Bathroom fan timer

I would like to be able switch my bathroom extractor fan on and for it to automatically shut off at a set time. i.e. 2 to 15 mins. or so. My fan is switched on and off by a double pole pull switch which operates the fan only and not the light.

Do you have such a module that will connect to my circuit and will be able to carry out this function. I want it to control the fan only and not the light.

The VM154 module shown on your websit controls both the fan and light.

Could you tell me if this module would function without the light connected i.e. when switched on will operate the fan and automatically shut off at a set time @ 7 or 15 minutes