MODEL 3020M Explosion Proof Paramagnetic Oxygen Analyzer
Explosion Proof Paramagnetic Oxygen Analyzer MODEL 3020M
• Fully explosion proof enclosure
• Microprocessor based
• Exceptional performance, price value
• Advanced paramagnetic sensor
• Designed for petrochemical industry
Teledyne’s Model 3020M Paramagnetic Percent Oxygen Analyzer is a versatile, microprocessor based instrument specifically designed to detect oxygen in a variety of gases. The 3020M is a precise, cost effective instrument capable of measuring percent oxygen in as low as the 0-1% range. Drawing on the solid performance of Teledyne’s highly successful 3000 series control platform, the 3020M provides the user with a wide variety of features and options to satisfy virtually any application.
PRINCIPLE OF MEASUREMENT
The physical property distinguishing oxygen from other gases is its paramagnetism which is significantly greater than that of common gases. Consequently the molecules of oxygen are attracted by strong magnetic fields which can be used in detection. A paramagnetic sensor consists of two spheres arranged in the form of a dumbbell suspended in a symmetrical, nonuniform magnetic field. When the surrounding gas contains oxygen, the dumbbell spheres rotate out of the magnetic field by the relatively strong attraction of oxygen.
A light beam focused on a mirror attached to the dumbbell reflects asymmetrically onto two photo diodes resulting in a voltage shift. The voltage difference produces a current used to drive the dumbbells back to the original position. The current flow required to maintain the null position is directly proportional to the oxygen concentration and is shown linearly in volume percent oxygen in the display. Properly maintained paramagnetic sensors last for years with little or no attention making them ideal for critical measurements in the low percent range.
The 3020M offers three dynamic, user-configurable ranges plus autoranging, and can be calibrated in any range. The instrument is linear on all three ranges, eliminating the need to recalibrate while switching between ranges. The analyzer comes standard with an isolated 4- 20 mADC output for oxygen concentration and range identification. Additionally, a bi-directional RS-232C serial communication interface provides for remote monitoring and control of span and zero functions. Teledyne provides auto-calibration capabilities as a standard feature in the 3000 series platform.
This instrument is designed specifically for the detection of percent oxygen in petrochemical applications for process control, quality assurance, and safety related purposes.
Typical petrochemical plants requiring the 3020M are:
• Ethyl Benzene / Styrene Monomer (EB / SM)
• Pure Terephthalic Acid (PTA) • Caprolactum
• Phenol / Cumene
• Ethylene Oxide / Ethylene Glycol (EO / EG)
• Methyl Methacrylate (MMA)
• Ammonia / Urea Fertilizer
• Refinery FCC Unit and flare gas applications
• Marine Vapor Recovery (MVR)
• Linearity of analysis across three user-selectable ranges
• Autoranging to follow process upsets
• Auto-calibration electronics standard
• No purge gas requirements