Aalborg Instruments
Orangeburg, NY 10962
May 29, 2008 Model XFM can be programmed remotely, stores calibration data for 1-10 gases and conversion factors for up to 32 gases, and has accuracy of ±1% of FS at calibration temperature and pressure. Automatic sensor zero offset adjustment can be activated locally (maintenance push button) or remotely (via digital interface). It features digital interface RS485 and RS232, programmable totalizer, high/low flow alarm limits, self-diagnostic tests, and 23 Volumetric Flow/Engineering Units.

Brooks Instrument, A Div. Of Emerson Process Management
Hatfield, PA 19440
Jan 23, 2007 Brooks® Model 4800 Series Mass Flow Meters and Controllers feature Micro Electro Mechanical System sensor to deliver response to changes in gas flow rate. Allowing gas to flow directly across sensor, compact, modular instruments provide measurement and control of air, N2, O2, Ar, He, H2, CO2, CO, N2O, CH4, CH3H6, and C3H8. Model 4850 mass flow controller uses PID algorithm to optimize control valve response, and match actual mass flow to changes in setpoint.

Emerson Process Management, Rosemount Div.
Chanhassen, MN 55317
Apr 17, 2006 Rosemount® 3095 MultiVariable(TM) Transmitter delivers 4 measurements from 1 device, including pressure, differential pressure, temperature, and fully compensated mass flow. Mass flow function block applies measured pressure and temperature to perform real-time flow compensation for all flow variables that could contribute to flow errors, including density, discharge coefficient, gas expansion factor, bore of differential producer, and velocity approach.

Cincinnati Test Systems Inc.
Village Of Cleves, OH 45002
Oct 22, 2004 Designed for mass flow leak detection, Sentinel F-21 utilizes solid-state mass flow sensor to respond to flow changes. Dual tandem regulators ensure constant pressure source for reliable readings, and 32-point calibration lends to accuracy of flow measurement. Other offerings include dual pressure testing capability and self-test feature. Unit can store up to 1,000 test results for output to printer or computer.

Sierra Instruments, Inc.
Monterey, CA 93940
Oct 09, 2002 HART-compliant Innova-Mass® multivariable vortex mass flow meter provides outputs for mass and volumetric flow rate, temperature, pressure, and fluid density. Diagnostics module includes fault log and forcing function. Available in ½ to 8 in. sizes, Innova-Mass is also available as insertion-type meter with flanged packing-gland or compression-fitting process connections. It uses 3 primary sensing elements to measure gases, liquids, and steam.