eCFR Reference Browser

---

title: "40 CFR §1065.248"

source: "https://www.ecfr.gov/current/title-40/section-1065.248"

title_number: "40"

volume_number: "37"

chapter_number: "Unknown"

subchapter_code: "U"

subchapter_subject: "AIR POLLUTION CONTROLS"

part_code: "1065"

part_subject: "ENGINE-TESTING PROCEDURES"

subpart_code: "C"

subpart_subject: "Measurement Instruments"

section_number: "1065.248"

section_subject: "Gas divider."

cfr_reference: "40 CFR 1065.248"

title_name: "Title 40"

title_subject: "Protection of Environment"

parts_covered: "Part 1060 to End"

revised_date: "Revised as of July 1, 2019"

publication_date: "As of July 1, 2019"

contains_description: "Containing a codification of documents of general applicability and future effect"

publication_info: "Published by the Office of the Federal Register National Archives and Records Administration as a Special Edition of the Federal Register"

---

(a)Application. You may use a gas divider to blend calibration gases.

(b)Component requirements. Use a gas divider that blends gases to the specifications of § 1065.750 and to the flow-weighted concentrations expected during testing. You may use critical-flow gas dividers, capillary-tube gas dividers, or thermal-mass-meter gas dividers. Note that your overall gas-divider system must meet the linearity verification in § 1065.307.

§1065.248 - Gas divider.