Sian Berry, the Green MP for Brighton Pavilion, criticised the technology as “incredibly intrusive” and called for greater debate about its use before it was rolled out more broadly.
Other campaign groups have raised concerns that the cameras may reinforce racial biases, as some artificial intelligence cannot distinguish between black and Asian faces.
Matthew Johnson, chief executive of campaign group Race on the Agenda, said: “It hasn’t been designed with black and brown communities in mind.
“It makes me feel more unsafe and less secure, and that my privacy rights can be breached at any point just going about my day.”
Sussex Police Det Ch Supt Carwyn Hughes said their technology held “no statistical risk” of racial or gender bias, adding it was “incredibly important” to the force to prevent any profiling.
Mr Hill said he was “confident it minimises any false alerts”.