ptc electronics inc has been in business since 1978, specializing in pressure, force and load measurement. *since 1985 ptc has been the north american distributor for scaime load cells, tank weighing kits and electronic accessories. *ptc is also the master distributor of ast american sensor technology precision pressure transducers and transmitters. also distributed are digital displays by london electronics ltd.*ptc manufacturers a variety of digital pressure gages with accuracies of 0.1% and 0.05%. loop powered process indicators are also available.*pressure calibration is available up to 5000 psig.