Arrangement for optical measurement of a process variable and measuring device comprising such an arrangement

摘要

An arrangement for optical measurement of at least one process variable in a medium, comprising: at least one light source; at least one light receiver; an optical sensor element at least one data processing unit; and a light conductor. The light conductor connects the light source with the optical sensor element and the optical sensor element with the light receiver. The light conductor is embodied with at least three arms, wherein the first arm is arranged at the light source, the second arm is arranged at the light receiver and the third arm is arranged at the optical sensor element first arm and the second arm combine to form the third arm. The invention relates further to a measuring device comprising an above described arrangement.

主权项

1. A measuring device, comprising:
at least one light source for transmitting light; at least one light receiver for receiving light; said light receiver transduces received light into an electrical, measured variable; an optical sensor element, said optical sensor element is located at least partially in contact with the medium and converts transmitted light into received light; and at least one data processing unit for operating and controlling said at least one light source and/or for processing the electrical, measured variable into the process variable; and a light conductor, wherein: said light conductor connects said at least one light source with said optical sensor element, and said optical sensor element with said light receiver; said light conductor is embodied with at least three arms and has a first arm, a second arm and a third arm; said first arm is arranged at said at least one light source in such a manner that transmitted light enters into said first arm; said second arm is arranged at said light receiver in such a manner that received light from the second arm enters into said light receiver; said third arm is arranged at said optical sensor element in such a manner that transmitted light from said third arm strikes the optical sensor element and received light from said optical sensor element enters into said third arm; and said first arm and said second arm combine to form said third arm; wherein: the measuring device includes a sensor-side component and a transmitter-side component; the arrangement is positioned on/in said sensor-side component; energy is transmitted unidirectionally from said transmitter-side component to said sensor-side component and data are transmitted bidirectionally; said sensor-side component and said transmitter-side component are coupled with one another via a galvanically isolated connection or said sensor-side component and said transmitter-side component are galvanically coupled and are connected with a control system via a galvanically isolated connection.