Brand: Klein Tools Part Number #39558 SKU: CL390 Category: Testers
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Free Shipping $200+

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1Y Limited Warranty

  • Test lead holder on side of the clamp and optional magnetic hanger for the meter (Cat. Nos. 69445 or 69417) for hands-free operation
  • Non-contact voltage tester integrated into the clamp jaw
  • High-visibility reverse contrast LCD display for improved viewability in all ambient lighting conditions
  • Automatically ranging True Root Mean Squared (TRMS) measurement technology for accuracy
  • Measures AC/DC current and NCVT via a clamp and AC/DC voltage, resistance, frequency, DC microamps, capacitance, duty cycle, diode test, and continuity via test-leads, and temperature with a thermocouple
  • Measures temperature with a K-Type thermocouple probe
  • Max/Min, Rel/Zero, and Data Hold capability
  • Auto-power off after 10 minutes to conserve battery life
  • Includes a carrying case, test leads with CAT III/CAT IV safety caps, thermocouple, instructions, and 3 x AAA batteries
  • Low battery indicator and easily accessible battery compartment
  • Built to withstand a 6.6-foot (2 m) drop
  • CAT III 600V, Class 2, Double insulation safety rating
  • Meets requirements for use in basic and controlled electromagnetic environments like residential, office, and light-industrial locations


Klein Tools CL390 is an automatically ranging true root mean squared (TRMS) digital clamp meter. It measures AC/DC current and NCVT via the clamp, AC/DC voltage, DC microamps, resistance, continuity, frequency, capacitance, and diodes via test leads, and temperature via a thermocouple probe. It features a high visibility, reverse contrast LCD display that optimizes view ability both in dark or bright ambient lighting.

  • Read, understand and follow all instructions, cautions and warnings attached to and /or packed with all test and measurement devices before each use.
  • Do not attempt to measure resistance or continuity on live circuits.
  • Before each use verify meter operation by measuring a known voltage or current.
  • Do not use the meter during electrical storms or in wet weather, and do not use the meter or test leads if they appear to be damaged.
  • Usage of this meter in any way other than that specified by the manufacturer can impair safe operation, resulting in severe injury or death.
  • Type: AC/DC Current TRMS Clamp
  • Application: Measures both AC/DC current and NCVT via the clamp and AC/DC voltage, DC microamp current, resistance, continuity, frequency, duty-cycle, capacitance and tests diodes via the test leads, and temperature with a thermocouple
  • Special Features: Automatically Ranging True Root Mean Squared (TRMS) Measurement Technology for Accuracy; AC/DC Current Measurement; High Visibility Reverse Contrast LCD; NCVT
  • Material: ABS/Electronics
  • Batteries: 3 x AAA
  • Auto-Power Off: Yes
  • Jaw Size: 1.6” (4.1 cm)
  • Drop Protection: 6.6′ (2m)
  • Display: 4000 counts Reverse Contrast LCD
  • Functions: TRMS, AC/DC Current, NCVT, AC/DC Voltage, Resistance, DC microamp, Frequency, Capacitance, Continuity, Duty Cycle, Diode Test, and Temperature
  • Voltage: 600 V AC/DC
  • Frequency:10 Hz to 60 kHz for 8 V to 220 V AC RMS
  • Current:400 A AC/DC
  • Capacitance: 4000 µF
  • Ohms (Resistance):40 MΩ
  • AC Voltage:600 V
  • DC Voltage: 600 V
  • DC Polarity Indicator: Yes
  • DC Micro-Amp: 200 µA
  • Temperature Range: -40° – 1832°F (-40° – 1000°C)
  • Standard: CATIII 600V, Class 2, Double Insulation Safety Rating, CE Certified
  • Included: Carrying Case, Instructions, Test Leads, Thermocouple, and Batteries
  • Overall Length:8.45” (21.5 cm)
  • Overall Height: 1.51” (3.8 cm)
  • Overall Width: 3.51” (8.9 cm)
  • Weight: 11 oz (314 g)
  • UPC: 092644692871


Weight 1.00 lbs

Our products can be returned within 30 days of the original purchase of the product. A new product may be exchanged for another product or returned for a refund.
To be eligible for a return, please make sure that:
-The product was purchased in the last 30 days
-The product is in its original packaging
-The product is not used or damaged
-You have the receipt or proof of purchase
-You obtained a Return Merchandise Number (RMN) from us
Products that do not meet these criteria will not be considered for return.
Read Full Returns and Refunds Policy



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