Which live fiber identifier to choose?

There are three different models available: Fujikura FID-30R, Fujikura FID-31R and Viavi Solutions FI-60

Fujikura FID 30-series live fiber identifiers are designed for single fiber and ribbon fibre applications. They display the presence of signal in a fiber, its direction and power. These tools are also equipped with ONU detection function for PON networks. The FID-30R has a built in optical powermeter, the FID-31R does not.

Viavi FI-60 has a built-in power-meter. One has to detach the fiber detection head in order access the PM port.