21550T Series

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21550T Series

Southwire AC/DC True RMS Clamp Meter 21550T Series

Southwire AC/DC True RMS Clamp Meter


Southwire’s 21550T 400A AC/DC clamp meter with True RMS offers the features needed for the professional electrician, including True RMS accuracy, the ability to measure both AC and DC current, and a built-in, non-contact, AC voltage detector. Other features included are REL and max/min functions in addition to standard multimeter functions such as resistance, capacitance, continuity, temperature, and diode. This clamp meter also has a third-hand test probe holder and a bright LED work light. The 21550T is built to last and is guaranteed to survive a six-foot drop. 



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QtyModelDescriptionIn StockList PriceInternet Price
21550T CLAMP METER, 400A AC/DC 21050TIn Stock360.00201.60


No accessories found
  • 400A AC/DC current range 
  • CAT III 600V safety rating 
  • True RMS accuracy 
  • Built-in, non-contact voltage tester 
  • Third-hand test probe holder 

Clamp jaw opening: 1.2"" (30.5mm)

Insulation: Class 2, Double insulation

Display: 4000 count backlit LCD

Polarity: Minus symbol ""-"" is displayed for negative polarity

Over Range Indication: "OL"" is displayed

Diode Test: Test current approx.1mA, open circuit voltage approx. 3

Continuity Test: Audible beeper sounds if resistance is approx. son or

Low Battery Indication: Low battery picture is displayed

Measurement Rate: 3 times per second, nominal

Auto Power Off: After approx. 15 minutes of inactivity

Input Impedance: AC/DC voltage: +/-1OM Omhs

AC Response: Average Responding

AC Bandwidth: AC voltage: 50 to 400Hz, AC current: 50 to 400Hz

Battery: Three AAA batteries

Operating Temperature: 32° to 104°F (0°C to 40°C)

Storage Temperature: 14° to 122°F (-10°C to 50°C)

Relative Humidity: Maximum, non-condensing: 95% up to 82°F (28°C) 75% to 104°F (40°C), 45% to 122°F (50°C)

Operating Altitude (Maximum): 0-2000 meters

Weight: 269  (including three AAA batteries)

Dimensions: 8.5" x 2.9" x 1.6" (216 x 74 x 41mm)

Safety: UL: 61010 - 1:2012, 61010-2-032: 2014, 61010-2-03 2014 EMC: EN61326-1:2013,  EN61326-2-2:2013


Download Additional Data

document   21550T Operations Manual