The phrase "ancillary instruments" is correct and usable in written English.
It can be used in contexts where you are referring to supplementary tools or resources that support a primary function or purpose.
Example: "The project requires several ancillary instruments to ensure its success, including software tools and data analysis methods."
Alternatives: "supporting tools" or "supplementary resources".
Special solar telescopes have been constructed, however, for investigations of the Sun that require the use of such ancillary instruments as spectroheliographs and coronagraphs.
Hysteroscopy has widely been used for diagnosis of the uterine cavity; however, target biopsy has often been difficult in part to the inherent limitations of ancillary instruments.
The implants and ancillary instruments ensured consistent and facile placement of the PEEK plates.
In addition, the ancillary instruments are suitable for either the direct anterior (DA) or the posterolateral (PL) approach.
Compared to the noninvasive ESWL method, ureteroscopic lithotripsy has the advantage of removal of renal and ureteric calculi, although retrograde access can be challenging and ancillary instruments such as the Kumpe catheter may be required to aid in cannulation [ 62].
The device, which has no electronic component, is simple, light and can be considered as an ancillary instrument.
Nevertheless, measurement uncertainties on the data would limit the accuracy, and the data remains unknown for some unmanned aerial vehicles without ancillary instrument.
In principle, it is possible to compute the residual RCM from orbit and attitude data provided by an ancillary instrument such as inertial measurement units (IMU) and global positioning system (GPS).
Also, the results show that governments may elect to change the combinations of these design elements, introduce other ancillary policy instruments and regulatory mechanisms, and reshape the FiT schemes in order to accommodate significant shifts in public policies.
The Crosstrek's external-temperature gauge, housed in an unobtrusive, dashboard-top row of ancillary digital instruments (clock, fuel-economy gauge, passenger airbag light), seemed to drop a degree for every mile travelled.
This schedule is then integrated into the overall Vacuum Vessel schedule, which includes ancillary activities such as instruments, preliminary design and analysis.
