The phrase 'system indicates that' is correct and usable in written English.
You could use it in a sentence when you're referring to a system providing evidence or feedback about some situation. For example, "The system indicates that the temperature in the room is too low."
Media reports indicate that she pleaded guilty, but an online docket from the Richmond County criminal courts system indicates that Allen has an upcoming appearance.
While on a boat, particularly when not standing on the deck, your visual system indicates that there is not much movement, and your surroundings appear still.
Modeling of a ternary system indicates that high purity tritium can be recoverable from a 'poor' mixture.
ChartBeat, the company's own analytics system, indicates that three million to five million people are on the service in any given month.
Despite a dearth of comprehensive data on prostitution, research by health institutions, universities, and the prison system indicates that most girls active in the Tehran sex trade are high school-age.
Even as most Americans seem to agree that wars can be devastating to the people who fight them, the poor state of the Veterans Affairs system indicates that, as a society, we don't feel much responsibility for such costs.
A case study of the central European electricity system indicates that the improved method is able to approximate the nodal network without a considerable increase in computational cost.
The comparison of this study and Darcian flow case (Hantush and Jacob, 1955) in leaky aquifer system indicates that the error is very small and can be neglected.
A control experiment carried out with conventional 2,2′-azobisisobutyronitrile (AIBN) radical system indicates that copper is required in the depolymerization process.
By introducing a group of virtual states, a Lyapunov-based stability analysis of the closed-loop system indicates that the tracking errors vanish asymptotically.
A simulation study of a 2x2 system indicates that this approach can provide useful robust controllers, which guarantee closed-loop robust stability and performance.
