CAL Controls was established in 1963 in Hertfordshire, UK.

CAL’s product development philosophy resulted in worldwide standards in technology such as the first 1/16 DIN (48x48mm) analog and digital controllers, followed by the first 1/32 DIN (24x48mm) digital controller. These innovations have firmly established CAL Controls as a leader in the Life Sciences and Laboratory market segments.

Since then the CAL product brand has joined the PMA, Partlow  and West  product brands to create West Control Solutions. 

The CAL product range features single loop, multi-loop and limit controllers.

CAL focus on providing valued temperature and process control expertise, global presence and support, a wider range of products and the power to innovate.