
I already have the big brother to this meter and like it so much I tried this 4000 count one as well since the price is so low right now, I might like this smaller one a bit better than the larger one in some ways. For $17.99 and free shipping I simply have no real meaningful complaints, if any it would be the plugs would seem like they fit loose, but in all my testing and jiggling it does not seem to affect the electrical connection one bit, its just a result of matching this particular type plug in with the usual split jacks and the electrical connection itself doesnt show any effects from this it just seems to be the physical fit - ive never seen it affect the displayed number. I like this one as much or more than its big brother partly as this one has a better looking backlight. The blue backlight on the larger model has an odd washed out effect on the digits but the display is still very readable. This DT132A has a nice looking white backlight that I have no issues with other than like most it doesnt stay on long enough. As with its larger 6000 count brother theres a good deal of functionality here for the money, and ive found it very accurate in the main volt ohm cap ranges etc and it even reads temps without the thermocouple inserted if desired, and reads within 2 - 3 degrees - mine does at least. The continuity range has good volume, is reasonably fast and its even better after cleaning the tips with fine steel wool and alcohol. As with all meters in this price range theres little in the way of serious input protection, so use it accordingly its not an industrial plant meter its a home/hobby meter and given the price point and functionality im fine with that.
Positives
+even when stored in box, it is small enough to fit in tool chest
+display is large, backlit (optional), and easy to read
+probe leads are a good length,
+built in stand useful (my old meter didn’t have one)
+feels pretty sturdy (apart from stand)
+printed manual (not just online)
Negatives
-probe “points” are a little small (tough to use sides of points to make contact to measure)
-while in the sealed cardboard box, when shaken, it rattled. Thought maybe a spare fuse was loose. Took off case, took out seven screws, and found both fuses were free in the case. Easy to fix, but if yours rattles, open it up and seat the fuses properly.
You cannot beat the quality for the price. What they fail to mention is that the leads are extra long compared to others. That's a huge plus. The "kickstand" in the back is NICE. The digital readout is just the right size. The only drawback I have is that the "backlight" turns off too soon. It would be nice if the backlight stayed on until the unit went into auto-off or until the user turned it off. Other than that, five stars across the board.
Once this arrives, you can use your Amazon order # go to the AstroAI website to register for an extended warranty (no additional cost) for a total of 4 years.
Meter works as advertised, accuracy compares with other meters I have, temperature is as accurate as can be expected (using included thermocouple).
Price is decent. If you are considering this meter also consider the WH5000A model, slightly larger size and display.
Feature(s) missing for my ease of use.. built in probe holders.
For $28 this VOM is more than spectacular.
Actually it is a good buy for $128. It even has a termister to measure temperatures. Its DC/AC read seems accurate.

Feature Product
- Check out our VIDEO on the left side and take a quick tour of AstroAI Multimeter!
- WIDE RANGE of tests for AC/DC Voltage, AC/DC Current, Resistance, Continuity, Capacitance, Frequency and Temperature; Tests Diodes
- PROFESSIONAL LEVEL features include Auto-Ranging capability, and True RMS for measuring both AC Current and Voltage
- EASE OF USE: Convenient features like Data Hold, Large LCD Backlit Screen, Kickstand, and Low Battery Indicator make taking and recording measurements easier than ever before
- IDEAL FOR COMMERCIAL settings where it can handle the demands of a long workday, from the durable exterior to the wide range of heavy-duty capabilities
- SAFETY FIRST: Two integrated fuses rated at F500mA/600V and F10A/600V; Explosion-proof ceramic fuses provide maximum safety; The fuses can protect the multimeter effectively; Overload protection on all ranges
- 3 Year Warranty provided by AstroAI
Description
The AstroAI True RMS Multimeter is designed to be safely and accurately used by professionals in a commercial setting or weekend DIYer's that need a little more power utility from their standard digital multimeter. It's easy and safe to operate with advanced features built for measuring seemingly everything. Run tests on diodes while being able to measure voltage, current, resistance, continuity, capacitance, and frequency, all on one device. This multimeter is designed to be used in commercial settings, but can also be brought home to use with automotive or household electrical problems.
Specifications
Digital Display: 3 ¾ , 3999
Sampling Speed: 2 times per second
LCD Size: 55 x 31mm
Range Selection: Auto or Manual
Polarity Indication
Overload Indication
Low Battery Indication
Operating Environment: 32°F~104°F (0°C~40°C); <80% RH
Storage Temperature: 14°F~122°F (-10°C~50°C); <85% RH
Power: 3 x 1.5V, AAA Batteries Included
Dimensions: 145x70x35mm
Weight: Approx 157g
Safety/Compliances: EN 61010-1 CAT III 600V
DC Voltage: 400mV ±(0.8%+3), 4V/40V/400V ±(0.8%+3), 600V (1%+5)
AC Voltage: 400mV ±(1.2%+5); 4V/40V/400V ±(1.0%+8); 600V ±(1.2%+5)
Temperature: -40°C~1370°C; -40°F~2000°F (2.5%+4 depending on temp)
DC Current: 400μA/4000μA/40mA/400mA ±(1.2%+8); 4A/10A ±(1.2%+8)
AC Current: 400μA/4000μA/40mA/400mA ±(1.5%+8); 4A/10A ±(2.0%+10)
Resistance: 400Ω/4KΩ/40KΩ/400KΩ/4MΩ ±(1.5%+3); 40MΩ ±(1.5%+3)
Capacitance: 40nF±(8%+10); 400nF/4μF/40μF/400μF/40mF/100uF~2mF±(5%+5)
Frequency: 5/50/500/5K/50K/500K/5MHz ±(1%+3)
Package Contents:
1 x AstroAI 4000 Counts Digital Multimeter
1 x Test Leads (Pair)
1 x K-Type Thermocouple
1 x User Manual
As strictly an amateur, electricity ignorant DIYer, I found requests to company in California were answered promptly and sympathetically My questions were answered and legible operating instructions were sent.
My use of this instrument was for simple tests of power, voltage, strength, continuity.
Works well. I use it to test battery strength.
I apologize for not making an earlier review regarding Astro digital-multimeter. I received it promptly and on time and the DMM meter is n excellent choice that I made. Features are more than what I expected, compared to a 35 year old DMM Radio Shack meter that I paid $55.00 for at the time it was one of their best units. The new AstroAI TRMS-4000 unit is more than 5-Time's better and for a fraction of the cost compared to my old one. Once-again, I just wanted to say Thanks for the excellence and sophistication and a real bargain, Oh-yeah, the AstroAI was well package (Like it just came off of the assembly-line) and everything was right their in the box...
WILL S.
A great price for an awesome multimeter. In my opinoin, it was the best bang for the buck.
It’s fairly capable, especially for the price. I bought it to have a DMM on both floors. It’s comparable with my Fluke meter (If it Works it’s a Fluke 🤓) Nobody needing more precision would buy this, but it’s sufficient for all except industry, laboratory, and some benchtop repairs.
