Gas mass flowmeter

The GF90 gas mass flow meter from Fluid Components International is designed for gas measurement applications, such as chlorinated water disinfection systems. As a solid state meter, the GF90 is designed to measure extremely low flow rates, and it is constructed of materials that make it impervious to highly corrosive, wet chlorine gas. Materials of construction for wetted parts include Hastelloy C as an option.

The GF90 flowmeter claims a stable output with high accuracy of +1% of reading plus 0.5% of full scale, with repeatability of +0.5% of reading or better. The GF90 is designed to measure a wide range of air/gas flows, 0.08 to 487.7 NMPS (m/s at a normal temperature of 21.1 ºC and pressure of 1.013 bar absolute), with a turndown ratio up to 1000:1. It is available for service in a broad range of fluid temperature applications, from -73 to 454 ºC and pressure applications to 69 bar (g).

The GF90 flowmeter is designed for multi-gas or variable flow processes, and it includes a programmable transmitter that can store up to three gas calibration groups.

The GF90’s transmitter features dual alarm switch points with alarm relay outputs. It also offers two independent, field-programmable analog signal outputs of 4-20 mA, 0-10 VDC, 0-5 VDC, and/or 1-5 VDC, which can be assigned to any combination of flow or temperature. The switch points are user field-programmable to alarm at high, low or windowed settings and are assigned to both flow and temperature measurements.