Best Current Clamp: Six Picks for AC, DC and Leakage
As an Amazon Associate we earn from qualifying purchases. Details
A current clamp measures current by closing its jaw around one conductor, so you do not have to break the circuit. This guide compares six clamp-type meters from the listing data, grouped by what they measure: general AC and DC current, and low-level leakage. The figures that matter most are the range, the resolution, the jaw size and the AC or DC capability, and the listings state these in different ways. Listing figures were checked on 11 October 2026.
Quick answer: for everyday AC current, the Neoteck and AstroAI are the general-purpose clamp multimeters. For leakage in the milliamp and microamp range, the EITAI and ETCR listings state a 10 uA resolution, and the VIVANTECH listing states 1 mA. The Fluke i400s is the only 400 A AC clamp in this set.
The six clamps at a glance
| Clamp | Listed current range | Resolution (as listed) | Best fit |
|---|---|---|---|
| AstroAI Digital Clamp Meter (B08MTTX66X) | AC current; not DC current (bullet) | Not stated | General multimeter with clamp |
| Neoteck Clamp Meter (B0FL76KQ1X) | AC current up to 600 A | Not stated | AC with a 1 A low-current mode |
| VIVANTECH Low Current Clamp (B0FRMKT79S) | AC and DC, 1 mA to 60 A | 1 mA | Automotive low-current checks |
| EITAI6540 Leakage Clamp (B0DWT49KDB) | 0.00 mA to 300 A | 10 uA | Leakage with 99-group memory |
| ETCR6540 Mini Leakage Clamp (B0FCF1DKK1) | 0.00 mA to 300.0 A | 10 uA | Compact leakage meter |
| Fluke i400s AC Current Clamp (B000LE3KJI) | 400 A AC (name) | Not stated | High-current AC with BNC output |
How we chose these six
We kept clamp-type meters whose listing states a current range and a use. No Pico current clamp appears among the listings, so the set covers the general clamp type. We did not test any clamp, and nothing below reports personal use.
- Range and type: the AC or DC capability and the highest current the listing gives.
- Resolution: the smallest step the listing states.
- Jaw and size: the jaw opening and the meter size, where the listing gives them.
1. AstroAI Digital Clamp Meter (B08MTTX66X)
The AstroAI is a 2000-count clamp multimeter with AC and DC voltage, AC current, resistance, capacitance, continuity and a live wire test. Its listing says it cannot test DC current, and gives the dimensions as 195 x 68 x 29 mm and a weight of about 203 g. It is rated CAT III 600 V with pollution level 2. The bullets and specs name the model as CM2K0R, which the title does not show, so confirm the model on the product page. Check the AstroAI clamp meter on Amazon.
2. Neoteck Clamp Meter (B0FL76KQ1X)
The Neoteck is a 4000-count TRMS clamp meter listed to 600 A AC current and 600 V AC or DC voltage. The listing describes a 1 A low-current mode and says it carries a CAT III 600 V rating. It states a voltage accuracy of plus or minus 1.0 percent and an LED alarm for AC voltage between 90 V and 1000 V. Its bullets also include a set of measurement tips, such as keeping the wire centred in the jaw. Check the Neoteck clamp meter on Amazon.
3. VIVANTECH Low Current Clamp Meter (B0FRMKT79S)
The VIVANTECH measures AC and DC current from 1 mA up to 60 A, with a 1 mA resolution. Its jaw is listed at 16 mm by 18 mm, and the listing describes automatic AC or DC recognition with a manual override. It has a data hold, a backlight and 99-group memory recall. The listing ties it to automotive electrical diagnosis. Check the VIVANTECH clamp on Amazon.
4. EITAI6540 Leakage Clamp Meter (B0DWT49KDB)
The EITAI is a leakage clamp listed from 0.00 mA to 300 A, with a 10 uA resolution. Its accuracy is stated as plus or minus 1.5 percent of reading plus 5 digits from 0 to 60 A, and plus or minus 2 percent of reading plus 5 digits from 60 A to 300 A. The jaw is 40 mm, or 1.6 inches. The meter is listed at 180 mm by 72 mm by 32 mm and 200 g without accessories, or 310 g with them. It has 99-group memory and a line-voltage rating below DC 600 V. Its batteries are not included, according to the listing. Check the EITAI leakage clamp on Amazon.
