The 2.4GHz antenna developed for the WattWatcher WiFi power meters installs directly onto 20mm electrical conduit, so is simple to install in an optimal location – outside a metal meter box, for instance. The power meters include an internal antenna, and a low loss galvanic isolation structure that ensures safety for the external antenna. The external antenna has slightly better transmit performance, and significantly better receive sensitivity due to the additional distance from noisy electronics. It is manufactured with 700mm of RG174 and is RP-SMA terminated. The antenna gain is 5dB, cable loss is less than 2dB for a nett gain better than 3dB. Any required antenna placement and orientation can be easily achieved using off the shelf conduit fittings (elbows, T-pieces, clamps etc.).