The next generation VoltALERT AC non-contact voltage testers from Fluke are easy to use – simply touch the tip to a terminal strip, outlet or supply cord. The Fluke 1ACII VoltALERT senses the steady state electrostatic field produced by ac voltage through insulation without requiring contact to the bare conductor. A red glow at the tip and a beeping noise (if not switched OFF) indicates the presence of voltage. Electricians, maintenance, service, safety personnel and homeowners can quickly test for energised circuits in the workplace or at home.