High Accuracy Flowmeters and Controllers

(from 0-2500slpm to 0-10,000slpm)

HFM-306 / HFC-308

Features

• Range — 2500-10,000 slm (Air Equivalent)
• ±3.0% of Full-Scale Accuracy
• Rapid Settling Times: HFM-306<= 0.4 seconds, HFC-308<= 3.0 seconds
• Operating Pressures to 500 PSI
• NIST or UKAS Traceable Calibration
• Class 1, Div. 2 Enclosures Available

Applications

• Gas Blending
• Petrochemical
• R&D and Process Flows
• Fuel Cell

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.