http://www.vehiclelight.com/airalert.html (http://www.vehiclelight.com/airalert.html)
I bought some LED clearance lights from these guys so i get an email from them. I have no ties to them.
I thought I 'd pass this info along and see what the opinions are.
It can be used from 20 to 120 psi but it can at best detect an 8 psi drop. So a 24 psi tire is down to 16 psi before it notices and it has to defeat the stem valve to work so you are now depending on its seal to keep the air in the tire. I think I will pass and continue to use a pressure gauge during the pre-flight walk around.
I have seen various of stem mounted "local" tire pressure sensors. My definition of "local" is that they do not transmit a signal to a receiver at the driver area ("active system e.g. Doran, Pressure Pro, etc).
When I talk to folks who have tried them at our booth, most are not happy with them and have decided to move up to an active system.
Having said that, I have not seen these sensors and they are very interesting. I like the self-calibrating feature. They will not tell you if you develop a problem while driving, but they look like they will allow you to quickly check pressures at each "comfort stop".
Keep us posted on your experience.
Jim
The duals were a pain to check the air in so I bought a quality set of extenders, I ended up with an inner flat cause the extender leaked. I threw the extenders out!!!
I purchased a set of "local" sensors, I thought what a great idea. I was stopped at a light and a lady pulled up beside me and said my rear tire was low on air. I pulled into a station to check it and when I went to pull the sensor off I notice air leaking out of the sensor. I threw the sensors out!!!
Maybe it is just me ??? Jim
I had the extenders on my 1-ton and nothing but problems with them leaking. Threw them out too. Now I have a specially configured pressure guage that slides in through the outside wheel to reach the inside with just the right angle on it for ease. A friend of mine took a brass guage and cut and brazed it special for me. It also works great for airing up the brake system because the valve is pointed in an awkward direction when looking in the engine compartment. Maybe I should see if he wants to patent and sell them LOL. Goodluck with the pressure sensors, Will
My extenders nearly cost me an inner dual. The less crap hanging on the stem...the better. The monitoring system sold by RV Safty is the exception. I pine for those.
John
Same here with extenders, I tried three different types and none of them ever worked right.
Now I have two different shape gages but they don't agree on pressures??
Why is something so simple so complicated?