The new Fluke 27 II and 28 II digital multimeters set new standards for use in adverse conditions and have the accuracy needed for troubleshooting electrical systems. Both meters are specified to IP 67 (water and dust tight) and are pending approval according to MSHA (mining applications), the extended operating temperature is between -15 °C and +55 °C for a period of up to 20 minutes, the devices are designed for 95% humidity and have been developed and tested to withstand a drop from 3 meters without any problems. The new Fluke 20 Series multimeters are designed for use in harsh environments