The transducer is a device that converts the mechanical motion of a spinning turbine into an electronic signal that is read by the fuel computer. The magnetic pick-up assembly detects the spinning turbine and counts the revolutions. This produces a series of pulses that is transmitted to the fuel computer. The computer uses the pulse frequency to calculate the fuel flow over time. The Shadin Avionics Company Incorporated-designed fuel flow transducer can be used in conjunction with all of our fuel totalizer units and fuel/airdata computers.
Shadin Avionics offers two types of fuel flow transducers that cover almost all General aviation and warbird aircraft.
Tangential flow transducers -- designed for reciprocating engineswith low system pressure (up to 200psi) and fuel flow rates (up to 45gph). They require a stainless steel flame shield, sleeve, canister or box.
Axial flow transducers -- designed for turbine and large radial engineswith high system pressure (up to 2000psi) and fuel flow (up to 450gph) applications. These transducers are made of stainless steel and meet all FAA requirements for installation in the engine compartment without additional heat or flame shielding. These transducers have excellent linearity and immunity from viscosity variation due to fuel temperature variation and low locked rotor pressure drop.
All hardware used in these assemblies, as well as the bracket to support them, is approved by the FAA under the PMA system.