Continuity Testers | McMaster-Carr

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Batteries Required

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34 Products

Measuring and Inspecting

Line Break Detectors

Line Break Detectors

Check for continuity in circuits

Voltage Detectors

Voltage Detectors

Check for voltage in receptacles, cables, and other electrical components

Data Cable Testing Adapters

Data Cable Testing Adapters

Isolate the signals of a data line by connecting your testing device to an Ethernet wall outlet

Voltage Meters

Measure voltage in electrical components

Line Testers

Diagnose issues in telephone lines or Ethernet cables

Line Tester Adapters

Line Tester Adapters

Connect a testing device to a telephone line

Line Testing Amplifiers

Line Testing Amplifiers

Pair with line testers to identify cables without touching them

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)