ACTAS BTT is a battery-operated, hand-held measuring device that can determine operating times, contact synchronicity, sequence time, and coil currents extremely quickly and easily. Thanks to this extensive functionality and its high measurement accuracy, ACTAS BTT can be put to a wide range of different uses when measuring the operating times of low, medium, and high voltage switchgear devices, relay contacts, contactors, and switch disconnectors, to mention a few applications.