The T-Rad | 201849 from Gentec-EO is a Terahertz Digital Radiometer that has power scales of 200 nW, 2 μW, 20 μW, 200 μW, 2 mW, 20 mW, and 200 mW. It has an accuracy of ± 1% ± 3 μV from 10% to full scale and a resolution of current scale/3000. This radiometer has an integration time range of 0.1 seconds - 50 seconds and a data transfer rate of 5 Hz. It has a single channel and can be controlled via a PC interface. This radiometer requires a DC supply voltage of 9 V - 15 V and consumes 1 A of current. It is available in a package that measures 147 mm (L) x 106mm (W) x 34 mm (H).