San Jose, California- San Jose City Councilman Pete Constant [pictured] on Friday will host a public demonstration of technology he says can effectively filter Internet pornography without impeding legitimate research.

Constant, who has been pushing the city to install filtering technology at public libraries, has invited critics – including the San Jose director of the American Civil Liberties Union – to test the system, which is used in Arizona. The council next month is scheduled to decide whether to reconsider the city’s current policy.

Also invited is Library Director Jane Light, who gave a dim assessment of filtering technology in a report to the council earlier this month. She said various systems, including the one Constant advocates, allow objectionable material while blocking legitimate sites.

The public also is invited to test the technology. The demonstration will be from 3 to 5 p.m. Friday in Committee Room 120 at the City Hall wing, 200 E. Santa Clara St.