Confused on thermostats, proportional thermostat, herpstat?

[Vypyrz]

So do you think I should upgrade? I use a johnson controls thermostat but dont know whats better really.

Herpstat is a brand made by Spyder Robotics.
There are 2 types of thermostats, Proportional and On/Off.
Proportional thermostats are always on. They work by constantly adjusting the amount of power to the heat source to maintain the desired temp. Herpstats and Helix are proportional thermostats.
On/Off thermostats do not adjust the power. They cycle On and Off to maintain the correct temperatures. Most of the entry level thermostats like the ReptiTemp 500R and ALife are this type. The Johnson and Ranco thermostats are also this type, but they are designed for commercial heating and air conditioning applications. It just so happens that they work great for reptile heating as well. The Johnson will work for a rack, it all comes down to what you want. If you decide to go with a Proportional, you can always keep the Johnson as a spare for heating Quarantine enclosures. I use mine to regulate the space heater that I have in my herp room...