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Fluke 381
Remote Display True-rms AC/DC Clamp Meter with 18-inch iFlex

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Product Information
Datasheet 177 KB PDF Datasheet
Manual 1.2 MB PDF Datasheet
381 Video Short Movie
381 Movie
PDF HelpPDF Help
  • 1000 A AC/DC current measurement with fixed jaw
  • 2500 A AC current measurement with iFlex flexible current probe
  • 1000 V ac and dc voltage measurement
  • True-RMS AC voltage and current for accurate measurements on non-linear signals
  • Frequency measurement to 500 Hz with both jaw and iFlex
  • 60 kΩ resistance measurement with continuity detection
  • Min, max, average and inrush recording to capture variations automatically
  • Wireless technology allows the display to be carried up to 30 ft away from the point of measurement for added flexibility without interference with measurement accuracy
  • iFlex flexible current probe expands the measurement range to 2500 A ac while providing increased display flexibility, ability to measure awkward sized conductors and improved wire access
  • CAT IV 600V, CAT III 1000 V safety rating
  • Integrated low pass filter and state of the art signal processing allows for use in noisy electrical environments while providing stable readings
  • Proprietary inrush measurement technology to filter out noise and capture motor starting current exactly as the circuit protection sees it
  • Ergonomic design fits in your hand and can be used while wearing personal protective equipment
  • Removable magnetic display
  • Radio transmitter automatically turns off when the display is connected to the meter
  • Large, easy to read, backlight display

The Fluke 381 True-rms Remote Display AC/DC Clamp Meter w/ 18"-inch iFlex does everything you would expect from a clamp meter, and then lets you remove the display for even more flexibility. Now one technician can do jobs that used to require two people; clamp the Fluke-381 AC/DC Clamp Meter around a conductor, remove the display and walk across the room to operate controls or remove protective equipment, all while watching real-time readings. The new iFlex flexible current probe (included with the Fluke 381 True-rms AC/DC Clamp Meter) expands the measurement range to 2500A AC while providing increased display flexibility, ability to measure awkward sized conductors and improved wire access.

Function Range Resolution Accuracy
AC Current via jaw 999.9A 0.1A 2% ± 5 digits
AC current via iFlex 2500A 0.1A 3% ± 5 digits
DC current 999.9A 0.1A 2% ± 5 digits
AC Voltage 1000V 0.1V 1.5% ± 5 digits
DC Voltage 1000V 0.1V 1% ± 5 digits
Resistance 60,000 Ω 0.1 Ω 1% ± 5 digits
Frequency 500 Hz 0.1 Hz 0.5% ± 5 digits
True-RMS Included
Continuity Included
Hold Included
Backlight Included
Min/Max/Avg Included
Inrush Included
Wire capacity 750 MCM or 2-500 MCM
Safety rating CAT III 1000 V, CAT IV 600 V
General Specifications
Diameter of measurable
1.3" or 34 mm max
Operating temperature -14 to 122°F (-10 to 50°C)
Storage Temperature -40 to 140°F (-40 to 60°C)
Operating Humidity < 90% @ 10 to 30 °C, < 75% @ 30 to 40°C
Operating Altitude 0 to 2000m
Temperature Coefficient 0.01% °C(<18°C or > 28°C)
Size 10.905 x 3.464 x 1.629 in (277 x 88 x 43 mm)
Weight 12 oz. (350g)
Ordering Information
Model Description Buy Online Price
MFR ID: 3610452
Fluke 381 True RMS 1000V AC/DC Remote Display Clamp Meter with 18-inch iFlex probe Buy Now Sale $494.99
(Reg. $549.99)
Included Accessories
  • 1 - Soft carrying case
  • 1 - 18-inch iFlex probe
  • 1 - Test Leads
  • 2 - AA Alkaline batteries
  • 1 - User Manual
Optional Accessories
Test Leads, Test Probes, and Clips
AC72 Fluke AC72 1000V Slide-on Alligator Clip Set, for TL71 and TL75 Discontinued
MFR ID: 1278079
Fluke AC87 Heavy Duty Bus Bar Clip Set, (one red, one black) Buy Now Sale $38.24
(Reg. $44.99)
MFR ID: 873448
Fluke AC89 Heavy Duty Insulation Piercing Test Clip Buy Now Sale $36.44
(Reg. $44.99)
MFR ID: 1610159
Fluke AC285 SureGrip Large Alligator Clips, (one red, one black) Buy Now Sale $20.24
(Reg. $24.99)
MFR ID: 2003633
Fluke TL223 Suregrip Electrical Test Lead Set, AC220, TP1, TL224 (Red/Black) Buy Now Sale $64.79
(Reg. $79.99)
MFR ID: 1610198
Fluke TL224 SureGrip Silicone Insulated Test Leads (Red/Black) Buy Now Sale $24.29
(Reg. $29.99)
MFR ID: 855705
Fluke TL75 1000V/10A CAT II Hardpoint Test Lead Set (Red/Black) Buy Now Sale $20.24
(Reg. $24.99)
MFR ID: 650887
Fluke TP-1 1000V/10A CAT II Slim Reach Test Probes (Red/Black) Buy Now Sale $16.19
(Reg. $19.99)
Cases & Holsters
MFR ID: 1664120
Fluke C33 Zippered Soft Carrying Case, Vinyl, Black/Yellow Buy Now Sale $28.34
(Reg. $34.99)
MFR ID: 1547919
Fluke C550 Rugged Canvas Tool Bag, 5 Pockets, Water Resistant Buy Now Sale $86.52
(Reg. $99.99)
MFR ID: 2091049
Fluke C1600 Hard Case Gear Box, for Meters and Accessories Buy Now Sale $61.95
(Reg. $69.99)
MFR ID: 1608458
Fluke H3 Clamp Meter Holster with Pocket for Lead Storage, Black/Yellow Buy Now Sale $30.09
(Reg. $34.99)
Current Clamps
MFR ID: 3676410
Fluke I2500-10 2500A 10 inch iFlex Flexible Current Probe Buy Now Sale $131.99
(Reg. $149.99)
MFR ID: 3676405
Fluke I2500-18 2500A 18 inch iFlex Flexible Current Probe Buy Now Sale $128.29
(Reg. $149.99)
MFR ID: 2098595
Fluke L206 Deluxe LED Hat Light with 3 Bright White LEDs Buy Now Sale $39.49
(Reg. $49.99)
MFR ID: 2139415
Fluke LVD1 Non-contact AC Voltage LED Light Discontinued
See: LVD1A
MFR ID: 2740300
Fluke LVD2 Pen Style Non-Contact AC Voltage Detector with White LED Flashlight Buy Now Sale $35.19
(Reg. $39.99)