Home » CL390 Klein Tools AC/DC Digital Clamp Meter, auto-ranging, 400 A
CL390 Klein Tools AC/DC Digital Clamp Meter, auto-ranging, 400 A
CL390 Klein Tools AC/DC Digital Clamp Meter, auto-ranging, 400 A
CL390 Klein Tools AC/DC Digital Clamp Meter, auto-ranging, 400 A
CL390 Klein Tools AC/DC Digital Clamp Meter, auto-ranging, 400 A
CL390 Klein Tools AC/DC Digital Clamp Meter, auto-ranging, 400 A
CL390 Klein Tools AC/DC Digital Clamp Meter, auto-ranging, 400 A
CL390 Klein Tools AC/DC Digital Clamp Meter, auto-ranging, 400 A
CL390 Klein Tools AC/DC Digital Clamp Meter, auto-ranging, 400 A
CL390 Klein Tools AC/DC Digital Clamp Meter, auto-ranging, 400 A
CL390 Klein Tools AC/DC Digital Clamp Meter, auto-ranging, 400 A
CL390 Klein Tools AC/DC Digital Clamp Meter, auto-ranging, 400 A
CL390 Klein Tools AC/DC Digital Clamp Meter, auto-ranging, 400 A
CL390 Klein Tools AC/DC Digital Clamp Meter, auto-ranging, 400 A
CL390 Klein Tools AC/DC Digital Clamp Meter, auto-ranging, 400 A
CL390 Klein Tools AC/DC Digital Clamp Meter, auto-ranging, 400 A
CL390 Klein Tools AC/DC Digital Clamp Meter, auto-ranging, 400 A
Klein Tools SKU: CL390 Barcode: 092644692871
Klein Tools

CL390 Klein Tools AC/DC Digital Clamp Meter, auto-ranging, 400 A

In stock - 5 items available
SKU: CL390 UPC: 092644692871
(3)
$119.00 CAD
-48% $230.00 CAD $119.00 CAD

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Weight: 4.0 lb

The Klein Tools CL390 is a TRMS auto-ranging clamp meter that adds DC current, frequency, capacitance, and duty cycle to the AC measurements most clamp meters stop at, with a non-contact voltage tester built into the clamp jaw.

  • Measures: AC/DC current and NCVT (clamp); AC/DC voltage, resistance, frequency, DC microamps, capacitance, duty cycle, diode test, and continuity (test leads); temperature (K-type thermocouple)
  • Display: high-visibility reverse-contrast LCD for all ambient lighting
  • Safety rating: CAT III 600V, Class 2, double insulation
  • Includes: carrying case, test leads with CAT III/CAT IV safety caps, thermocouple, batteries
  • Drop tested to 6.6 feet (2 m)

Best for: technicians who need DC current and frequency readings in addition to standard AC clamp measurements, with Max/Min and Rel/Zero to track a reading over time.
Free standard shipping to ON/QC on eligible orders of $150 or more after discounts; product restrictions apply. Eligible accounts: 10% off $99+ before shipping and tax. Sign in and confirm eligibility; guest checkout remains available. Terms apply.
CSA-approved products from a Canadian-owned supplier, 15+ years in Ontario.
Counter pickup in Vaughan, Monday to Friday, 8am to 4pm. Call the counter for advice.
30-day returns on most items. Bulbs, cut-to-length wire and hazardous goods are excluded.

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Feature CL390 Klein Tools AC/DC Digital Clamp Meter, auto-ranging, 400 A
CL390 Klein Tools AC/DC Digital Clamp Meter, auto-ranging, 400 A
$119.00
Current
Brand Klein Tools
Type
Availability In stock
Rating 5.0 / 5

Pick up at our Vaughan counter

Our counter is at 8520 Jane St, Unit 5, Vaughan, ON L4K 5A9, open Monday to Friday, 8am to 4pm. Order online and collect, or bring a material list and we will price it at the counter. Contractors and DIY customers are both welcome.

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  • 5 stars: 3 (100%)
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  • 1 star: 0 (0%)
J
John, North York (Canada)
My wife is jealous of a piece of plastic.

I've had this clamp meter for a week, and I think my wife is starting to get suspicious.

Yesterday, I caught her glaring at it from across the garage. "You're spending an awful lot of time with that... thing," she said.

Can I help it if it just gets me?

This morning, I used it to figure out why half the kitchen outlets were dead. This meter didn't judge my questionable wiring from 2005. It just clamped on, gave me the numbers, and the NCV function politely beeped to let me know I was about to give myself a spicy new haircut.

It's got more features than my car. The carrying case is nicer than my luggage. My old meter just feels so... analog now. I think I'll have to let it down gently.

10/10. Might buy it a tiny hat.

John, North York review photo
G
Gilles Comtois (Canada)
Very good quality

Very good quality ...

J
Jommy (Canada)
Top of the Kline

Great product from Kline Tools.

Key specs

Current
400A AC/DC
Ranging
Auto-ranging
Type
Digital clamp meter

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Maple Electric Supply is a distributor. For wiring, installation, and code, work with a licensed electrician and the Canadian Electrical Code (CEC).

About this product
The Klein Tools CL390 is an auto-ranging digital clamp meter that clamps both AC and DC current up to 400A — the one to reach for where an AC-only clamp stops short. For the full function list and ratings, see the manufacturer's spec sheet. Stocked in Canada by Maple Electric — CAD pricing, ships Canada-wide, will-call pickup in Vaughan.
Common questions
What's the difference between the CL390 and the CL220?
The CL390 clamps both AC and DC current up to 400A; the CL220 clamps AC current only. Both are auto-ranging Klein clamp meters.
What is the CAT safety rating?
The listing doesn't state it — check the Klein spec sheet before panel work, and confirm the category your task requires with a licensed electrician.
Does it measure voltage too?
This listing covers the 400A AC/DC clamp function. For the full function list and measurement ranges, confirm against Klein's spec sheet for the CL390.