HPC Series	HMA Series	HMX Series	HMS Series	HMH Series		Deluxe Combo *	Deluxe Combo+ **
Wattage	100, 200, 300	50, 100, 150, 200, 300, 500	50, 100, 150, 200, 300, 500	50, 100, 150, 200, 300, 500	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	Steel	Steel		Nickel***	Nickel***
Control	Push Button	Dial	Touch	Touch	Touch		810M - Push	820M - Push
Display	Digital		Digital	Digital	Digital		Digital	Digital
Range	68-92°F	68-92°F	50-94°F	50-94°F	50-94°F		0-94°F	49.9-94°F
Out-of-water protection	✔ - Sensor Cord			✔ - Sensor Cord	✔ - In-tube (not in HMH-X)		✔ - In-tube	✔ - In-tube
3-Digit Display & Control				✔	✔		✔	✔
1/10th Degree Calibration				✔	✔			✔

*The Deluxe Combo pairs the HC-810M & TH Titanium Tube

**The Deluxe Combo+ pairs the HC-820M & THH Titanium Tube

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