--- title: O.K. Cycle | Mesa Labs description: The Mesa O.K. Cycle multispot Chemical Integrator strips are designed for pre-vacuum steam sterilizers and provide easy-to-read sterilization confirmation. image: https://lynton-sb3-mesalabs-20969579.hs-sites.com/hubfs/website/solutions/solutions/sterilization%20and%20cleaning%20monitoring/Products/ProChem%20O.K.%20Cycle/prochem-ok-cycle-main.png --- # O.K. Cycle 1. [Home](https://lynton-sb3-mesalabs-20969579.hs-sites.com) 2. caret-right icon [Our Solutions](https://lynton-sb3-mesalabs-20969579.hs-sites.com/solutions) 3. caret-right icon 4. caret-right icon [Products](https://lynton-sb3-mesalabs-20969579.hs-sites.com/products/) 5. caret-right icon O.K. Cycle ![prochem-ok-cycle-main](https://lynton-sb3-mesalabs-20969579.hs-sites.com/hs-fs/hubfs/website/solutions/solutions/sterilization%20and%20cleaning%20monitoring/Products/ProChem%20O.K.%20Cycle/prochem-ok-cycle-main.png?width=600&height=600&name=prochem-ok-cycle-main.png) ![prochem-ok-cycle-main](https://lynton-sb3-mesalabs-20969579.hs-sites.com/hs-fs/hubfs/website/solutions/solutions/sterilization%20and%20cleaning%20monitoring/Products/ProChem%20O.K.%20Cycle/prochem-ok-cycle-main.png?width=45&height=45&name=prochem-ok-cycle-main.png) ## The Mesa O.K. Cycle multispot Chemical Integrator strips are designed for use in pre-vacuum steam sterilizers operating at 121° C and at 134°C (ISO 11140-1:2005 compliant as a Class 5 Integrator). Used as directed the Mesa O.K. Cycle integrator strips give visual confirmation that sterilization conditions were met at point of placement in the sterilizer chamber. During steam sterilization, the four indicators spots change from purple to green. For 121°C cycles, verify that indicator spots 1, 2, and 3 have changed from purple to green. Spot 4 will change to green in sterilization cycles exceeding 35 minutes. For 134° C cycles, verify that indicator spots 1 and 2 have changed from purple to green. Spot 3 changes to green after spot 2 giving the user more information about the cycle. See critical parameters chart. Spot 4 will change to green in sterilization cycles exceeding 12 minutes.   [ GET A QUOTE ](http://lynton-sb3-mesalabs-20969579.hs-sites.com/sterilization-cleaning-monitoring/quote-request?sdc_product_list=Other) [ Contact Mesa ](http://lynton-sb3-mesalabs-20969579.hs-sites.com/-temporary-slug-a4a5fb9b-2074-47fe-bfaa-19aded6d599c) Technical Specifications Document Downloads ### Technical Specifications ## O.K. Cycle --- - Catalog # CI-OK - 250 indicators/bag - Expires 2 years from date of manufacture - International use only | **Spot** | 1 | 2 | 3 | 4 | | --- | --- | --- | --- | --- | | **121 Degrees C** | 8 minutes | 11 minutes | 17 minutes | 30 minutes | | **134 Degrees C** | 3.25 minutes | 4.5 minutes | 7 minutes | 11 minutes | ### Document Downloads - [ProChem Chemical Indicators (Brochure)](https://info.mesalabs.com/hubfs/20-Literature-SDC-Chemical-Indicators-R06.pdf) - [OK Cycle (Brochure)](https://lynton-sb3-mesalabs-20969579.hs-sites.com/hubfs/sporemind/public/ProChem%20OK%20Brochure.pdf) - [ProChem O.K. Cycle Integrator Indications for Use](https://info.mesalabs.com/hubfs/1.%20Sterilization%20and%20Disinfection%20Control/Website/IFUs/CI-OK%20IFU.pdf) ### Related products #### [![Air Removal Bowie-Dick Type Tests](https://lynton-sb3-mesalabs-20969579.hs-sites.com/hs-fs/hubfs/website/solutions/solutions/sterilization%20and%20cleaning%20monitoring/Products/Air%20Removal/air-removal-tests-main.jpg.png?width=300&height=300&name=air-removal-tests-main.jpg.png) Air Removal Bowie-Dick Type Tests The Air Removal Bowie-Dick Type Test Packs evaluate the air removal system performance of pre-vacuum equipped steam sterilizers. ](http://lynton-sb3-mesalabs-20969579.hs-sites.com/products/sterilization-cleaning-monitoring/air-removal-bowie-dick-tests) #### [![ProChem SSI](https://lynton-sb3-mesalabs-20969579.hs-sites.com/hs-fs/hubfs/mesalabs%20website/solutions/solutions/sterilization%20and%20cleaning%20monitoring/Products/ProChem%20SSI/prochem-ssi-main.png?width=300&height=300&name=prochem-ssi-main.png) ProChem SSI ProChem SSIs are easily readable tests used to verify the steam sterilization of packs/pouches.](http://lynton-sb3-mesalabs-20969579.hs-sites.com/products/sterilization-cleaning-monitoring/prochem-ssi) #### [![ProChem SSW](https://lynton-sb3-mesalabs-20969579.hs-sites.com/hs-fs/hubfs/website/solutions/solutions/sterilization%20and%20cleaning%20monitoring/Products/ProChem%20SSW/prochem-ssw-main.jpg.png?width=300&height=300&name=prochem-ssw-main.jpg.png) ProChem SSW ProChem SSW Steam Sterilization Integrator is a single use Class 5 Integrating Indicator that shows whether proper steam sterilization has been achieved.](http://lynton-sb3-mesalabs-20969579.hs-sites.com/products/sterilization-cleaning-monitoring/prochem-ssw) ### Related services [![Contract studies laboratory](https://lynton-sb3-mesalabs-20969579.hs-sites.com/hubfs/mesalabs%20website/solutions/solutions/sterilization%20and%20cleaning%20monitoring/Services/Contract%20Studies/contractStudies.jpg) #### Contract studies laboratory Mesa’s independent contract studies laboratory performs certified and compliant third-party chemical and biological indicator testing and verification. 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