How To Select a Furnace

Digital temperature controls fall into two basic types, process controllers and high limit controls (over temperature controls).
Process Controls handle the temperature and time requirements of the heat treat processes. These controls come in two types, non-programmable (single set point) and programmable.
Non-Programmable controls such as the model 935 are a single set point control, you simply input the desired temperature, along with a length of time to hold thismore
Items
Watlow F4H Control

Watlow F4H Control 250 Step Ramping Control, price is for replacement control
List Price $2,273.00

PM3E

Watlow PM3T Control, price is for replacement.
List Price $380.00

Watlow High Limit Control

Watlow High Limit Control optional Addition to Primary Control, price is for replacement control
List Price $286.00

PM4

Watlow PM4 Standard Control Four 10 Step Program Memory Files, price is for replacement control
List Price $645.00