The autotuning CAL Controls 9900 Series temperature controllers pioneered the market of digital 1/16 DIN (48mm x 48mm) PID controllers in 1986. This series is still supplied to many high volume customers.
The latest 1/16th DIN controller is the CAL Controls 9400 Series Temperature Controller which features much easier programming menus together with a communications option.
The CAL Controls 9900 Series temperature controller features two types of Autotune to ensure optimum control of a wide range of applications.