Everything about basilisk husbandry depends on holding the right temperatures and humidity, so accurate monitoring is the foundation that all other technology builds on. Digital thermometers and hygrometers with probes placed at the basking site, the cool end, and within the humid zone give a true picture of the gradient, replacing the guesswork and notoriously inaccurate stick-on dial gauges of the past.
The advantage of dedicated monitoring devices is that they reveal problems invisible to the eye. A basking spot that has drifted too hot, a cool end that never recovers, or humidity that crashes between mistings all show up on a good monitor long before the animal shows symptoms, letting the keeper correct course early.
Devices that log readings or display minimum and maximum values over time are especially useful, since they capture the overnight lows and midday peaks a keeper never witnesses directly. Reliable data from well-placed sensors is what makes every other piece of automation trustworthy rather than a set-and-forget gamble.