Fluke has developed what it claims is the first digital multimeter (DMM) with a detachable wireless display. The Fluke 233 DMM uses wireless transmissions to send measurements to the display up to 10m away, allowing users to place the display where it can be seen most easily, while putting the meter in the best position to take measurements.

The radio transmitter turns on automatically when the display is slid out of the meter body, and off again when the display is re-attached. When the display is attached, the DMM operates as a conventional multimeter. The removable display has a flat, magnetic bottom, allowing it to be mounted or placed on a flat surface. The low-power 2.4GHz wireless transmissions resist electromagnetic interference.

The DMM makes it easier to take measurements in hard-to-reach places, or in machines or panels that are separated from limit or isolator switches. It also allows users to run tests and read results at a safe distance from shock and arc hazards, moving machinery and other dangers.

The DMM can display readings even when the test point is in the next room or is hidden behind an enclosure. It is said to be ideal for clean rooms or hazardous areas where the operator cannot be close to the active measurement point.

The Fluke 233 measures voltages up to 1kV AC and DC, and currents up to 10A. It has a 10,000µF capacitance range, measures frequencies to 50kHz, and captures minimum, maximum and average readings automatically. It has a 6,000-count display and a built-in thermometer that enables users to take temperature readings without needing a separate instrument. The DMM is rated for use in CAT IV 600V/CAT III 1000V environments.