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Meet Sierra's Analog MFM and MFC Products!

Our family of high performance analog mass flow meters (MFM's) and mass flow controllers (MFC's) has been in continuous production since 1984. Since that time, we have successfully delivered over 150,000 analog MFM’s and MFC’s to build an installed base in almost every country in the world. Our Side-Trak® Model 830 and Model 840 comprise our premium offering. Our Mass-Trak® Model 810S and Top-Trak® Model 820S are stainless steel versions of our economical nylon products. 

The customer base for our analog product line is very diverse, ranging from automotive to food & beverage to semiconductor.  Our customers have come to depend on the quality and reliability of our high performance analog MFM’s and MFC’s. For performance that you can depend on at a competitive price, take a closer look at our analog products.


See ALL of our MFM solutions.  Click to learn which meter may be best for your application.


See ALL of our MFC solutions.  Click to learn which meter may be best for your application.

Model 840 Side-Trak® Premium Mass Flow Controllers
An accurate and reliable stainless steel MFC with a wide flow range.  Accuracy of +/- 1% of full scale and flow ranges from 0-10 sccm to 0-5600 slpm.

Model 830 Side-Trak Premium Mass Flow Meters
An accurate and reliable stainless steel MFM with a wide flow range. Accuracy of +/- 1% of full scale and flow ranges from 0-10 sccm to 0-5600 slpm.

Model 822S & Model 824S Top-Trak® Mass Flow Meters
A value-priced, stainless steel MFM with available large tiltable LCD readout. Accuracy of +/- 1.5% of full scale (+/-1% of FS optional) and flow ranges from 0-10 sccm to 0-500 slpm.

Model 951 & 954 Digital Control/Readout and Power Supply Systems
The 950 Series includes a compact, single channel device and a deluxe, multi-channel device for operation of up to four mass flow instruments. The 950 Series is designed for use with the Sierra Model 830L, 830M, 840L and 840M instruments, but can be used on any brand of MFM or MFC.





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Analog Mass Flow Meters and Controllers