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title: Felix Knowledge Base
description: Felix Knowledge Base
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- [Submit a Support Ticket](https://felixinstruments.com/food-science-instruments/nir-spectroscopy/f-750-produce-quality-meter/support/#SubmitaTicket)

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### [NIR Analysis Tools](https://knowledgebase.felixinstruments.com/nir-analysis-tools?hsLang=en)

- [What variety of fruit was the F-751 Kiwifruit model built with?](https://knowledgebase.felixinstruments.com/what-variety-of-fruit-was-the-f-751-kiwi-model-built-using?hsLang=en)
- [What avocado types is the F-751 Avocado designed to work with?](https://knowledgebase.felixinstruments.com/what-avocado-types-is-the-f-751-avo-designed-to-work-with?hsLang=en)
- [How do I change the language of my device?](https://knowledgebase.felixinstruments.com/how-do-i-change-the-language-of-my-device?hsLang=en)

[See more](https://knowledgebase.felixinstruments.com/nir-analysis-tools?hsLang=en)

### [Gas Analysis Tools](https://knowledgebase.felixinstruments.com/gas-analysis-tools?hsLang=en)

- [How often do I need to recalibrate my gas analyzer?](https://knowledgebase.felixinstruments.com/how-often-do-i-need-to-recalibrate-my-gas-analyzer?hsLang=en)
- [Distilled vs. Deionized Water for Polarcept](https://knowledgebase.felixinstruments.com/distilled-vs.-deionized-water-for-polarcept?hsLang=en)
- [If running my F-9xx continuously, how many days of measurements can the 16GB SD card hold?](https://knowledgebase.felixinstruments.com/if-running-my-f-9xx-continuously-how-many-days-of-measurements-can-the-16gb-sd-card-hold?hsLang=en)

[See more](https://knowledgebase.felixinstruments.com/gas-analysis-tools?hsLang=en)

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