Fluke 16 True RMS HVAC Digital Multimeter with Built-In Thermometer The Fluke 16 Digital Multimeter is designed to function like a standard Multimeter and exclusive HVAC modes, unlike other models in the Fluke 10 series, the Fluke 116 comes with a built-in thermometer, allowing engineers to measure temperature and microamp mode for testing flame sensors to quickly troubleshoot problems for HVAC applications. The Fluke 116 measures resistance, continuity, frequency and capacitance. The Fluke 116 Multimeter are independently tested for safe use in CAT III 600 V Environments.