SERIES 3520
Trace Oxygen Analyzer
Product shown with optional ow meter and pressure regulator
FEATURES BENEFITS
State-of-the-Art Sensor Technology High Precision Measurements
Light Weight/Compact Design Easy to Carry and Transport
Rapid Speed of Response Senses Oxygen Changes in Seconds
Built-in NICAD Batteries Provides Hours of Continuous Operation
Uses Standard NICAD’s Replacement Batteries Found World-Wide
Minimum Maintenance Low Cost of Ownership
Product Description
The Series 3520 Trace Oxygen Analyzer is a portable, battery oper-
ated trace oxygen analyzer designed for industrial and commercial
applications where accurate and reliable spot trace oxygen measurements are needed. The Series 3520 Portable Oxygen Analyzer
features Alpha Omega Instruments long life ambient temperature
electrochemical sensor. The enclosure is made from durable polycarbonate and is rated NEMA 1 for general purpose service. The
instrument is powered from rechargeable NICAD batteries that are
mounted internal to the analyzer. Recharging of the batteries is
accomplished using a built-in battery charger with a universal AC
adapter. Single measurement ranges are available from 0-10 PPM
to 0-20,000 PPM with values displayed on a front panel liquid crys-
tal display (LCD). Options include pressure regulators, ow meters,
in-line lters, pumps, and block & bleed by-pass sampling systems.
High Performance Trace Oxygen Sensor
The Series 3500 and Series 3510 Trace Oxygen Transmitters
feature Alpha Omega Instrument’s long-life ambient temperature
electrochemical sensor that has a functional life of up to three times
that of most “fuel cell” type sensors. The enhanced mechanical design of the sensor ensures longer life, and virtually eliminates
Specications
PERFORMANCE
Measurement Ranges (parts per million)
0-10, 0-50, 0-100, 0-500, 0-1,000, 0-5,000, 0-10,000, and 0-20,000
Accuracy1: + 1% of full scale.
Linearity: + 1% of full scale.
Response Time: 90% of full scale response in less than
10 seconds (typical). The response time for
ranges of 0-50 PPM or less depend to a
great extent on the design of the sample
delivery system including the materials
used.
leakage of caustic electrolyte, a nagging (and expensive) problem
associated with sensors that require periodic electrolyte maintenance. And, because the sensor is sealed, it is not position sensitive. In addition, unlike some electrochemical sensors. Alpha Omega Instruments readings from the Series 3500 and Series 3510 do
not require manual adjustment based on changes in the molecular
weights of the sample gas i.e. helium, hydrogen, etc. a major advantage for continuous measuring applications. The output from
the sensor is both linear and temperature compensated to provide
optimum performance.
Now Featured a CO2 Resistant Sensor
A nemesis for many conventional “fuel cell” type trace oxygen
sensors are their inability to measure oxygen in gases containing
carbon dioxide. Carbon dioxide reacts with potassium hydroxide
electrolyte to form carbonic acid and in short time destroys the sensor. Not anymore. Alpha Omega Instruments offers an optional CO2
tolerant trace oxygen sensor with proprietary electrolyte. The CO2
tolerant sensor is capable of providing accurate oxygen readings
in gases containing up to 100% CO2 without shortening the life of
the sensor.
Input Power: Powered from eight AA
Rechargeable NICAD batteries with built-in
universal AC battery charger.
Analog Output: No analog output.
SAMPLE GAS CHARACTERISTICS
Sample Flow Rate: 1.0 to 2.0 standard cubic feet per hour
(SCFH). 0.5 to 1.0 liters/ minute (LPM).
Sample Gas Temperature: 40° to 104° F (5° to 40° C)
Sample Gas Pressure Limits: 0.1 to 1.5 psig (0.007 to 0.1 kg/cm2).
Sensor Type: Long-life Ambient Temperature Electro-
chemical Sensor (Optional CO2
Resistant Sensor Available).
Temperature Compensation: Standard.
Operating Temperature 40° to 104° F (5° to 40° C)
Range: <40° F (5° C) use heated sensor enclosure
>104° F (40° C) cooling of sample
gas/sensor required
Warranty: Two years electronics one year sensor.
ELECTRICAL
Display: 3-1/2 digit liquid crystal display
(4-1/2 digit for the 0-5,000, 0-10,000,
and 0-20,000 ppm range instruments.)
40 Albion Road, Suite 100, Lincoln, RI 02865
Tel: 401.333.8580, 800.262.5977 Fax: 401.333.5550
Email: salescontact@aoi-corp.com Web: aoi-corp.com
Alpha Omega Instruments Accepts VISA, Mastercard, and AMEX
Entrained Solids: <3 mg/ft³: no in-line lter required
>3 mg/ft³: in-line lter is required
Hydrocarbon Mist: <0.7 mg/ft³: no in-line lter required
>0.7 mg/ft³: in-line lter is required
CONSTRUCTION
Enclosure: Polycarbonate rated NEMA 1.
Dimensions: 6.5 inches (165.1 mm) height
6.5 inches (165.1 mm) width
7.8 inches (196.9 mm) height
Note: All dimensions are without optional
equipment
Gas Connections: 1/4” stainless steel compression ttings.
¹ Stated at constant temperature and constant pressure.
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