To test I’ve connected the sensor directly to the CO2 regulator and turned off the gas after the regulator - see ball valve in photo in off position. Pressure slowly drops off from 20psi to 6psi over 13 hours. I’m 99% sure fittings and line are not the cause, it’s all been replaced. I would have expected the pressure to stay constant.
The feeling I have is the sensor is leaking, as if it was over pressured. This is the sort of behaviour id expect when exceeding the sensors maximum burst pressure of 232PSI according to the spec sheet however there is no way it has ever exceded 30PSI - the regulators maxs out at 60PSI and ive never had it anywhere near that.
I’d be very surprised if it’s leaking at the port. It’s a very tight fit. Had to warm up the plastic tube with hot water to get it to fit over. The tube is high pressure tubing rated to 217PSI.
As I said suspect the actual sensor is leaking. Open to thoughts on how to confirm this.
Ideally there should be a clamp like a single ear hose clamp on the port but I can not find one so small. Again open to suggestions.
AMS is one of the best pressure sensor out there. I will reach out to the manufacture and see if they can recommend something.
i see no issue with your setup.