Veracity in terms of accuracy

I want one word which indicates "Something with great veracity". Here, the emphasis of veracity is more towards "accuracy" than "truth".

It's a thing, an instrument that has good veracity.

I want to use this word as a name for such an instrument.

Solution 1:

Senses of veridical, the only word I thought of when I read the question, include “True” and “Pertaining to an experience, perception, or interpretation that accurately represents reality”. However, for a product name one is not limited to real words. I think you would do well to consult translation dictionaries; foreign words may carry more cachet and may be more distinctive. Also look at the etymologies of words of interest; for example, regarding veridical etymonline says “1650s, from L. veridicus, from verum ‘truth,’ neuter of verus ‘true’ (see very) + dic-, stem of dicere ‘to speak’ (see diction)”; from which you might be led to consider combinations involving verum or verus. And so forth with words suggested in other answers. [Note, “naming” is off-topic in ELU (see fifth item in second bullet list of faq), so if you want specific advice about product names, you must ask elsewhere.]

Solution 2:

In the biomedical world, tests (one type of measurement instrument), are often described as sensitive and specific. The sensitivity and specificity are expressed as percentages. An accurate test is one that has, for example, a sensitivity of 95% and a specificity of 97%.

While veracity and accuracy may be sometimes synonyms, I wouldn't describe the results of a scientific instrument's (hardware) measurements, or of a pathology test (biochemical), or of an IQ test (software), or of a political preference poll (software) as honest (which is what veracity implies, but as accurate and trustworthy in the sense that it usually doesn't give false-positives or false-negatives.

I think that accurate is an excellent choice for biochemical and software instruments, but if it's hardware, a precision instrument (i.e., precise) is also an excellent choice.

Solution 3:

In testing, the usefulness of a measuring technique (including instrumental measurements) are characterized by two principal criteria, validity and reliability. See this discussion.

Validity of an assessment is the degree to which it measures what it is supposed to measure.

reliability . . . is the extent to which a measurement gives results that are consistent.

Additional criteria, largely relating to precision are sensitivity and specificity

a test [or instrument administering a test] needs to be sensitive enough to detect the relevant problem [or phenomenon] if it is present (and therefore avoid too many false negative results), but specific enough not to respond to other things (and therefore avoid too many false positive results

Solution 4:

You could simply say the instrument is accurate. From NOAD:

accurate (adj.) 1 (of information, measurements, statistics, etc.) correct in all details; exact : accurate information about the illness is essential.
• (of an instrument or method) capable of giving such information : an accurate thermometer.

If the word accurate isn't "flashy" enough for you, though, I'd recommend precise:

precise (adj.) marked by exactness and accuracy of expression or detail

One other choice: the noun form of precise (i.e., precision), can also be used as an adjective, when referring to instruments:

precision (n.) the quality, condition, or fact of being exact and accurate : the deal was planned and executed with military precision.
• [as adj. ] marked by or adapted for accuracy and exactness : a precision instrument.

As a footnote, the usage of the term precision instruments seems to have really taken off around WWII; there's an interesting Google Ngram, if you're curious.