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Kilns and Furnaces from Cress Manufacturing
Kilns and Furnaces from Cress Manufacturing
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Digital Temperature Control

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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 this temperature once achieved. The furnace heats to the desired temperature as fast as possible, holds for the amount of time, then ends the process. At the end of the process, the control can either hold the temperature or let the furnace cool down. The timer can be disabled. When disabled the control only requires a temperature setting input. The furnace will stay at the set temperature until changed or turned off. This is the least expensive standard control.
Programmable Controls such as the models SD4R and the F4H allow the heat up rate to be controlled, temperature can be ramped down as well as ramped up, multi-step heat treating can be input as a single process, and heat treat process programs can be stored in the controls memory for easy and accurate repeatability. In manual mode (non-program), the controls work the same as the model 935 with the timer disabled.
High Limit Controls such as the model LV help protect the furnace and load in the case of a failure in the primary (process) control or other related primary control loop components. The high limit control loop is completely independent of the primary control loop.
All control types are available with an optional audible alarm feature, which can signal a given process point or end of process.
The programmable process controls are available with an optional data communication package which allows full control interface with a computer.





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Item #

Item Name

List Price

WATLOW F4 Watlow F4H Control 250 Step Ramping Control $1,150.00
WATLOW PM3T Watlow PM3E Controls $225.00
WATLOW HLC Watlow High Limit Control optional Addition to Primary Control $190.00
WATLOW PM4 Watlow PM4 Standard Control Four 10 Step Program Memory Files $495.00
  Results 1 - 4 of 4 1