A flow-through measuring cell for accommodating measuring means for measuring chemical and/or physical properties of a fluid which is flowing through the measuring cell, the measuring cell having an inlet opening for entry of the fluid, an outlet opening for exit of the fluid, a, especially single, measuring space which is located between the inlet opening and outlet opening, a radiation measurement region for measuring the interaction of the fluid in the measuring cell with electromagnetic radiation from outside the measuring cell, a conductivity measurement receiver for accommodating conductivity measuring means for measuring the conductivity of the fluid in the measuring cell and/or a pH measurement receiver for accommodating the pH value measuring means for measuring the pH value of the fluid in the measuring cell.