Fluke

Fluke Corporation is an American electronic test and measurement equipment manufacturer founded in 1948 by John Fluke Sr. in Everett, Washington. Now a subsidiary of Fortive (spun out from Danaher in 2016), Fluke produces handheld digital multimeters, clamp meters, thermal imagers, insulation testers, oscilloscopes, and process calibration tools used by industrial maintenance, electrical contractors, HVAC technicians, and field service engineers.

In the multimeter category, Fluke is the reference brand against which competitors are bench-tested in independent reviews (EEVBlog, ElectroBOOM, hobbyist electronics forums). The product line carries UL Listed and CSA Certified CAT III and CAT IV ratings with verifiable certification — distinct from the budget import segment where CAT ratings are commonly self-declared without independent laboratory testing. Fluke meters are documented as designed with high-interrupting-capacity (HIC) fuses and metal-oxide varistor (MOV) input protection sufficient for the stated CAT category, consistently confirmed by independent teardowns.