Analog Humidity and Temp Sensor Shielding

Hello,

I'm setting up a system with an Uno R3 and 3 RH/T sensors. I have used CAT7 cable to wire up the sensors.

My power supply is a 12VDC @ 1A from a router with no earth ground.

Where do I bring the foil/braid shield? Common ground on the Arduino?

Thank you,
Beefey

Where do I bring the foil/braid shield? Common ground on the Arduino?

In this case I would not connect it. Don't expect very accurate readings if the cable is longer than about 2-3 meters. Try to bring the Arduino as near as possible to the sensors.

So you'd go unshielded totally? I think I'm going to try tying it into earth ground through a separate leg.

So you'd go unshielded totally?

It's not unshielded, the shield is just not earthed. If you connect the shield to the Arduino's GND you can expect bigger inaccuracies than without a shield connection. If you have the possibility to earth separately, do it. You didn't tell us that you can do that.