This heavy duty analog timer is a professional’s top choice because it will plug inside a transformer due to its high heat tolerance.  The Paige Electric TN111RM33 analog timer features heavy duty construction and built to operate in high heat situations.  It will plug into and operate a transformer.   Four pins come standard with the unit and therefore will turn the system on and off twice daily.

Use it to control landscape lighting and plug-in indoor lighting fixtures.  Paige Electric backs this with a one year warranty.

Need a timer with more functions?  Check out this Intermatic HB880R for its extensive functionality.