Trailer tire pressure systems

[Lowlysubaruguy]

I’m looking at tire pressure systems. Seems none of my tire suppliers carry them. So I’m forced to go with something off the web. I’d like internal sensors not a big fan of screwing one onto a valve stem would like to be able to get replacement sensors or be able to replace batteries. And I need six of them which complicates this a little. Any of you have input on them.

 

[rescuer]

I have the screw on type. easy to change batteries, free batteries once a year. I use Tire minder. I have had them for 2 years and no problems. they have an o ring where the battery cap screws on. I would not tow without them.