Moisture in chlorine analyser

June 2006 Analytical Instrumentation & Environmental Monitoring

Chlorine manufacturers know the importance of measuring moisture in chlorine. Chlorine is extracted by the electrolysis of brine, and so this chlorine is naturally wet when produced and must be dried before compression and liquefaction. When dried chlorine comes in contact with water, hydrochloric acid is formed, causing corrosion to proceed rapidly in compressors and plant piping, which must be protected. The Ametek Model 304 Moisture in Chlorine Analyser offers a solution to the problem of making an accurate, repeatable and reliable measurement of moisture in dried chlorine gas.

Ametek's Model 304MCA consists of two polyester NEMA 4X enclosures. One enclosure houses the sample system and sensor, and the other contains the electronic controller/display. This separation protects the electronics, preventing damage should a leak occur in the sample system. Being mounted in a NEMA 4X enclosure permits the sample system to be installed close to the sample tap for fast and accurate measurement.

The instrument has a 0 to 2000 ppmv range with 1,0 ppmv sensitivity and an accuracy of 2 ppm or ±20% of the display reading, whichever is greater. Operating on 100 to 130 V a.c. or 200 to 260 V a.c. the Model 304MCA is suitable for use in an ambient temperature range from 0 to 40°C. It complies with UL/CSA and all relevant European directives.

The Model 304MCA's sample-wetted materials are P205, Monel, Teflon, fluorocarbon resin, Kynar, glass, platinum and Viton, making the analyser resistant to attack by chlorine, resulting in high reliability and minimal maintenance.

A 4 to 20 mA output compatible with a 625 (maximum load transmits the moisture level to a recorder or control centre. A built-in bypass flowmeter increases total sample flow to keep response time to a minimum. The 304MCA is equipped with a digital moisture indicating meter, all solid state electronics, a rugged plug-in moisture cell, particulate filter, easily replaceable pressure regulator and CI2 calibrated flowmeter.

For more information contact Noel Bauchop, OEN Enterprises, 011 675 4447, [email protected], www.oenenterprises.co.za

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