









Klein Tools CL320 HVAC Digital Clamp Meter 400A AC TRMS NCVT Temp
- 30 days from delivery, on unused items in their original packaging.
- Wrong, damaged or defective item? We send a prepaid label and make it right.
- Changed your mind? You cover the return shipping; refund to your original payment.
- New, genuine, in original packaging
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Key specs
Full details ↓- Measures AC current and non-contact voltage (NCVT) via clamp; AC/DC voltage, resistance,…
- Measures temperature with K-type thermocouple
- NCVT sensor built into clamp jaw
- Backlit LCD for low-light viewing
Key specs
Full details ↓- Measures AC current and non-contact voltage (NCVT) via clamp; AC/DC voltage, resistance,…
- Measures temperature with K-type thermocouple
- NCVT sensor built into clamp jaw
- Backlit LCD for low-light viewing
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The details that matter.
- Brand
- Klein Tools
- Model
- CL320
- Condition
- New, genuine, in original packaging
- Free US shippingShips from Pompano Beach, FL
- Same-day dispatchOrder by 2:30 PM ET, Mon–Fri
- 30-day returnsSee return policy
Pickup currently unavailable
The Klein Tools CL320 HVAC Digital Clamp Meter, AC Auto-Ranging 400 Amp is an auto-ranging clamp meter built for HVAC technicians. It measures up to 400A AC with true RMS accuracy and adds the functions HVAC work calls for, including DC microamps for flame sensor testing, temperature, frequency, and non-contact voltage detection.
Key Features
- Measures AC current and non-contact voltage (NCVT) via clamp; AC/DC voltage, resistance, frequency, DC microamps, capacitance, duty cycle, diode test and continuity via test leads
- Measures temperature with K-type thermocouple
- NCVT sensor built into clamp jaw
- Backlit LCD for low-light viewing
- Auto-ranging True RMS measurement
- Side test-lead holder; optional magnetic hangers (69445 or 69417) for hands-free use
- Auto-range, data hold and max/min
- Auto power-off after 10 minutes
- Low-battery indicator and easy-access battery compartment
- Drop-tested to 6.6 ft (2 m)
- CAT III 600V, Class 2, double-insulated safety rating
Specifications
- Type: HVAC TRMS Clamp Meter
- Display: 4000-count backlit LCD
- Auto Ranging: Yes
- TRMS: Yes
- AC Current: 400 A
- AC Voltage: 600V
- DC Voltage: 600V
- Resistance: 40 MOhm
- Capacitance: 4000 uF
- Frequency: 10 Hz to 60 kHz
- DC Microamp: 200 uA
- Temperature Range: -40 to 1832 F (-40 to 1000 C)
- Jaw Size: 1.6 in (4.1 cm)
- Batteries: 3 x AAA
- Drop Protection: 6.6 ft (2 m)
- Standard: CAT III 600V, Class 2, double-insulated, CE
- Material: ABS/electronics
- Overall Length: 8.45 in (21.5 cm)
What's Included
- Digital clamp meter
- Test leads with CAT III/CAT IV safety caps
- Thermocouple
- 3 x AAA batteries
- Carrying case
- Instructions
Check out our store for compatible Klein Tools parts, accessories, and companion tools.
Thank you for choosing Significant Services. We sincerely appreciate your business and are proud to be your source for high-quality tools and equipment.
Significant Services Inc. is an independent retailer, not the manufacturer. All products are new unless otherwise specified. Brand names and trademarks belong to their respective owners, and unless stated otherwise we are not affiliated with or endorsed by the manufacturer.
Ships the same day
Order by 2:30 PM ET, Monday–Friday, and it leaves our Pompano Beach, FL warehouse the same business day.
Free US shipping
Every order, no minimum, with Free Economy Shipping. Need it sooner? Choose 2-Day Air at checkout. Most orders arrive in 1–5 business days.
30-day returns
Not right for the job? Return it within 30 days of delivery. Read our refund policy.
Significant Services Inc.
1580 NW 27th Ave, Ste 12, Pompano Beach, FL 33069
Support: Monday–Friday, 9:00 AM–5:00 PM ET · 954-932-6568 · support@significantservices.com
Significant Services is an independent retailer. Brand names and trademarks belong to their respective owners, and unless stated otherwise we are not affiliated with or endorsed by the manufacturers whose products we sell.

