

⚡ Power Your Projects with Precision and Confidence!
The AstroAI Digital Multimeter AM33D delivers professional-level electrical testing with 2000 counts resolution, measuring voltage, current, resistance, continuity, and diode functionality. Designed for both industrial and household use, it features double fuse anti-burn protection, a silicone shock-resistant cover, and a backlit LCD for easy reading in low light. Battery powered and compact, it’s the essential tool for millennial managers who demand accuracy, safety, and versatility in their tech toolkit.













| ASIN | B01ISAMUA6 |
| Best Sellers Rank | #210 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1 in Multi Testers |
| Brand | AstroAI |
| Brand Name | AstroAI |
| Color | Blue |
| Customer Reviews | 4.5 out of 5 stars 53,695 Reviews |
| Included Components | 1 x AstroAI AM33D Digital Multimeter, 1 x 9V 6F22 Battery, 2 x Test Leads, 1 x User Manual |
| Item Dimensions | 5.12 x 2.87 x 1.46 inches |
| Item Type Name | AstroAI Digital Multimeter with Ohm Volt Amp and Diode Voltage Tester Meter (Intelligent Anti-burn) |
| Item Weight | 0.15 Kilograms |
| Item dimensions L x W x H | 5.12 x 2.87 x 1.46 inches |
| Lower Temperature Rating | 32 Degrees Fahrenheit |
| Manufacturer | AstroAI |
| Maximum Operating Voltage | 500 Volts |
| Measurement Type | Multimeter, Voltmeter |
| Minimum Operating Voltage | 2 Volts |
| Model | AM33D |
| Power Source | Battery Powered |
| Specification Met | Iec 61010 |
| Style | Multimeter |
| Style Name | Multimeter |
| UPC | 756910381981 |
| Unit Count | 1.00 Count |
| Upper Temperature Rating | 104 Degrees Fahrenheit |
| Warranty Description | 1 Year Warranty by AstroAI |
C**S
Great value and worked as expected
I recently had to replace a sprinkler control box which was hard wired into my house fuse panel. I purchased this multimeter to be sure I was safe working with that amount of electricity. I am happy to report that the job is done and I am still alive, so the multimeter worked as expected. The price was hard to beat and it felt like better quality than I was expecting. Happy with this purchase. Very easy to use.
H**L
Great price and value, couldn’t ask for more!
Wow! I’d tried 2 other brands to find this little gem that does what it does. Solid, does everything I need it to do, great price, looks and feels solid, love the attention to details like an awesome case, tip covers to keep them protected and lead covers as well, arrived quickly and got to work right away. Great product, great value.
C**R
Works for testing grounding mats, but cord length and instructions need improvement
I purchased this to test whether my grounding mat was actually working, and in terms of functionality, it does what it’s supposed to do. I was able to confirm that my mat is grounded. However, I ran into a few usability issues that are worth mentioning for anyone considering this, especially if you’re not familiar with electrical tools. The wires are not long enough to easily connect to the grounding port without lifting the device up. In my case, the outlet is positioned much higher than normal, which made it impossible to keep the tester flat on the bed while connected. Because of that, I couldn’t touch the mat properly while it was hanging between the outlet and the bed, which affected the measurement setup. To get a usable reading, I had to touch the mat with my foot instead, which worked, but wasn’t ideal. Another challenge was the instructions. They were not very beginner-friendly. I’m not an electrical tech person, so I had to watch YouTube videos and read online guides to fully understand how to use the tester correctly. Pros: Confirms whether a grounding mat is working Once set up correctly, it provides accurate results Useful tool for grounding verification Cons: Wires are too short for some outlet setups Difficult to use if outlets are positioned high Instructions are not clear for beginners Who this is best for: People who already have basic electrical knowledge or a standard, low outlet setup. Beginners may need additional guidance. Overall: The product works and serves its purpose, but longer cords and clearer instructions would greatly improve the experience especially for first-time users.
D**S
Effective and Affordable Multimeter - would recommend!
I grabbed this multimeter for some basic home and automotive troubleshooting, and it’s been surprisingly solid for the price. The readings are consistent, the display is clear, and switching between modes feels tactile and intuitive. It’s not a high-end professional tool, but for everyday electrical checks, battery testing, and DIY projects, it does exactly what it’s supposed to. Simple, accurate, and budget-friendly. Definitely worth it if you need a reliable multimeter without spending a ton. Love that it's not too heavy and it's compact size.
P**O
Battery Testing for home use
I bought this primarily for my wife and me to test batteries. We are not electricians. What I like is that the meter tells you in English whether the battery is good or bad. So you don't have to interpret numerical screens to figure this out. Easy for the non-electrician! Of course, it does all the other stuff too, like testing for voltage/current. The MANUAL that comes with the unit is excellent: unlike other meters for the electrically savvy, this one explains everything in plain English. Ease of use and price earn my recommendation.
R**H
Easy to use and has directions
Very nice multi meter and easy to use. I would recommend this multi meter and the price point was very good I ordered 2 one was a Christmas present and one for myself. The website said that their was a newer version of this model but it also cost a little more so I ordered the original model and am happy with it.It is a basic multi meter good for use around the house and garage. Would recommend and buy it again.Thanks!
S**E
Easy to use no issuesp
Perfect for price works great
P**N
THIS UNIT HAS EVERYTHING GOING FOR IT !!!!
Beautiful design, rubberized body very easy to hold and light weight. I found the ability to backlight the readings is the very best I have ever seen, this feature would sell me instantly. Would definitely purchase again and would highly recommend due to apparent quality and ease of use. One last note; the probes are very well made. For the surprisingly low price this is a fine unit.
Trustpilot
3 weeks ago
2 days ago