Fluke 27 II Rugged Digital MultimeterFluke 27 II Rugged Digital Multimeter The standard for rugged The Fluke 27 II Digital Multimeter defines the standard for operating in harsh conditions with the features and accuracy to troubleshoot most electrical problems. Both meters have an IP 67 (waterproof and dustproof) rating, MSHA approvals, an extended operating temperature range of 15 C to +55 C (5 F to 131 F, 40 C for up to 20 minutes) and 95% humidity, and have been designed and tested to