Ph Meters I need advice

What brand are they??

where can you purchase it online? Thanks for your hrlp.

thanks for your help.

Bluelab is the brand and one other thing I like is the display lights up for a short time when you put it on.

This is the one I have:

https://www.amazon.com/gp/product/B01ESYG6KQ/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

The Apera phb3. I got it for $36 on amazon. It’s that brand’s cheapest pen, but so far, so good. It automatically temp adjusts, has auto cal, has one point cal, and comes with a good warranty.

The Apera ph20 also looked good, but it’s about $15 more.

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