The utility model relates to ultrasonic devices for non-contact measurement of surface density of textile materials. The ultrasonic device contains generators of sinusoidal voltage and rectangular pulses, a key modulator, an amplifier, first emitting and receiving piezoelectric transducers, second emitting and receiving piezoelectric transducers, two multiplexers, an amplifier with adjustable gain, a detector, a microcontroller, an indicator, a phase-sensitive rectifier, a high-pass filter, an integrator, a reference voltage source.
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