In-cab scales...

You need an air suspension load gauge. It is plumbed in to the airbag lines. There are plenty of companies that will sell you a gauge or a "kit", which most likely is just a roll of 1/4" plastic airline, some fittings and the gauge itself. My pete 379 has one from the factory, mounted nicely in the dash. Who are you working for in W. Mass? We are out of the Albany, NY area but we run mass a few times a week.

 

It is just in PSI. You may have to weigh on a scale to get a baseline correspondence between PSI/lbs. Mine reads 65psi when I am at 34k lbs on my drives. Pete Air Trac suspension

 

Right Weight makes a scale gauge with weight in pounds. It's adjustable. Get a max load, scale it, adjust gauge.

 

We have them on a couple trailers. They work good.

 

How accurate are Right Weight (http://www.rwls.com/) scales in real-life use? I see on their website that they are accurate to 300#'s. Not having used in-cab scales, is that good, bad, normal?

My concern is that if you're right at GVW, a 300# error, on multiple axles, is going to cost you...

 

I have one on my drives. I use it to balance weigh. If I'm really close to max I still use a CAT scale.

 

Have two right weigh guages in truck just tee it of my suspension gauge I ran one for my trailer which I put in cab also ran line all the way up from trailer bags and used a air coupler to disconnect when switching trailers. Weigh it with all axles down at max weight and it will be real close. Used it on both my spread flat and my closed tadem reefer was great with reefer sliding and watching weight from in cab. Right weight isn't that expensive thinking it was right around 225 for both if rember right been awhile. Used a electronic one on a Triaxle trailer hard to get set right when first using it when trailer was new would never get that one again.