Sterling Series Controllers offer 8, 12, 18, 24, 30, & 36 stations models.
Electrical Specifications
Maximum of three 4-watt solenoids per station. Standard 50 VA transformer allows up to five 4-watt solenoids to operate simultaneously; or, for solenoids with a current draw at or below .25 amps, up to 6 solenoids can operate simultaneously.