Tel Tek gauges

I put an Isopro digtal in my KW, it works fast but when i talk on the CB with power on it reads way off. i called Tel Tek he said they have never had that problem with there's. i havn't changed any other's yet.

 

After becoming an O/O again, I'm now on my third truck, and have used Tel Tek in all three. Mostly the suspension pressure, and the air temperature gauges. I installed a pyro in my present truck, fixing to order the air temperature gauge also. Never had any kind of accuracy problem; matter of fact, the only problem I ever had with a Tel Tek gauge was in my '01 W900, shortly after installing an air temperature gauge in the over head "console", the outside air reading began acting up. After dropping the console to remove the gauge and send it back, I found I had pinched the sending unit wire when I installed it, cutting the insulation and shorting it out.....duhhh.

They are a "drop-in" for KWs, also come with an extra bracket of some kind, but I've never had to use it.
At night, the digital readout is brighter than I'd like it, but I run with my gauge lights dimmed considerably, just my preference.

 

So just how accurate are the suspension pressure gauges as I'm thinking about buying this..