---
kind: "section"
citation: "21 C.F.R. § 112.124"
title: "21"
number: "112.124"
heading: "What requirements apply to instruments and controls used to measure, regulate, or record?"
url: "https://uscodex.org/cfr/21/112.124"
---

# §112.124. What requirements apply to instruments and controls used to measure, regulate, or record?


Instruments or controls you use to measure, regulate, or record temperatures, hydrogen-ion concentration (pH), sanitizer efficacy or other conditions, in order to control or prevent the growth of microorganisms of public health significance, must be:

- (a) Accurate and precise as necessary and appropriate in keeping with their purpose;
- (b) Adequately maintained; and
- (c) **Adequate in number for their designated uses.**

## Notes

### Authority

Authority: 21 U.S.C. 321, 331, 342, 350h, 371; 42 U.S.C. 243, 264, 271.

### Source

Source: 80 FR 74547, Nov. 27, 2015, unless otherwise noted.