2-in-1 Combo pH & Temperature Meter Water Quality Tester Replaceable BNC pH Electrode for Aquariums Hydroponics Tanks Aquaculture Laboratory https://www.amazon.com/dp/B07MYVZH4N/ref=cm_sw_r_cp_apa_i_ykLWCb1CQKRWV
I've found this one on Amazon but it has no reviews for it so pretty iffy on it.
For 10 more dollars you can monitor tank ph too.
2-in-1 Combo pH & Temperature Meter Water Quality Tester Replaceable BNC pH Electrode for Aquariums Hydroponics Tanks Aquaculture Laboratory https://www.amazon.com/dp/B07MYVZH4N/ref=cm_sw_r_cp_apa_i_xBpNDb77FVQWG
Or at least get a thermometer designed ed for water instead of roast beef.
Zacro LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature https://www.amazon.com/dp/B01A0TMS6Y/ref=cm_sw_r_cp_apa_i_jDpNDbMB64MC1