HPC Series	HMA Series	HMU Series	HMK Series	STE Series Series		Deluxe Combo	Deluxe Combo+
Wattage	100, 200, 300	50, 100, 150, 200, 300, 500	100, 200, 300, 400, 500	50, 100, 150, 200, 300, 500	200, 400, 600, 800		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	Steel	Nickel*		Nickel*	Nickel*
Control	Push	Dial	Push	Touch	Push		810M - Push	820M - Push
Display	Digital		Digital	Digital	Digital		Digital	Digital
Range	68-92°F	68-92°F	68-92°F	68-92°F	68-92°F		0-94°F	49.9-94°F
Out-of-water protection	✔  Sensor Cord		✔  Non-resumable Fuse	✔  Non-resumable Fuse	✔  Non-resumable Fuse		✔   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