Look at what the Recreational Vehicle industry uses for it's 'autolevel' jacks.
It can be as simple as set of 4 mercury switches (or one bubble switch with 5
leads [4 directions + common])

I'd recommend the Analog Devices ADXL202 two axis accelerometer with pulse
width modulated (duty cycle actually) outputs. Not cheap, but very linear and
easy to interface to a PIC.

Terence Gunderson wrote:
>
> Greetings and thanks in advance for any and all input:
>
> I need to have a platform automatically level itself.  I am looking for a suitable sensor to electronically sense when the platform is at level.  The output of the sensor will be input to a micro the micro will then adjust jack screws until it sees a level condition.
>
> Terry
>
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