The SM40G is a broadband EM Field Meter housed in a durable metal shell with an integrated temperature sensor and GPS unit, providing  X, Y, and Z analog output. This meter uses ARLinkwARe software in order to display its measurements and data over the optical interface. It also allows the user to perform continuous monitoring activities, and to periodically store the measured values over more than 24 hours of recording time.

ELF/VLF Survey Meters from Narda Safety Test Solutions...
The 8400 Series Mini-Power Meter is an inexpensive, portable and battery operated power measurement system. Consisting of the model 8441 power meter, the model 8440-01 extension cable and one or more of the 842X series of power mounts, this system allows accurate measurements at frequencies up to 26.5 GHz...

The Model PM2003 is a three-channel, high performance power meter that features high speed measurement capability and wide dynamic range.

The ML2438A Power Meter combines the advantages of thermal meter accuracy, diode meter speed, and peak power meter display graphics. The result is a single instrument that samples at more than 35K per second and achieves 90 dB dynamic range with a single sensor

The ML2488B Wideband Peak Power Meter provides accurate peak power measurement for communications, wireless, and aerospace applications. For the design and implementation of wireless networks, they address the important issues of power control, peak power, and timing.

The Krytar Model 9000B is a low cost, high performance CW power meter using a diode-based power sensor.

An impedance meter has been released to measure the impedance of lines from 5 to 100 kW