Control HVAC air pressure

[steve v <svorres@xxxxxxxx>]

Hi I have an Motorola air pressure sensor.
http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&storeId=10001&catalogId=10001&productId=12263

I would like to allow it to regulate the air pressure in my house ducts
and have it control my blower motor.

Has any one seen a schematic that could be used to interface a Triac to
an air pressure sensor ?

The motorola sensors are kind of expensive, doe anyone know of a cheaper
solution ?  than this one

thanks