The new Fluke 27 II and 28 II digital multimeters define a new standard for operating in harsh conditions with the features and accuracy to troubleshoot most electrical problems. Both meters have IP 67 (waterproof and dustproof) rating, MSHA approvals, extended operating temperature range of -15 degrees Celsius to +55 degrees C (5 to 131 details Fahrenheit) and 95 percent humidity, and can withstand a 3-meter (10 foot) drop.