I'm not a plumber so I am not going to comment on the code aspects to this setup. It does look to be a rather unconventional setup. Is the shutoff between the meter and the filter easily accessible? Should a water leak emergency or maintenance be required with the sillcock, PRV or the filter, the water will need to be shutoff at the meter. Around here, that is not something the homeowner generally has access to because it requires a curb key to access the meter and co-located shutoff. I would expect that both the PRV and filter to be located after the in-house shutoff and the filter to be located after the PRV so that it is not subjected to the higher pressures. If you are worried about sediment, most if not all PRVs have a strainer built in. Also, why is measuring the incoming pressure important?