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Non Dispersive Infrared Method

The petrochemical, gas processing, and gas pipeline industry has always needed an accurate and dependable, low maintenance and cost-effective CO2 analyzer for quality and process control purposes. Analytical Systems International (ASI) has met these requirements with their proven microprocessor. This microprocessor provides continuous on-line analysis based on the specific non-dispersive infrared principle of operation. The process stream is analyzed for CO2 and is regulated to 10 PSI. Then a precision flow meter regulates the sample flow to approximately 1.5 SCFH. Next, the sample is introduced to the specific infrared detection element that provides an output proportional to the concentration of carbon dioxide. This signal is digitized and analyzed by the advanced microprocessor and related software resulting in a line 4-20 MA output, relay alarms, and RS232 is provided. The LCD display provides the current reading, previous reading, cycle time, any alarm conditions, procedure prompts (i.e., calibration procedure), and failure indicators (local and remote capability). The analyzer can also interact, communicate, and transmit information for other manufacture's instrumentation. Quality materials are selected for compatibility and are utilized throughout fabrication. Special attention is given to wetted parts that come in contact with the process stream and are selected to be non-reactive.

Accurate & Dependable Operation:

• Reduced Downstime
• Explosion Proof
• Auomated Calbration
• Low Maintenance Due to Simple & Limited Mechanical Parts
• RS 232/495 Serial Communications
• Infrared Sensor Life Over 5 Years

Microprocessor Accuracy:

• Continuous Analysis
• Multiple Stream Analysis
• External Equipment Transmission
• Push Button LCD Prompted
• Calibration Procedure
• RS-232/485 Communication
• LCD and Remote Fail Safe Alarm
• Historical Events and Date Reports
• Spike Rejection
• Automatic Zero
• 4-20 MA Output
• 3 Alarm Contacts
• Large LCD
• Noise Rejection