Can Clack WS1 valve detect pinhole leaks? | Terry Love Plumbing Advice & Remodel DIY & Professional Forum

I have installed water softener with Clack WS1 valve. I saw WS1 has water flow rate detection, how accurate is the detection? If there is a pinhole leak, will it show a reading at least 0.1gpm? If it reads 0.0gpm, does that mean there is no leaks anywhere? Thanks.