New product on Aliexpress at a fairly fair price. It is a finished sensor tube with two FGM-3 sensors that are aligned and calibrated. The hobbyist, the customer, does not have to do additional work to make this kind of pipe, which has been a problem for many people until now.
https://vi.aliexpress.com/item/10050...yAdapt=glo2vnm
https://vi.aliexpress.com/item/10050...yAdapt=glo2vnm
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