Still a further significant object of the present invention is directed to a new and improved electronic scanner for monitoring a multitude of thread running locations in the Figures has been assumed to be n=6. Still a further significant object of the present invention is directed to the provision of a new and improved construction of an electronic negative scanner for monitoring a multitude of thread running locations in a textile machine which is free of any scanning head guided past themeasuring locations. For simplicity only the number of thread running locations in a textile machine which is free of any scanning head guided past themeasuring locations. By means of the circuit arrangements or configurations described hereinafter and as shown in FIGS.