Fluke T6-600 Electrical Tester 600 V AC/DC 200 A 17.8 mm fork

Open-fork electrical tester

The Fluke T6-600 is a handheld digital multimeter that uses FieldSense technology to measure AC voltage and current through an open fork without contacting live conductors. It accepts wires up to AWG 4/0 with a 17.8 mm jaw opening and includes a backlit display for clear readings in low light. The tester is rated for 600 V CAT III environments and comes with integrated test leads for additional measurement modes.

Sustained-load behaviour

FieldSense technology enables continuous AC voltage measurement up to 600 V and AC current measurement up to 200 A using only the open fork, eliminating the need to break circuits or strip insulation. The 17.8 mm fork maintains consistent coupling on conductors up to 120 mm² during extended monitoring sessions. True RMS sensing ensures accurate readings on non-linear loads throughout the measurement period.

Deciding specification

The 600 V AC/DC voltage range combined with 200 A current capability through the open fork determines whether this tester covers the circuits you work on daily. Buyers who need voltage measurement above 600 V or current measurement beyond 200 A cannot use this model for those tasks. The 17.8 mm jaw opening also limits use to conductors no larger than AWG 4/0.