Analog ultrasonic sensors for Arduino robot platform

Hi

I have arduino robot platform and I want to connect 8 ultrasonic sensors to TK0-TK7 pins. As I know and also tryed Ping))) and seeduino SEN136B5B sensors doesn't fit because they gives digital pulse output. Could anyone reccomend me good analog ultrasonic distance sensors that could be attached to TK0-TK7 ports?

Tnaks

Have you tried Google? I see a bunch of results when I do a basic search https://www.google.ca/search?q=analog+ultrasonic+distance+sensor

For hobby robotics most people use IR sensors for analog distance sensing, as they are (typically) more cost effective (example): http://www.pololu.com/product/136

If you provide more details about your application, you may get better feedback.