As far as the traditional wireline electrical gauges, you can contact Bob Laird, with GRC in Tulsa. They make a great gauge and quite reliable. Many of the GRC mechanical gauges ( clocks inside the gauge for measuring data)  from years back are still being run and recalibrated every so often - in other words low cost and reliable. He can also recommend some manufacturers if you want it to be on your ESP string.  Most of the esp vendors are just coming around and trying to get it right, no matter what they claim about their experience blah blah. If the esp companies boast, ask them how many 9's are in their reliability - ie 90%, 99 %, 99.9 percent, 99.99% percent,   or is it under 90% percent ....

ESP salesmen with experience know exactly what I am talking about ! Anyway, things take time sometimes to get it right. Hopefully not too much time though.

DavidPDavidson   email: dpdavidson@gmail.com   (966) 5 32650116