{"id":3492,"date":"2025-07-31T18:12:32","date_gmt":"2025-07-31T18:12:32","guid":{"rendered":"https:\/\/discover.restek.com\/?p=3492"},"modified":"2025-12-08T18:57:22","modified_gmt":"2025-12-08T18:57:22","slug":"what-critical-orifice-should-i-select-based-on-my-canister-size-and-sampling-time-requirements","status":"publish","type":"post","link":"https:\/\/discover.restek.com\/es\/faq\/gnot4980\/what-critical-orifice-should-i-select-based-on-my-canister-size-and-sampling-time-requirements","title":{"rendered":"What critical orifice should I select based on my canister size and sampling time requirements?"},"content":{"rendered":"\n

The following table lists the recommended orifice diameters, associated flow rate ranges, and canister volumes and sampling times:<\/p>\n\n\n\n

Canister Volume\/Sampling Time<\/strong><\/td> <\/td>Orifice<\/strong><\/td>Siltek-Treated<\/strong><\/td>Stainless Steel<\/strong><\/td><\/tr>
400 cc<\/strong><\/td>1 Liter<\/strong><\/td>3 Liter<\/strong><\/td>6 Liter<\/strong><\/td>15 Liter<\/strong><\/td>Flow<\/strong><\/td>Size<\/strong> <\/td>cat.#<\/strong><\/td>cat.#<\/strong><\/td><\/tr>
8 hour<\/td>24 hour<\/td>48 hour<\/td>125 hour<\/td>\u2014<\/td>0.5\u20132 mL\/min<\/td>0.0008″<\/td>24217<\/a><\/td>24216<\/a><\/td><\/tr>
2 hour<\/td>4 hour<\/td>12 hour<\/td>24 hour<\/td>60 hour<\/td>2\u20134 mL\/min<\/td>0.0012″<\/td>24160<\/a><\/td>24165<\/a><\/td><\/tr>
1 hour<\/td>2 hour<\/td>6 hour<\/td>12 hour<\/td>30 hour<\/td>4\u20138 mL\/min<\/td>0.0016″<\/td>24161<\/a><\/td>24166<\/a><\/td><\/tr>
\u2014<\/td>1 hour<\/td>4 hour<\/td>8 hour<\/td>20 hour<\/td>8\u201315 mL\/min<\/td>0.0020″<\/td>24162<\/a><\/td>24167<\/a><\/td><\/tr>
\u2014<\/td>\u2014<\/td>2 hour<\/td>3 hour<\/td>8 hour<\/td>15\u201330 mL\/min<\/td>0.0030″<\/td>24163<\/a><\/td>\u2014<\/td><\/tr>
\u2014<\/td>\u2014<\/td>1 hour<\/td>1.5 hour<\/td>4 hour<\/td>30\u201380 mL\/min<\/td>0.0060″<\/td>24164<\/a><\/td>24169<\/a><\/td><\/tr>
\u2014<\/td>\u2014<\/td>\u2014<\/td>0.5 hour<\/td>1 hour<\/td>80\u2013340 mL\/min<\/td>0.0090″<\/td>22101<\/a><\/td>\u2014<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

The following table lists the recommended orifice diameters, associated flow rate ranges, and canister volumes and sampling times: Canister Volume\/Sampling Time   Orifice Siltek-Treated Stainless Steel 400 cc 1 Liter 3 Liter 6 Liter 15 Liter Flow Size cat.# cat.# 8 hour 24 hour 48 hour 125 hour \u2014 0.5\u20132 mL\/min 0.0008″ 24217 24216 2…<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[23],"tags":[2677,2691],"industries-application":[],"post-badge":[],"resource-type":[],"product-library":[2443,2449],"resource-technique":[],"hf_cat_post":[625],"ppma_author":[414],"class_list":["post-3492","post","type-post","status-publish","format-standard","hentry","category-faq","tag-faq-air-sampling","tag-faq-air-sampling-canisters","product-library-echantillonnage-dair-et-de-gaz","product-library-canisters-accessoires"],"acf":[],"taxonomy_info":{"category":[{"value":23,"label":"FAQ"}],"post_tag":[{"value":2677,"label":"FAQ: 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