Digital probe thermo-hygrometers are the workhorse of reptile monitoring. A unit with separate probes lets you read temperature and humidity at specific spots—warm end, cool end, basking surface—rather than a vague enclosure average, and many display all of it on a single screen. For an anole, knowing the basking temperature and the ambient humidity at a glance removes most of the guesswork.
An infrared temperature gun complements the fixed probes by reading exact surface temperatures wherever you point it. It is the quickest way to confirm that a basking branch is sitting in the right range and to find cold spots you might otherwise miss.
Higher-end monitors add data logging and app connectivity, which is genuinely useful for spotting trends and for catching problems while you are away from home. Alerts that warn you when temperature or humidity drifts outside a set range turn monitoring from a chore into a safety net.