Furness
Rosenburg FRS4 Primary pressure standard.
Furness Control FRS 4 differential pressure standards
are used to perform calibrations in the ranges: 0.001
Pa to 3 kPa and 0.1 Pa to 40 kPa.
The FRS 4 is a proprietary standards manufactured by
Furness Controls and used as both a primary and transfer
standard by a number of the world's national laboratories.
Ranges 0.000 Pa (.000001 "H2O)
to 1000.000 Pa (4 "H2O).
Accuracy better than 0.005% reading.
Serial output for computer interface.
Operates as both a standard and a
working calibrator.
