |
| Included Components | LCR Meter Set |
| Item Weight | 590 Grams |
| Manufacturer | Proster Trading Limited |
| Measurement Type | LCR Meter |
| Min. Operating Voltage | 9 Volts (DC) |
| Minimum Operating Voltage | 9 Volts (DC) |
| Model | AE121 |
| Power Source | Battery Powered |
| Style | LCR Meter |
| Style Name | LCR Meter |
| Unit Count | 1.0 Count |
| Upper Temperature Rating | 40 Degrees Celsius |
| Warranty Description | 18 months |
D**N
Worth the purchase!
I've always wanted an LCR meter! It works amazing! Very quick readings, well within tolerance of known good capacitors, inductors and resisters tested. The only thing that would improve it, is a side pocket on the case to put the probes in when not in use. Minor, really, but a great meter!
G**N
Very good for the money
Very happy with this meter for the price. I verified the readings with some standards and it is very close. I wanted it because of the adjustable screen but found it worked so well for the price it is on my work bench now.
A**O
Good tool if it works.
Good tool. Only concern is last one I bought in 2018 was dead in Aug 25 and in 7 years was not used very often. Properly stored, etc Hope this one last longer.
L**Y
large display, easy to use
surprisingly this is a very accurate LCR multimeter, covers the majority of the ranges needed for testing PCB components. and for the price it's definitely a good bargain!
J**R
Works Great
Works like a Charm, great value for testing Caps and Inductors.
P**E
This Thing is a Miracle at this Price - Don't Even Think; Just Buy It
So, I use this for my ham radio hobby, to build antennas, and to check the value of coils. I have a slew of text equipment ranging from the Super Mighty Harbor Freight free Red Multimeters that they used give away with a purchase to some of the better gear like my Fluke 87V, Fluke 77IV, Hitachi high end analogue oscilloscopes, etc. This thing for 30 dollars or so ( January 2026 ) is a miracle. The resistor values were spot on with my Fluke 87V. The fact is this is an LCR meter, not just a unit to measure capacitors, resistors, voltages, etc.. Even the included case is decent. The leads are not silicone, but still very flexible. I replaced them with Promasters, not that it was necessary. I am fussy about the quality of my leads and prefer Promaster and Fluke. Yeah, it costs more, but hey, why have a great meter and compromised leads. I've even swapped out my Simpson Model 260 and Model 262 leads for Promasters. So buy this thing and maybe consider upgrading the leads. The existing leads had a resistance of only 0.8 ohms which was more than half decent. They just were not as comfortable or as flexible as I like. I still give this unit FIVE stars
D**.
Very useful and a good deal
I needed to characterize some inductors and capacitors I had on hand, and came across this meter at a very attractive price. It has been working fine with the capacitors. Many of my inductors are from a grab bag, tiny coils in the single-digit uH range, and the meter hasn't worked as well with these -- I think test lead inductance is getting in the way. I probably haven't figured out the best way to measure these. The meter seems to be able to measure larger inductances, but I don't have a way of verifying accuracy at the moment. The meter is easy to use and has large, easy-to-read digits. There is nothing obviously fragile about it, but from reading the instructions and some of the reviews, I'm going to be careful with it. I think the inputs are probably not very well protected -- there shouldn't ever be voltage applied to them. In any event, it is cheap enough to be disposable if something happens.
H**1
A good value with a workaround.
Does a good job for the price. The insulated alligator clips are nearly useless because they can't attached to the probes. You can see inside that there isn't the usual socket that snaps onto the probe end. It's only the crimp for strain relief on the alligator clip is crushed flat to make contact with. All you can do is insert the probe and hope to make contact rather than attaching the probes so they can hang off a test point. The short probe for capacitance readings is decent but its leads carry too much capacitance to zero out. For small pF caps, I adjusted the probe capacitance to a nice number to make it easier to mentally subtract the value to get the actual reading. The values I read for parts were accurate enough to know if the capacitor under test was reasonably close to reading the indended value.
Trustpilot
4 days ago
2 weeks ago