Testers: Multifunction vs. Comfort Tools? Whether using high-end digital multimeters, sensible analog multimeters,
clamp-on meters or receptacle testers, professionals need testers that
are reliable and durable. Testers that meet the everyday challenges will
be in every gang box and pretenders will be cautionary tales. Manufacturers are developing testers that combine functionality from various specialty testers into multifunctional testers.