HPC Series	HMA Series	HMX Series	STE Series	HMH Series		Deluxe Combo	Deluxe Combo+
Wattage	100, 200, 300	50, 100, 150, 200, 300, 500	50, 100, 150, 200, 300, 500	200, 400, 600, 800	100, 150, 200, 300, 500		300, 500, 800	300, 500, 800
Heating Tube Material	Quartz Glass	Titanium	Titanium	Titanium	Titanium		TH Tube - Titanium	TH Tube - Titanium
Heating Coil Material	Steel	Steel	Steel	Nickel*	Steel		Nickel*	Nickel*
Control	Push	Dial	Touch	Push	Touch		810M - Push	820M - Push
Display	Digital		Digital	Digital	Digital		Digital	Digital
Range	68-92°F	68-92°F	50-94°F	68-92°F	50-94°F		0-94°F	49.9-94°F
Out-of-water protection	✔  Sensor Cord			✔   Non-resumable Fuse	✔   In-tube (not in HMH-X)		✔   In-tube	✔   In-tube
3-Digit Display & Control					✔		✔	✔
1/10th Degree Calibration					✔			✔
Japanese Components				✔
UL STD / ETL Listed				✔

*Nickel coils are able to sustain higher wattages, quicker heat dissipation times, and a superior overall quality build over other metal heating coils