[en] Results are presented concerning the use of spectrometric immersion-type detectors with time-stable parameters and multichannel measuring systems for the remote radiation monitoring applied to the processes of extraction separation and recovery of transplutonium elements (TPE). Processes involved in the manufacture of the detectors suitable for hostile environmental conditions are described. Spectra of the solutions containing α- or β-radiators (²⁴⁴Cm-²⁵²Cf-²⁵³Es) have been measured. Results are given of the remote measurements as compared with laboratory analysis data obtained by sampling and sample treatment. These results show promise for the practical utilization of the equipment developed