This is the pH meter i swear by and doesnt fail me as long as calibrated

Digital pH Meter with ATC pH Tester, 3 in 1 pH TDS Temp 0.01 Resolution High Accuracy Pen Type Tester, Water Tester for Water, Wine, Spas, Aquariums https://www.amazon.com/dp/B08RD488NP/ref=cm_sw_r_apan_glt_fabc_XE5D47FAH2Z5NR919V3W?_encoding=UTF8&psc=1