Temperature Control: Having Trouble Seeing Your Watlow F4 Display?
The Watlow F4 temperature control module was introduced in 1999 as a high end workhorse instrument. It is a very powerful, feature packed, easy to program controller with a back-lit LED display that allows the user to access the controls manual from the front panel.

The F4 temperature controller has been the controller of choice for ovens, environmental chambers and various process applications for many years. As time goes by, the LED back light in the Watlow F4 display can deteriorate, making the reading hard to see in some lighting conditions. The control will still function fine; but making programming changes can be difficult. We can replace the display on your F4 controller for a flat fee that is substantially less then the cost of a replacement controller.
So if you find you can’t see the display numbers the next time you need to change the set-point, give us a call and we will help you get your F4 display back to its bright shiny self again. Or, if you need a spare, let us know and we can help you with that as well.
This post was authored by Dave Safford, resident thermal applications expert at IES Technical Sales. You can find out more about Dave at: http://www.linkedin.com/in/davesafford
IES Technical Sales is a value added technical sales, distribution, and solutions provider serving the high technology vacuum, plasma/thin film, temperature, fluid handling and metrology markets.