{"product_id":"rki-calibration-gas-cylinders","title":"RKI Calibration Gas Cylinders","description":"\u003cp\u003eRKI calibration gas cylinders provide certified reference concentrations for bump testing and calibrating RKI portable and fixed gas detectors. Available in single-gas and multi-gas mixtures across steel and aluminum cylinders in several sizes, each cylinder is factory-certified to a specific concentration and expiration date.\u003c\/p\u003e\n\u003cp\u003eThe configurations listed here cover the most commonly ordered single gases (methane, hydrogen, propane, hexane, isobutane, CO, H2S, NH3, O2, SO2, NO2, NO, Cl2, HCl, HCN, CO2, SiH4, zero air, nitrogen) and multi-gas mixes (4-gas confined-space mix, H2S\/CO\/CH4\/O2). Additional gas types, concentrations, and cylinder sizes are available by quote — \u003ca href=\"\/collections\/rki-instruments-parts-accessories\"\u003esee our full RKI Instruments Parts \u0026amp; Accessories collection\u003c\/a\u003e for regulators and calibration accessories.\u003c\/p\u003e","brand":"RKI Instruments","offers":[{"title":"CH4 (Methane) 50% LEL in Air, 34L Steel","offer_id":48206601060542,"sku":"81-0010RK-01","price":43.5,"currency_code":"USD","in_stock":true},{"title":"H2 (Hydrogen) 1000 ppm in Air, 34L Steel","offer_id":48206601093310,"sku":"81-0000RK-01","price":43.5,"currency_code":"USD","in_stock":true},{"title":"Propane 25% LEL in Air, 34L Steel","offer_id":48206601126078,"sku":"81-0003RK-01","price":43.5,"currency_code":"USD","in_stock":true},{"title":"Hexane 15% LEL in Air, 34L Steel","offer_id":48206601158846,"sku":"81-0007RK-01","price":43.5,"currency_code":"USD","in_stock":true},{"title":"Isobutane 500 ppm in Air, 34L Steel","offer_id":48206601191614,"sku":"81-0017RK-01","price":43.5,"currency_code":"USD","in_stock":true},{"title":"Isobutylene 100 ppm in Air, 34L Steel","offer_id":48206601224382,"sku":"81-0103RK-01","price":43.5,"currency_code":"USD","in_stock":true},{"title":"Zero Air, 34L Steel","offer_id":48206601257150,"sku":"81-0076RK-01","price":43.5,"currency_code":"USD","in_stock":true},{"title":"N2 (Nitrogen) 100%, 34L Steel","offer_id":48206601289918,"sku":"81-0078RK-01","price":43.5,"currency_code":"USD","in_stock":true},{"title":"H2S 50 ppm \/ Isobutane 50% LEL in N2, 58AL","offer_id":48206601322686,"sku":"81-0140RK-02","price":171.0,"currency_code":"USD","in_stock":true},{"title":"NH3 (Ammonia) 5 ppm in N2, 58AL","offer_id":48206601355454,"sku":"81-0173RK-02","price":225.0,"currency_code":"USD","in_stock":true},{"title":"SO2 5 ppm in N2, 58AL","offer_id":48206601388222,"sku":"81-0170RK-02","price":126.0,"currency_code":"USD","in_stock":true},{"title":"NO2 10 ppm \/ CO 50 ppm \/ O2 12% \/ CH4 2.5% in N2, 58AL","offer_id":48206601420990,"sku":"81-0168RK-02","price":228.0,"currency_code":"USD","in_stock":true},{"title":"NO (Nitric Oxide) 25 ppm in N2, 58AL","offer_id":48206601453758,"sku":"81-0181RK-02","price":225.0,"currency_code":"USD","in_stock":true},{"title":"Cl2 (Chlorine) 5 ppm in N2, 34AL","offer_id":48206601486526,"sku":"81-0190RK-04","price":173.25,"currency_code":"USD","in_stock":true},{"title":"HCl (Hydrogen Chloride) 10 ppm in N2, 58AL","offer_id":48206601519294,"sku":"81-0194RK-02","price":225.0,"currency_code":"USD","in_stock":true},{"title":"HCN (Hydrogen Cyanide) 10 ppm in N2, 58AL","offer_id":48206601552062,"sku":"81-0196RK-02","price":225.0,"currency_code":"USD","in_stock":true},{"title":"SiH4 (Silane) 5 ppm in N2, 58AL","offer_id":48206601584830,"sku":"81-0165RK-02","price":315.0,"currency_code":"USD","in_stock":true},{"title":"CH2O (Formaldehyde) 5 ppm in N2, 58AL","offer_id":48206601617598,"sku":"81-9050RK-02","price":205.5,"currency_code":"USD","in_stock":true},{"title":"O2 0.4% in N2, 103L Steel","offer_id":48206601650366,"sku":"81-9034RK-03","price":118.5,"currency_code":"USD","in_stock":true},{"title":"CO2 35% \/ CH4 50% Vol Balance N2, 34L Steel","offer_id":48206601683134,"sku":"81-0025RK-01","price":43.5,"currency_code":"USD","in_stock":true},{"title":"Toluene 400 ppm in Air, 34AL","offer_id":48206601715902,"sku":"81-0102RK-04","price":118.5,"currency_code":"USD","in_stock":true},{"title":"4-Gas Mix: H2S 50 ppm \/ CO 500 ppm \/ CH4 50% LEL \/ O2 18%, 58AL","offer_id":48206601748670,"sku":"81-0133RK-02","price":158.25,"currency_code":"USD","in_stock":true},{"title":"H2S 25 ppm \/ CO 50 ppm \/ CH4 50% LEL \/ O2 12% in N2, 58AL","offer_id":48206601781438,"sku":"81-0154RK-02","price":150.0,"currency_code":"USD","in_stock":true},{"title":"CH4 50% LEL in Air, 100AL Refillable","offer_id":48206601814206,"sku":"81-0012RK-R100","price":138.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/9926\/6750\/files\/mainLogo_67dc3be5-250c-4bb6-837f-73be99a332c0.png?v=1785128004","url":"https:\/\/envirotechonline.com\/products\/rki-calibration-gas-cylinders","provider":"EnviroTech Services","version":"1.0","type":"link"}