OMEGA FMA-1609A Offers

The FMA-1600A Series mass and volumetric flow meters use the principle of differential pressure within a laminar flow field to determine the mass flow rate. A laminar flow element (LFE) inside the meter forces the gas into laminar (streamlined) flow. Inside this region, the Poiseuille equation dictates that the volumetric flow rate be linearly related to the pressure drop.

A differential pressure sensor is used to measure the pressure drop along a fixed distance of the LFE. This, along with the viscosity of the gas, is used to accurately determine the volumetric flow rate. Separate absolute temperature and pressure sensors are incorporated and correct the volumetric flow rate to a set of standard conditions.

This standardized flow rate is commonly called the mass flow rate and is reported in units such as standard cubic feet per minute (SCFM) or standard liters per minute (SLM).

The gas select feature can be adjusted from the front keypad or via RS232 communications. Volumetric flow, mass flow, absolute pressure, and temperature can all be viewed or recorded through the RS232 connection.

It is also possible to multi-drop up to 26 units on the same serial connection to a distance of 125' (38 m). These flow meters are available in a portable version ("-B" option), the battery charge will last up to 18 hours.

Features

• Up to 18 hour battery charge on portable "-B" models
• Ranges of 0 to 0.5 SCCM up to 0 to 3000 SLM
• Reports mass flow, volumetric flow, temperature, and pressure
• <10 ms response time—field adjustable
• 130+ gas calibrations including pure and mixed gases
• Pressure, temperature and volumetric or mass flow simultaneously displayed
• NIST 5-point certificate included
• No straight runs of pipe required
• No warm-up time
• Turndown ratio of 200:1 (0.5% maximum flow)
• RS232 standard
• Custom live gas blend programming
• Store up to 20 user defined gas blends

Applications

• Measuring mass flow of pure and mixed gases in bioreactor processes
• Monitoring carrier gas flow in chromatography systems
• Monitoring shielding gas flow in welding operations
• Measuring gas flow to laser cutting and processing equipment
• Measuring stack and flue gas flow for emissions monitoring