yesss i highly recommend the digital zoo meds with the probes. i find they are the most accurate for measuring my heat pad temps because the probes just sit directly on whatever you want them to monitor. They're very precise, not like the stick-ons that just catch the ambient temps (which of course you will want one of those too to put somewhere in the middle of your tank/tub). the zoo-med digi ones with probes and suctions are $10-11 at petco and petsmart.