The Ametek Crystal 30 series is a portable wide range digital pressure calibrator available from Cameron Instruments. The series internal sensors provide 0.05% of reading accuracy. Accuracy includes effects of linearity, hysteresis, repeatability, temperature and stability for one year.
digital pressure calibrator
The FieldLab digital pressure calibrator from Ralston Instruments is an intrinsically safe digital pressure gauge that can perform in Class 1, Division 1, ATEX and IECEx Zone 0 locations.