Sierra Instruments 902C-PM-PS Dual-Channel Side-Trak Flow Controller

The Sierra Instruments 902C-PM-PS Dual-Channel Side-Trak Flow Controller is a dual-channel mass flow controller that provides independent control of gas flow on two channels from a single instrument. The unit is part of Sierra’s Side-Trak family and includes valve purge, monitor, and off functions accessible from the back panel to support quick startup and status checks. The exact variant is cataloged with the internal reference DRO R30998, confirming the 902C-PM-PS dual-channel Side-Trak description. The designation 902C-PM-PS identifies a dual-channel, Power/Readout System version of the Side-Trak controller, designed for inline flow control of process gases. Side-Trak products feature direct mass flow measurement and a robust, cleanable flow path to simplify maintenance and ensure reliable operation in gas-flow applications. This dual-channel arrangement enables independent control of two gas streams or two process paths within a single instrument, improving integration and control flexibility in laboratory and process environments. It is part of Sierra’s 900-series electronics lineage, aligning with the broader Side-Trak portfolio for precise gas flow control. Distributors and refurbishers continue to reference the 902C-PM-PS variant with DRO R30998 in catalog listings.