The ST 32 and ST 32-01 are Torque and Tach signal conditioners for use with Aircraft control and display systems. They are dual function signal conditioners. They convert four channels of the sinusoidal output of Tach Generators and one channel of analog strain gauge pressure to a digital signal that can be used by aircraft display and/or control systems. The -01 version has reverse protection diodes on pins 1 and 20 that allow the ST 32-01 to be powered from independent power buses. It is recommended on new installations.