---
kind: "section"
citation: "40 C.F.R. § 1065.250"
title: "40"
number: "1065.250"
heading: "Nondispersive infrared analyzer."
url: "https://uscodex.org/cfr/40/1065.250"
---

# §1065.250. Nondispersive infrared analyzer.

- (a) **Application.** Use a nondispersive infrared (NDIR) analyzer to measure CO and CO2 concentrations in raw or diluted exhaust for either batch or continuous sampling.
- (b) **Component requirements.** We recommend that you use an NDIR analyzer that meets the specifications in Table 1 of [§ 1065.205](/cfr/40/1065.205.md). Note that your NDIR-based system must meet the calibration and verifications in §§ [1065.350](/cfr/40/1065.350.md) and [1065.355](/cfr/40/1065.355.md) and it must also meet the linearity verification in [§ 1065.307](/cfr/40/1065.307.md).

## Notes

### Amendments

[76 FR 57442, Sept. 15, 2011, as amended at 79 FR 23761, Apr. 28, 2014]

### Authority

Authority: 42 U.S.C. 7401-7671q.

### Source

Source: 70 FR 40516, July 13, 2005, unless otherwise noted.

### Amendments

[76 FR 57442, Sept. 15, 2011, as amended at 79 FR 23761, Apr. 28, 2014]