Contact Macromatic–Diversified unit has locking potentiometer vs. standard potentiometer on Macromatic unit & has blade (spade base) socket; to use Macromatic equivalent – the socket must be changed to an 8 pin octal base and some rewiring must be done. Diversified unit has time range of 1-100 seconds; Macromatic unit is programmable with 8 ranges covering 0.1 seconds-30 minutes