This gauge-style thermometers are easy to read and use. Velcro on the back means that it can be moved around within the enclosure to monitor multiple areas with a single thermometer. Great for measuring the temperatures of basking spots.
Fluker Farms heat pads are a durable, under-the-tank heat pad designed to run right around a constant 100 degrees! (always use a thermometer for accuracy). Fluker heat pads are a great inexpensive option for undertank heating!