Hi There! I have stumbled across an article in a news letter that may have some interest seeing this topic was discussed some time ago. The DX-045 and DX-008 are dual axis polymer based electrolytic tilt sensors. These sensors provide economical and reliable two axis tilt solutions for applications where very good linearity, high resolution and superior symmetry are required. DX-008D DX-045D Range -20 to +20 -90 to +90 Resolution <3 arcsec typical <22 Repeatabil. <0.01 arcdeg typical <0.03 Linearity <1% @ 8 deg. <7% @ 70 deg. Response <20 msec. <20 msec. EZ-TILT-1000 The EZ-TILT-1000 is a dual axis conversion IC. this 18-pin DIP or SMD I.C. is capable of providing continuos inclination information for dual axis tilt sensors in a std. 8-bit RS232 format (19.200bps). An additional analog input on #17 is available for optional temperature or any other environmental input used for monitoring or correction of the output. Response time is 20 msec. For more information e-mail alan@eagle.co.za or have a look at http://www.eagle.co.za I have no interests in the above company, as I said I stumbled on this in a news letter. Zack