FIELD: devices for check of moving fibre for condition on textile equipment. SUBSTANCE: sensor has electronic information estimation unit made in form of two threshold devices, two one-shot vibrators, integrator and pulse shaper which makes it possible to perform check through measurement of time interval; time of generation of signal on presence of fibre is equal to or less than fibre ballooning period; in case of breakage of fibre, time of generation of signal slightly exceeds fibre ballooning period. Besides that, estimation unit is provided with amplifier at frequency dependence feedback and signal amplitude limiter which enhances noise immunity of sensor. Increased speed of response and enhanced noise immunity make it possible to use successive method of estimation of signals in checking the moving fibre by successively connecting to main information processing circuit of sensitive elements with resistance converters by means of electronic commutator and counter. EFFECT: simplified construction and low cost of sensor. 3 dwg
