AstroAI
AstroAI AM33D Digital Multimeter
8.4 / 10
The inexpensive first meter that covers every check a kit builder needs.
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Multimeters Best Value Multimeter
AstroAI True RMS 6000-Count Auto-Ranging Multimeter Review
Reviewed by Kerem Başbuğ · Last updated September 28, 2026 · How we rank
8.8 / 10 · our score
A 6000-count True RMS meter that picks its own range and adds capacitance and temperature to the usual voltage, current, resistance and continuity. It is the sweet spot for hobbyists who want one meter that covers electronics and household jobs.
Quick Specs
- Brand
- AstroAI
- Category
- Multimeters
- Price tier
- Budget ($)
- Our score
- 8.8 / 10
- Best for
- Hobbyists who want a single meter for electronics, cars and home troubleshooting.
Our verdict
This is the meter most hobbyists should buy. Auto-ranging means you choose what to measure rather than which range, True RMS keeps AC readings honest, and capacitance mode lets you check a suspect capacitor before blaming your soldering. It costs only a little more than a basic meter and removes the two things that make basic meters frustrating.
Pros & cons
Pros
- Auto-ranging removes most dial fiddling
- True RMS reads AC accurately on non-sine waveforms
- Capacitance and temperature modes included
- 6000-count resolution for finer readings
Cons
- Auto-ranging is slightly slower to settle than manual
- Not a replacement for a professional-rated meter
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Key features
- True RMS, 6000-count display
- Auto-ranging
- AC/DC voltage and current, resistance, continuity
- Capacitance and temperature measurement
What's in the box
- True RMS auto-ranging multimeter
- Test leads
- Temperature probe (check the current listing)
- Battery and user manual
Contents come from the current Amazon listing and can change — check the listing before buying.
Getting started with the AstroAI True RMS 6000-Count Auto-Ranging Multimeter
Use auto-ranging for everything at first, and switch to manual range only when a reading keeps hopping between ranges. Discharge capacitors before measuring them — a charged electrolytic can give a false reading or damage the meter. Keep a note of the resistance your test leads read when shorted together, and subtract it when you measure very low resistances.
Who it's for
Hobbyists who want a single meter for electronics, cars and home troubleshooting.
Alternatives worth considering
AstroAI AM33D Digital Multimeter
Cheaper still if continuity and voltage checks are all you need.
Fluke 17B+ Digital Multimeter
The buy-once professional option, with a safety rating and build quality for serious electrical work.
AstroAI True RMS 6000-Count Auto-Ranging Multimeter: common questions
What is True RMS and do I need it?
True RMS meters measure the real effective value of AC signals, including distorted waveforms from dimmers, motor drives and switching supplies. For batteries and DC electronics it makes no difference; for AC and anything with modern power electronics, it gives more trustworthy readings.
Is auto-ranging better than manual ranging?
For most people, yes — you pick the quantity and the meter picks the range. Manual ranging can be marginally faster for repeated readings at a known range, which is why some experienced users still prefer it.
Can it test capacitors from a kit?
Yes, within its capacitance range. Discharge the capacitor first and measure it out of circuit where possible, since other components in parallel will distort the reading.
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