The phrase "a control that" is correct and usable in written English.
It can be used when referring to a specific control mechanism or element in a system, process, or interface.
Example: "The software includes a control that allows users to adjust the volume settings easily."
Alternatives: "a mechanism that" or "an element that".
But guiding it all is a control that is almost unparalleled in jazz at the moment.
Most iPods have a control that allows parents to set a maximum volume.
The pianist offered a fine lesson for students by daring to go out on a limb, letting his playing reach the expressive limits of a control that had earlier seemed on a tighter rein.
When he died, he had a patent pending for a control that would automatically switch off an overheating blanket; he had hoped to provide the device to Japanese manufacturers.
While Bicknell had been manipulating the ball in and out from the Pavilion end, Harmison continued to be rock solid at the other, bowling with a control that had never before been apparent.
A group of finance professionals secured 50 bookings after hiring an expert based in Asia to write a computer program that bypassed a control that was supposed to block multiple ballot entries, Fairfax Media reported.
A novelty that may help in that quest is called Flex Steer, a control that varies the electric power steering assist to a trio of modes, called Comfort, Normal and Sport.
Why would they rush to implement a control that would then directly cut into their ability to make a profit?
The CWD extract was used to simulate CWD leachates (with rainwater as a control) that are produced in the field.
Likewise, a control that is designed to prevent unacceptable risk is not necessarily designed to track the progress of a process.
For the remaining initial conditions, we construct a control that applies maximal input until the guard is reached and then drops to (u_{mathrm{arc}}) until (v_{1}) hits threshold.
