The Triplett Hall-effect clamp meter has been my DC current tool for five months. I bought it at retail for solar string inspection work, EV charging diagnostics, and the occasional battery bank troubleshooting where a current transformer simply cannot read DC. Triplett did not provide a sample. The Hall-effect design is the headline feature, and at $160 it offers DC current capability that most clamp meters at this price simply cannot provide.
Why you should trust this review
I have been working in residential and light commercial electrical for over a decade and have used clamp meters from Fluke, Klein, Amprobe, and Triplett across that span. This Triplett unit was purchased at retail. I tracked specific things across five months, including DC current accuracy against a calibrated reference, AC True-RMS performance on VFD output, jaw opening fit on real conductors, and battery life across heavy use.
How we tested the Triplett clamp
- Verified DC current accuracy at 5A, 20A, 100A, and 250A using a calibrated DC source and reference shunt.
- Tested AC current True-RMS reading on a VFD-driven motor and compared to a Fluke 376 reference.
- Measured AC voltage at 120V and 240V against a calibrated source.
- Performed continuity tests on 50 connections.
- Logged battery life across five months of intermittent use.
Full protocol on our methodology page.
Who should buy the Triplett Hall-effect clamp?
Buy it if:
- You are an electrician, solar installer, or HVAC tech who occasionally needs DC current measurement.
- You work on EV charging stations, battery banks, or solar arrays where DC matters.
- You want True-RMS accuracy on VFD-driven motor output.
Skip it if:
- You only measure AC current. The Klein CL800 with in-rush is a better choice at the same price.
- You need in-rush current capture for motor starting analysis. Step up to the Fluke 376.
- You need 1000A or higher capacity. The 600A ceiling is plenty for residential and light commercial.
DC current accuracy: where Hall-effect earns the price
Across DC current verification at 5A, 20A, 100A, and 250A using a calibrated DC source, the Triplett read within 3 percent at every load. That is at the upper end of the spec but consistent with its price class. Most $35 generic clamps that claim DC current measurement actually use a CT and read only AC, with the DC mode either inoperative or wildly inaccurate. The Triplett’s Hall sensor is the real article.
True-RMS on AC
On a VFD-driven motor, the Triplett True-RMS reading was within 4 percent of a Fluke 376 reference. On clean sinusoidal AC the reading was within 2 percent. That is in line with peers at this price.
Jaw opening and ergonomics
The 1.2-inch jaw opening accommodates most residential and small commercial conductors up to about 350 MCM. For larger conductors, a 2-inch jaw is required, and the Triplett does not offer that. The jaw action is firm and the trigger has a positive spring return. After five months in a tool bag, the jaw still aligns cleanly when closed.
Display and feature set
The 6000-count backlit LCD is clear at arm’s length. The bargraph at the bottom helps with fluctuating loads. Display refresh is slower than premium clamp meters, which means brief current spikes are missed by the digit display but caught by the bargraph. Standard features (voltage, resistance, capacitance, continuity) work as expected. The unit lacks frequency above 400 Hz and lacks in-rush current capture.
Build quality and safety
CAT III 600V is the safety rating, which is one step below the Fluke and Klein peers at CAT IV 600V. For residential and light commercial work CAT III is sufficient. The housing is plastic with rubber overmolds and has held up to five months of bag use without functional damage.
Battery and runtime
Running on a 9V battery, the Triplett lasts roughly 100 hours of continuous use. Auto-power-off after 15 minutes preserves battery during pauses. Battery replacement is straightforward through a screwed cover.
What it does not do
It does not capture in-rush current. It does not read frequency above 400 Hz. It does not have wireless connectivity. It is not CAT IV rated. And the Triplett service network is smaller than Fluke or Klein, which matters if you need calibration or warranty service.
Where the Triplett fits
The Triplett Hall-effect clamp meter is the right tool for electricians and solar installers who need entry-level DC current measurement at a working price. It is not the unit for premium industrial use, and it lacks features that premium clamp meters offer. Within its scope, it does the work and earns its place in a tool bag.
Triplett Hall-Effect 600A True-RMS Clamp Meter vs. the competition
| Product | Our rating | DCCurrent | Inrush | Safety | Price | Verdict |
|---|---|---|---|---|---|---|
| Triplett Hall-Effect Clamp | ★★★★☆ 4.3 | Yes 600A | No | CAT III 600V | $160 | Top Pick |
| Fluke 376 FC | ★★★★★ 4.7 | Yes 1000A | Yes | CAT IV 600V | $580 | Editor's Choice |
| Klein CL800 | ★★★★★ 4.5 | No | Yes | CAT IV 600V | $200 | Recommended |
| Generic 600A clamp meter | ★★★☆☆ 2.9 | Claimed | No | CAT II | $35 | Skip |
Full specifications
| Current ranges | AC and DC up to 600 A |
| Sensor type | Hall-effect |
| True-RMS | Yes, AC current and voltage |
| Voltage ranges | AC and DC up to 600 V |
| Resistance | Up to 60 Mohm |
| Capacitance | Up to 1000 uF |
| Jaw opening | 1.2 in (30 mm) |
| Safety rating | CAT III 600V |
| Battery | 9V, approx. 100 hours |
| Display | 6000 count backlit LCD |
Should you buy the Triplett Hall-Effect 600A True-RMS Clamp Meter?
The Triplett Hall-effect clamp meter is the unit I recommend to electricians who need DC current measurement without paying Fluke 376 prices. The Hall-effect sensor reads both AC and DC current to 600A, the True-RMS spec is honest on non-sinusoidal waveforms, and the build is more robust than the price suggests. It lacks the in-rush current capture and frequency capability of premium units, but for HVAC, solar, and battery work where DC current matters, it does the job.
Frequently asked questions
Is the Triplett Hall-effect clamp meter worth $160 in 2026?+
Yes for electricians who need DC current measurement. Most clamp meters at this price use current transformers that read AC only. The Hall-effect design opens up battery work, solar arrays, and HVAC blower motor diagnostics.
Triplett vs Fluke 376 FC: which is better?+
The Fluke is the more refined unit with in-rush capture, longer probe leads, and the FC wireless feature. It is also nearly four times the price. For occasional DC current work the Triplett is a smart entry point.
Why does Hall-effect matter for DC current?+
Current transformers used in most cheap clamp meters work only on AC because they require a changing magnetic field. Hall-effect sensors detect the static magnetic field around a DC conductor, which is what makes DC current measurement possible without breaking the circuit.
Should I upgrade from a current-transformer clamp to this Hall-effect unit?+
Only if your work involves DC. Solar installations, EV charging, battery banks, and HVAC blower motor diagnostics all benefit. For pure AC work the cheaper Klein or Fluke CT clamps are fine.
📅 Update log
- May 9, 2026Refreshed pricing and added DC current accuracy notes.
- Sep 28, 2025Initial review published.
