Dual inputs A & B have separate scaling K-factors. The totalizer can be programmed for “A” subtract “B”, “A” add “B” or A & B as separate totalizers, with display and control of the “net” total and rate of “A”. The MINITROL is also available in 4 other versions. MC2: a two preset totalizer with scaling, MR2: a high/low alarm ratemeter with scaling; The “MC”: a totalizing counter only, and the “MR”: a rate meter display only.