AstroAI
AstroAI AM33D
If you just need to check battery voltage and continuity, the AstroAI AM33D gets the job done for $23. It's not true RMS and the manual ranging will annoy you. But it's a meter that'll live in your toolbox for exactly when you need to quickly check something without worrying about damaging it.
Average RMSCAT II 600V2,000 count
7.0/10
Buy on Amazon · $23$22.99
Specifications
| Display Count | 2,000 |
| CAT Rating | CAT II 600V |
| DC Voltage | 0.1mV – 600V |
| AC Voltage | 1V – 600V |
| Current | 0.1mA – 10A |
Features
✗True RMS
✗Auto-ranging
✗Capacitance
✗Temperature
✗Frequency
✓Diode Test
✓Continuity
✗Bargraph
What We Like
- ✓Cheap enough to keep one in the car, shop, and toolbox simultaneously
- ✓Correct basic measurements for voltage, resistance, and continuity
- ✓Large, clear LCD display is easy to read in various lighting
- ✓Includes probes and 9V battery — actually ready to use out of the box
- ✓Safe enough for a first-time multimeter user to learn on
Limitations
- ✗Not true RMS — readings on AC loads (motors, dimmers) will be inaccurate
- ✗Manual ranging is slower than auto-ranging for quick checks
- ✗CAT II 600V only — not for panel or industrial use
- ✗Limited to basic measurements (no capacitance, no temperature)
AstroAI AM33D
$22.99 — CAT II 600V · 2,000 count