Sierra Instruments 840H-4-OV1-SK2-D-V4-S4-MP Mass Flow Controller

The Sierra Instruments 840H-4-OV1-SK2-D-V4-S4-MP Mass Flow Controller is a SideTrak 840 high‑flow mass flow controller designed to precisely regulate the rate of gas flow in laboratory and process environments, enabling closed‑loop control through a 4–20 mA analog output (V4) and a complementary 4–20 mA input/command (S4) that can be integrated with standard industrial controllers and data acquisition systems. This configuration specifies Viton elastomer seals (OV1) and Kalrez seats (SK2), together with a D‑type 15‑pin electronic connector (D) for robust signaling and power connections, and carries the MP designation indicating calibration for medium pressure in the 40 to 100 psig range, which supports stable gas delivery under mid‑range pressures across multiple gases. As part of Sierra’s SideTrak family, the 840H‑4‑OV1‑SK2‑D‑V4‑S4‑MP is designed to meet the needs of demanding gas flow control tasks in both research and industrial settings, offering precise, repeatable performance within a compact footprint suitable for integration into existing process lines.