Although both the MJX and RPT series FORJs can be used underwater their pressure ratings are limited (1,000 psi) the RPC series was designed for the ultimate pressure (10,000 psi). Standard units come with stainless steel armored jackets, which can be terminated with ST, FC, or SC connectors or their APC counterparts.

Similar to model RPT, RPC features extremely low insertion loss and high return loss performance for both singlemode and multimode fibers. Model RPCA guarantees 50 dB return loss. These rugged devices can operate under arctic temperature environments.

Note: All insertion loss and return loss measurements are performed by joining the FORJ to the light source through a fusion splice (without the use of connectors). Insertion loss of all receptacle types of FORJs, such as RST, RFC, and RFCX, are measured with connectors of similar type. Their return loss is not measured.