The CAT rating is a safety specification, not a quality grade · review
AstroAI Digital multimeter with ceramic fuses review
A compact meter whose distinguishing specification is its protection: a double ceramic fuse stated as flame-retardant, plus a silicone sleeve, at fourteen euros.
The bottom line The fusing is the reason to pick this over its neighbours. It is also the only meter here that mentions its fuse at all.
Fourteen euros, and the only listing in this hub that talks about the fuse.
What the manufacturer publishes
Accurate measurement of AC and DC voltage, DC current, resistance and diodes. A sampling rate of two measurements per second and a 0.6-inch backlit LCD. A data-hold function, a low-battery indicator and an audible continuity tester. A double ceramic fuse, stated as flame-retardant and protecting against overload, and a silicone sleeve protecting the meter.
The component nobody advertises
Ask what fails dangerously in a multimeter and the answer is the current input. Put the probes across a live supply with the meter set to amps, and the only thing between you and a short circuit is the fuse. Ceramic, sand-filled fuses are specified for that job; glass ones are not. This is the only listing among five meters here that names the type.
What is still not stated
No measurement category, no true-RMS, no AC current. The first is a safety specification and its absence is the pattern of this whole hub; the other two are capability limits that put this meter firmly in the household and hobby band.
Availability
On sale from 10 € to 20 € on the German, American, British, French, Italian and Spanish Amazon stores at the time of checking.
Prices and availability are what Keepa reported on the date this page was updated; both move.
Prices quoted in this text were read on 31 August 2026. The live price is at the top of the page.
What we like, and what we don't
Strengths
A double ceramic fuse, stated as flame-retardant and protecting against overload — the right fuse type for a meter
A protective silicone sleeve included rather than sold separately
Audible continuity, data hold and a low-battery indicator
A stated sampling rate of two readings per second
On sale across all six markets
Compromises
No measurement category published
A 0.6-inch display, the smallest in this hub
No true-RMS and no AC current range
Specifications
Amazon reference
B01ISAMUA6 (identical on 6 markets)
EAN
0756910381981
Voltage measurement
AC/DC voltage
Current measurement
DC current
Functions
resistance · diode
Fuse
double ceramic fuse
Questions people actually ask
Why does a ceramic fuse matter?
The fuse in a meter's current input is a safety component. A ceramic sand-filled body is specified where the meter must interrupt a high-energy fault; a glass fuse of the same current rating does not do the same job. AstroAI states double ceramic fusing, which most meters at this price do not mention at all.
What category is it rated to?
The listing does not state one. Follow the manual supplied with the meter, and treat the absence of a published category as a reason to keep it away from anything beyond a socket outlet.
What does two samples per second mean?
The display updates twice a second. On a changing signal that is slow, and it is the normal rate at this price.
True RMS · 6000 counts · 600 V · temperature, capacitance and frequency
A true-RMS meter with 6000-count resolution and the widest function list here — voltage, current, resistance, temperature, diode, continuity, capacitance and frequency — with probe caps included.
Best for: Household and light installation work where waveforms are not clean and the reading has to be right.
A true-RMS auto-ranging meter that lights the correct input socket in green for the function selected — the one design idea in this hub aimed squarely at the mistake that damages meters.
Best for: Beginners and shared toolboxes, where the lit jacks stop the mistake that kills meters.