5. ETCR6540 Mini Leakage Clamp (B0FCF1DKK1)
The ETCR is a compact leakage clamp with the same listed range as the EITAI, 0.00 mA to 300.0 A, and the same 10 uA resolution. Its accuracy is stated as plus or minus 1.5 percent plus 5 digits. Its CT jaw is 35 mm by 40 mm, and the meter weighs 0.31 kg with accessories. The listing describes a magnetic shielding design, peak hold, data hold and 99-group memory, and it runs on two LR03 batteries. Check the ETCR clamp on Amazon.
6. Fluke i400s 400 Amp AC Current Clamp (B000LE3KJI)
The Fluke i400s is named as a 400 A AC current clamp with a BNC connector. Its listing is short: it gives the measurement type as ammeter and the power source as hand powered, a field the listing does not explain. The bullets are general statements about the brand, so no resolution or accuracy is stated in the listing data. Check the Fluke i400s on Amazon.
What plus or minus 1.5 percent means at 10 A
For example, take a 10 A reading on the EITAI. A reading of plus or minus 1.5 percent of reading is 0.15 A either side, so the true value could sit between 9.85 A and 10.15 A before the 5-digit term is added. The ETCR listing gives the same figure, so the two leakage clamps match on this point. Now take a 25 mA leakage reading. The EITAI and ETCR resolve it in 10 uA, which is 0.01 mA steps. The VIVANTECH resolves in 1 mA steps, so it can show 25 mA but not a value between 25 mA and 26 mA. For a 60 amps reading, both the Neoteck’s 600 amps top range and the ETCR’s 300 amps top range sit well above it, and a 10 amps load would use only a small part of either.
What the listings do not say
Most of the listings do not state a resolution or an accuracy for the current range, so the comparison is only as good as the figures given. The Fluke listing states no range beyond its name, and the AstroAI listing does not state a DC current range at all.
Frequently asked questions
Which clamp reads DC current?
The VIVANTECH listing states AC and DC current from 1 mA to 60 A. The AstroAI listing says it cannot test DC current, and the other listings give AC or leakage figures.
What is a leakage clamp used for?
The EITAI and ETCR listings describe leakage measurement from 0.00 mA to 300 A with a 10 uA resolution. A low leakage reading needs that finer step, which the VIVANTECH’s 1 mA resolution does not give.
Do I need to clamp just one wire?
Yes. The AstroAI listing says to clamp one conductor and not the whole cord, with the wire centred in the jaw. The Neoteck tips make the same point about clamping live and neutral together.
Which clamp has the highest AC current rating?
The Neoteck is listed to 600 A AC, the highest in this set. The Fluke i400s is listed at 400 A AC by its name, and the EITAI and ETCR leakage clamps go to 300 A.
How current are these listing figures?
The listings were checked on 11 October 2026, and figures are shown as the sellers state them. Confirm the range and model on the product page before you buy.
Conclusion
For general AC current, the Neoteck is the widest listed range and the AstroAI is the general-purpose multimeter with a clamp. For low leakage, the EITAI and ETCR both state 10 uA resolution, and they are the closest match. The VIVANTECH suits DC current checks at 1 mA resolution, and the Fluke i400s is the high-current option. Match the range and resolution to your reading, and confirm the figures on each product page.
For more on clamp meters, see best true RMS digital clamp meter, best AC DC current clamp meter, and best clamp tester Fluke. For low-current and DC readings, see best DC current amp meter and best handheld clamp.
AstroAI clamp on Amazon · Neoteck clamp on Amazon · VIVANTECH clamp on Amazon · EITAI leakage clamp on Amazon · ETCR mini clamp on Amazon · Fluke i400s on Amazon
