Thermal mass flow controller SideTrak® 840

for gasstainless steelanalog

Direct monitoring of mass flow eliminates need for ancillary pressure and temperature sensing Patented straight sensor tube with access ports permits easy cleaning and reduces maintenance down-time Platinum sensor eliminates zero-drift and ensures long-term repeatability Fast-response control valve provides rapid response to set point changes and operates over a wide pressure differential range Primary standard calibration ensures starting point accuracy and NIST traceability Available with a wide variety of enclosures, process connections, input/ output options and control electronics CE Approved DESCRIPTION Sierra Instruments’ Side-Trak® Model 830 Mass Flow Meters and Model 840 Mass Flow Controllers are designed for precise measurement and control of air and process gases in ranges from 0 to 10 sccm up to 0 to 500 slpm. Because all wetted materials are 316 stainless steel, the device accommodates most clean gases, including corrosives. Proven by over 25 years of field installations, the Side-Trak product line is distinguished by its patented, cleanable, large-diameter sensor tube and the reliability and serviceability that this feature provides. Because a microscopic layer of contamination has a major effect on small diameter sensor tubes, many mass flow meters and controllers suffer, over time, from degradation of accuracy or repeatability. The Side-Trak sensor is not only larger in diameter than most other MFMs and MFCs, but it is mounted along the side of the flow body to provide access ports at either end. In the event of clogging or contamination, it can be cleaned with the 0.03-inch diameter cleaning rod available from Sierra.