Fluke 179 IMSK combines the Fluke 179 True-RMS multimeter with the Fluke 323 True-RMS clamp meter for industrial electrical service. The multimeter measures voltage, current, resistance, capacitance, frequency and temperature. The clamp measures AC current up to 400 A without opening the conductor. The package includes the 80BK-A temperature probe, TL75 test leads and AC175 clips. The two instruments support complementary checks on control panels and electrical circuits. Their voltage limits and measurement categories differ; observe the individual ratings of each instrument and connected accessory.