The invention provides a non-contact voltage detector (“NCVD”) that includes a housing, a power switch, and an LED flashlight. The housing includes an upper portion and a lower portion which are slidably attachable to one another. A voltage sense circuit is positioned within the housing and illuminates a voltage sense indicator when it detects an AC voltage. The power switch is operable to activate the voltage sense circuit and the LED flashlight. The NCVD includes a first set of rails and a second set of rails for slidably attaching the NCVD to a test and measurement device, such as a digital multimeter (“DMM”) or an infrared (“IR”) temperature gun.