FIELD: applicable in zones with ionizing radiation at current monitoring with galvanic separation of measuring and indicating circuits. SUBSTANCE: the device has a scaled primary transducer, modulator with a body, piezoceramic membrane with a mirror coating, lens, fiber-optic communication channel, photodetector, detector, light source. A continuous- wave YtalGRT: Nd+3 laser is used as a light source; the YtalGRT:Nd+3 laser and the photodetector are optically interconnected via a gate with a variable transmission factor, first focon, input of the fiber-optic brancher, fiber-optic communication channel, lens, piezoceramic membrane with a mirror coating, output of the fiber-optic brancher, second focon. The photodetector output is connected to the DC amplifier input and, via a blocking capacitor, to the AC amplifier input. Its output is coupled to the divider first input, the divider second input is coupled to the first output of the DC amplifier. The divider output is coupled to the detector input. The second output of the DC amplifier is coupled to the detector input. The second output of the DC amplifier is coupled to the first input of the adder, whose second input is electric-coupled to the output of the reference voltage source, and its output - to the gate with a variable transmission factor. EFFECT: enhanced accuracy of measurements and expanded field of application due to provision of measurements in the conditions of ionizing radiation. 1 dwg
