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Hastings Instruments products represent over 50 years of experience in
the design and manufacture of mass flow products. The 300 Series is a
culmination of this experience with patented technologies that make these
the finest flowmeters and controllers available today.
The Hastings Mass Flow 300 Series products are designed to accurately
measure mass flow without corrections or compensations for gas pressure
and temperature. They are accurate to better than ±1.0% of full scale.
Hastings mass flow instruments do not require any periodic maintenance
under normal operating conditions with clean gases. No damage will occur
from the use of moderate overpressures (~500 psi) or overflows. Instruments
are normally calibrated with the appropriate standard calibration gas
(air), then a correction factor is used to adjust the output for the intended
gas. Special calibrations for other gases, such as oxygen, helium and
argon, are available upon special order.
For applications where combustible gases are metered, this model is available
in a NEMA 4 housing. Integral seals make for safe handling of gases, including
helium and hydrogen, where separate enclosures were once required. Product
bulletin PB156, which will be published early 2001, contains these details.
The 300 Series products contain a number
of features that set them apart from other
available instruments: (1) They are
inherently linear; no linearisation circuitry is
employed. Should recalibration in the field
be desired (a calibration standard is
required), the customer needs to simply set
the zero and span points. (2) The output
signal is linear for very large overflows and
will not come back on scale when a flow an
order of magnitude over the full scale flow
rate is measured. (3)Ê The instrument
incorporates a removable/replaceable
sensor module. (4)Ê The unit has very fast
settling times.
For further information please contact
us or download the PDF Data sheet download
(111kB)
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