The model numbers Fluke 73 and 77 are an important part of Fluke’s reputation. In many years of service they have become the preferred models for a large number of professionals. The Fluke 73 and 77 offer exactly the right fit for a wide range of measurements. They are truly all-round performers. The 73 III is perfectly suited for many electronic applications and has the "classic" 70 series design with removable holster. The 77 III has all the features and functions for a wide range of industrial applications packaged in an ergonomic case with integrated holster. Both models come with the unique lifetime warranty.

73-III: All inputs are protected to EN61010-1 CAT II 600V 77-III: All inputs are protected to EN61010-1 CAT III 600V / CAT II 1000V UL, CSA, TÜV listed

Environmental Specifications
Operating Temperature	0°C to +50°C
Storage Temperature	-40°C to +60°C
Humidity (Without Condensation)	0% - 90% (0°C - 35°C)  0% - 70% (35°C - 50°C)
Operating Altitude	2000 m

Safety Specifications
Overvoltage category	Fluke 73 III:  EN 61010-1 to 600 V CAT II Fluke 77 III:  EN 61010-1 to 600 V CAT III/1000V CAT II
Agency Approvals	UL, CSA, TÜV listed

Mechanical & General Specifications
Size	Fluke 73 III:  166 x 75 x 28 mm Fluke 77 III:  190 x 89 37 mm
Weight	Fluke 73 III:  340 g Fluke 77 III:  365 g
Warranty	Lifetime
Battery Life	Alkaline:  ~2000 hours typical
Shock & Vibration	Per MIL-T-PRF 28800F Class III