How To Use Progressive Web App aka PWA On 420 Magazine Forum
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I am using a set of HM DIGITAL 80 series PH and ppm pen set , its 2nd from their top of line model and 3 models above their lowest priced model.
It has good reviews
$100 total for both , they are a pleasure to use , come with calibration and storage solution packs.
Has F and C temp settings , so far its accurate with a fast read out and feels like quality in the hand.