The 400C series of force transducers is the next generation of our widely used 400A and B series. Advancements include new 2 and 4 channels versions of the amplifier for potential simultaneous measurements and new detachable cables for the sensor heads. This new series, like its B predecessor, has the sensitive signal processing circuitry in the transducer head itself. These new circuits allow any sensor head in the series to be plugged into the control electronics. Researchers can now purchase multiple heads to cover different force ranges, or as spares, and use them with a single controller. Other benefits of the new design are reduced noise, increased sensitivity, and greatly improved linearity.