Ft transducer converts frequency of ac voltage to a linearly proportional dc signal, irrespecitve of wide variation in the load. Accurate and reliable output signals are suitable for telemetering, data logging as well as central monitoring systems. Model ff features: small size and light w eight; flame retardant, self extinguishing din rail/wall mounting casing; a wide choice for auxiliary supply of ac 110 v, 220 v, dc 24, 48 v to suit any system; input range of 110/220 v, 45-55 hz, 55-65 hz, 45-65 hz or any other; completely isolated inputs and outputs; excellent linearity; low ripple in output signal; wide option for outputs like 0- 1 v, 0-5 v, 0-10 v, 1-5 v, 0-1 ma, 0-5 ma, 0- 10 ma, 0-20 ma, 2-10 ma and 4-20 ma; and dual output is available.