AstroAI
AstroAI Digital Clamp Meter Multimeter 4000 Counts Auto-ranging Amp Tester Measuring AC/DC Voltage & Current, Resistance, Capacitance, Frequency, Continuity, Live Wire Test, NCV Detection, Blue
Bottom line: The AstroAI Digital Clamp Meter Multimeter 4000 Counts Auto-ranging Amp ($32.19 on Amazon as of 2026-10-06): Auto-ranging 4000-count display, no manual range switching mid-measurement; main trade-off: jaw measures current only; clamping a conductor for voltage is not supported.
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*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
Pros & Cons
Pros
- ✓ Auto-ranging 4000-count display, no manual range switching mid-measurement
- ✓ Two-stage NCV alert: green light plus slow beep weak, red light plus short beep strong
- ✓ ZERO function cancels magnetic drift for tighter DC current readings
- ✓ Backlit LCD plus built-in flashlight for panel and under-bench work
- ✓ Rated CAT III 600V, pollution degree 2, with continuity buzzer and Data Hold
Cons
- ✗ Jaw measures current only; clamping a conductor for voltage is not supported
- ✗ Must clamp one conductor, not a whole power cord, or the reading cancels out
- ✗ 4000 counts limits resolution versus 6000-count meters at this price
- ✗ Accuracy depends on centering the conductor in the jaw head
Manufacturer description
The AstroAI Digital Clamp Meter is a 4000-count auto-ranging multimeter built for anyone tracing electrical faults without breaking a circuit. Clamp the jaw around a single conductor and it reads AC/DC current directly; switch modes and the same tool handles AC/DC voltage, resistance, capacitance, frequency, duty cycle, diode, and continuity checks. Non-contact voltage detection gives you a two-stage warning: a green light with a slow beep on a weak AC signal, a red light with a short beep on a strong one, so you know a wire is live before you touch it. Auto-ranging means no fumbling with…
SpecPicks Verdict
SpecPicks scored AstroAI Digital Clamp Meter Multimeter 4000 Counts Auto-ranging Amp… using a rating × review-volume × price-fit model applied to published specs and reviews across the tools & maintenance category. AstroAI's tools & maintenance lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for tools & maintenance: PC towers accumulate significant dust in 3–6 months, so cleaning frequency drives cordless vs. canned-air tradeoff decisions. Match the device's RPM or CFM rating to your case size, and confirm battery runtime covers a full tower cleaning before ordering. Prices and stock are set by the retailer and may have moved since this page was last updated.
Frequently Asked Questions
Can this clamp meter measure DC current, not just AC?
Yes. It measures both AC and DC current through the clamp jaw, plus AC and DC voltage through the probes. The ZERO function helps null out ambient magnetic interference before a DC current reading.
Why does it read zero when I clamp around an extension cord?
The clamp must go around a single conductor. Clamping a whole power cord puts the hot and neutral currents inside the jaw at once and they cancel, giving a near-zero reading. Separate out one wire and clamp that.
Is it safe for household breaker panel work?
It has passed overvoltage category III 600V and pollution degree 2 safety standards, which covers fixed household and branch circuit installations. Non-contact voltage detection lets you confirm a live wire before contact.
What can it test besides current and voltage?
Resistance, capacitance, frequency, duty cycle, diode, and continuity, with an audible continuity buzzer. It also does live wire testing and non-contact voltage detection with light and sound alarms.
Does it hold readings in tight spots where I cannot see the screen?
Yes. Data Hold freezes the current reading and Max/Min captures peaks, so you can pull the meter out to read it. The backlit LCD and flashlight also help in dark enclosures.
Key Features
- Versatile Digital Clamp Meter: Accurately measures AC/DC Current, AC/DC Voltage, Capacitance, Frequency, Duty Cycle, Resistance, Diode, Continuity and Live Wire Tests. This clamp meter is a really useful tool for solving industrial and household electrical issues.
- Non-contact Voltage Testing: This Clamp Meter features non-contact voltage testing with sound and light alarms. When the Meter senses a weak AC signal, the green indicator light will come on and the buzzer will emit a slow, audible beep. when the Meter senses a strong AC signal, the red indicator light will come on and the buzzer will emit a brief beep.
- Multifunctional & Easy to read: Support Data Hold, Max/Min, Auto power off after 15 minutes inactivity, low battery indicator and continuity buzzer. The LCD Backlit Screen and Flashlight make it easy to use in a dark working area. ZERO function decreases the data error influenced by the Earth’s magnetic field, and helps you to obtain a more accurate measurement.
- Large Jaw Opening: The jaw opening measures current in a conductor without touching or interrupting the circuit. Its slim and compact size makes it easy to operate in narrow spaces. This clamp meter has passed the environmental pollution test degree 2 and overvoltage category III 600V safety standards.
- Additional Tips: To measure the current you need to clamp the meter around one of the wires and not the whole power cord. Ensure the conductor to betested is in the center of the clamp head. The clamp Jaw is only used to measure current. Do not measure voltage by clamping the conductor being measured.
- Professional Technical Support Team - If you have any questions about the product, feel free to contact us! Our California-based support team will respond within 24 hours.
Full Specifications
| Brand | AstroAI |
|---|---|
| Color | Blue |
| Model | CM4K0R |
| Style | 4000 Counts |
| Style Name | 4000 Counts |
| Part Number | ASICM4K0R |
| Power Source | Battery Powered |
| Item Dimensions | 2.7 x 1.1 x 7.7 inches |
| Measurement Type | Multimeter |
| Specification Met | Beep |
| Included Components | 1 x Clamp Meter, 1 x Test Leads (Pair), 1 x user manual,1 x Storage Bag |
| Item dimensions L x W x H | 2.7 x 1.1 x 7.7 inches |
Ready to buy?
AstroAI Digital Clamp Meter Multimeter 4000 Counts Auto-ranging Amp Tester Measuring AC/DC Voltage & Current, Resistance, Capacitance, Frequency, Continuity, Live Wire Test, NCV Detection, Blue is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
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