=countif(sheet1!a:a,"duct temperature sensor")

Maybe????

Redwan wrote:

It is one column contains set of formula results for the different type of
sensors used in a control system €“ Duct Temperature sensor, Humidity Sensor,
etc-
I want to count (SUM) the number of the occurrences of each item in the
column to use in another worksheet ( Pricing work Sheet)

--

Dave Peterson