Clamp meters and multimeters / Compared

Fluke 376 FCvsKlein Tools CL900

Two clamp meters, compared from their makers' published US specs. Specs checked 2026-10-17. Makers do not always rate the same way, so treat cross-brand figures with care.

Fluke 376 FC

CLAMP METER

CAT III 1,000 V, CAT IV 600 V999.9 A999.9 A

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Find 376 FC prices on Amazon Find 376 FC prices at Acme Tools Opens the retailer in a new tab; the current price is shown there. Marketplace sellers vary: check the seller and exact model.

Klein Tools CL900

CLAMP METER

CAT IV 600 V, CAT III 1,000 V2,000 A2,000 A

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Find CL900 prices on Amazon Find CL900 prices at Acme Tools Opens the retailer in a new tab; the current price is shown there. Marketplace sellers vary: check the seller and exact model.

How to choose between them

Working at the service entrance or on utility feeds needs a CAT IV rating; panels and feeders CAT III. The 376 FC is rated CAT III 1,000 V, CAT IV 600 V; the CL900 CAT IV 600 V, CAT III 1,000 V. The lower of the meter's and the leads' ratings applies.
Clamping large conductors or bundles? Jaw openings as published: 376 FC 34 mm, CL900 2 in.
Cells: the 376 FC uses 2 AA; the CL900 2 x AAA.
In the box: the 376 FC comes with 18-inch or 36-inch iFlex Flexible Current Probe, TPAK magnetic hanging strap, TL75 Test Leads; the CL900 with Instruction Manual, Straight Input Test Leads, Batteries.

From the published figures only; no testing. Rated figures from different makers are not measured the same way.

Where they differ

Safety rating: the 376 FC is CAT III 1,000 V, CAT IV 600 V; the CL900 is CAT IV 600 V, CAT III 1,000 V.
Klein Tools CL900: higher AC current range (2,000 A vs 999.9 A).
Klein Tools CL900: higher DC current range (2,000 A vs 999.9 A).

17 of 19 listed specs differ or are listed by only one maker. Stated from the published figures only; no testing.

Every published spec, side by side

Spec	Fluke 376 FC	Klein Tools CL900
Safety rating (IEC 61010 CAT)Differs	CAT III 1,000 V, CAT IV 600 V	CAT IV 600 V, CAT III 1,000 V
AC current, max rangeDiffers	999.9 A	2,000 A
DC current, max rangeDiffers	999.9 A	2,000 A
AC voltage, max range	1,000 V	1,000 V
DC voltage, max range	1,000 V	1,000 V
True-RMSOnly one listed	Not on maker page	Yes
Jaw openingDiffers	34 mm	2 in
Display resolutionOnly one listed	Not on maker page	6,000 counts
Batteries (cells)Differs	2 AA	2 x AAA
Resistance, max rangeOnly one listed	60 kΩ	Not on maker page
Capacitance, max rangeDiffers	1,000 μF	6,000 μF
Frequency, max rangeDiffers	500 Hz	500 kHz
Ingress protectionDiffers	IP30	IP40
SizeDiffers	249 x 85 x 45 mm	10.39 x 3.9 x 1.7 in (L x W x H)
WeightOnly one listed	395 g	Not on maker page
Low-impedance (LoZ) modeOnly one listed	Not on maker page	Yes
Non-contact voltage detectionOnly one listed	Not on maker page	Yes
Min/Max recordingOnly one listed	Not on maker page	Yes
Drop protectionOnly one listed	Not on maker page	6.6 ft (2 m)

"Differs" marks different published values; pure formatting is not counted. "Only one listed" marks a spec only one maker page gives. Box contents, owner ratings, manuals and sources are on each model's own page: 376 FC, CL900. Swap either model in the compare tool.

Fluke 376 FC

CLAMP METER

CAT III 1,000 V, CAT IV 600 V999.9 A999.9 A

Paid link: we may earn a commission.

Find 376 FC prices on Amazon Find 376 FC prices at Acme Tools Opens the retailer in a new tab; the current price is shown there. Marketplace sellers vary: check the seller and exact model.

Klein Tools CL900

CLAMP METER

CAT IV 600 V, CAT III 1,000 V2,000 A2,000 A

Paid link: we may earn a commission.

Find CL900 prices on Amazon Find CL900 prices at Acme Tools Opens the retailer in a new tab; the current price is shown there. Marketplace sellers vary: check the seller and exact model.

Sources

Fluke US product page 376 FC, retrieved 2026-10-17
Klein Tools US product page CL900, retrieved 2026-10-17

Researched by Rob, licensed electrician (Australia). Found an error? Tell us.

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