Chlorine gas flow meter

The Fluid Components International GF90 Gas Flow Meter provides accurate, reliable measurement in chlorinated water disinfection systems.

The chlorine gas can be added to water in precise and accurate concentration levels using the meter to ensure high quality and safe, potable water.

The automation system continuously monitors the quality of incoming water from its supply network to determine the correct amount of chlorine necessary to maintain the required water purity. The FCI GF90 mass gas flow meter is inserted in the chlorine gas process piping and its 4-20 mA output wired to the input/output (I/O) modules in the automation system. The automation system then continuously measures and controls the amount of chlorine to be dispensed for optimum water purity.

The meter alleviates several problems associated with metering chlorine gas. Chlorine gas is wet, corrosive and flow rates can be extremely low, which makes accurate measurement difficult. With its solid-state, precision flow sensor design, the GF90 reduces the problem of plugging that can occur with small-bore orifice design sensors such as differential pressure devices. As a solid-state meter, it can measure extremely low flow rates and it is a simple process to construct the sensor of materials that make it impervious to this highly corrosive, wet chlorine gas. Materials of construction for wetted parts include Hastelloy-C as an option.

The meter’s constant power technology results in a stable output with high accuracy. 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 °C 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 °C and pressure applications to 69 bar (g).