Heating system alarm/failsafe devices?

[Cheesenugget]

Spyder Robotics Herpstat. No thermometer, won't text you unless they made a new model that can do that. But they do have an alarm when the threshold for highest and lowest temp is passed. Then it shuts off (Supposedly). The alarm do work for sure, not super loud but keeps beeping until you either stop the alarm; temp goes back to normal; or I think in about 30 min, it will shut off the heat on its own.

[Luvyna]

Spyder Robotics Herpstat. No thermometer, won't text you unless they made a new model that can do that. But they do have an alarm when the threshold for highest and lowest temp is passed. Then it shuts off (Supposedly). The alarm do work for sure, not super loud but keeps beeping until you either stop the alarm; temp goes back to normal; or I think in about 30 min, it will shut off the heat on its own.

Thanks for the recommendation! Definitely going upgrade to one of these. I'm still wondering if an independent thermometer alarm exists though, since the issue with mine originated from the temperature probe getting messed up and I want to have a backup so that doesn't happen again.