The current Models HFM Mass Flow meters and HFC Mass Flow Controllers represent the culmination of more than 50 years' experience in manufacturing quality mass flow instruments. The basic design incorporates removable/replaceable components to provide users a low cost of ownership, maximum flexibility and reduced downtime. The heart of the system is a replaceable sensor which virtually eliminates long downtimes due to clogging, the most common cause of failure in the industry.
The modular design also offers adjustable range capabilities, in-line filtration, and replaceable electronics to allow users maximum flexibility in adjusting their system for changing requirements. Current designs can accommodate flow rates from 5 sccm to 15,000 slm, with fast response and zero overshoot electronics. Other mass flow instruments include meters and controllers for specific applications, such as low pressure drop, high capacity flow, high temperature, high pressure and hermetically sealed systems. These instruments are an asset to any industry requiring accurate gas measurement and/or control.
Primary industries include R&D process flow, vapor deposition, leak testing, gas blending, pollution monitoring, medical research, gas chromatography and semiconductor support processes. Recently, new all metal-seal 300 Series Metaline(r) mass flow meters and mass flow controllers have been introduced both in analog and digital versions. They are designed to accurately measure mass flow without corrections or compensations for gas pressure and temperature. These are highly accurate flow instruments which approach a 0.5% of reading accuracy (digital instruments) level. These Hastings mass flow instruments do not require periodic maintenance under normal operating conditions with clean gases. This product line features settling times less than 0.55 seconds.
The latest product line developed by Teledyne Hastings Instruments is the digital version of the high capacity mass flow instruments. These new digital instruments allow measurement and/or control up to 10,000 slm. The new line complements the existing lower flow Digital Metaline (5 sccm to 30 slm). The two product lines, Digital Metaline and the new high capacity digital mass flow instruments, offer flow meters and controllers from 5 sccm to 10,000 slm, with accuracy better than ±0.5% of reading. The lower flow Digital Metaline units have all-metal seals. A 4µ-inch Ra finish is available for flow rates up to 10 slm. Multiple gas calibrations and stored gas conversion factors are key features that set these instruments apart from the analog versions.
Both the Digital Metaline and the high-capacity digital mass flow instruments feature flexible operation with ±12, ±15 or 24 VDC power supply and transparent operation in analog or digital modes. All digital units are available with RS232 or RS485 interface with baud rates up to 19.2 kbaud. In addition, the instruments offer convenient self-diagnostics including warnings and alarms for flow, sensor, and valve status.

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