Anyone have any experience with non-Apex probes? I got some used ones with Apex system and modules, one wouldn't hold calibration anymore so I bought a new Apex probe several months ago at a hefty price. The calibration held for a week then shifted, started reading low, so I bought an $8 probe on eBay and calibrated it and re-calibrated the Apex to run together, I'll compare reliability and longevity. So far they seem equal.
Look at this on eBay
https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.com/ulk/itm/112650779679
Look at this on eBay
https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.com/ulk/itm/112650779679