SERIES 3500
and 3510
Trace Oxygen Transmitter
Product shown with optional ow meter, solenoid valves, pump and particulate lter
FEATURES BENEFITS
Long Life Trace Oxygen Sensor Provides up to three times the functional life of most “fuel cell” type sensors.
Reliability is dramatically increased while maintenance costs are reduced.
Sealed Sensor Eliminates handling potassium hydroxide (caustic), a hazardous material or
having to frequently “recharge” the electrolyte.
CO2 Resistant Sensor Optional CO2 resistant sensor is designed to operate with sample gases
containing up to 100% CO2. Conventional “fuel cell” type sensors using
potassium hydroxide (KOH) electrolyte can be poisoned from CO2.
Economically priced Affords savings of up to 30% and more over other manufacturers trace oxygen
transmitters.
Wide Measurement Ranges Measure from under 1 PPM to as high as 20,000 PPM oxygen.
Factory Calibration Factory calibration included at no additional charge. Upon request, NIST
calibrationcerticatesavailable.
NEMA4Enclosure Greaterinstallationexibilitywithadustandwaterproofenclosure.
Product Description
The Series 3500 Trace Oxygen Transmitter is a true loop powered
(14-32 VDC) trace oxygen transmitter designed to provide accurate and dependable trace oxygen measurements in a variety of
background gases. Measurement ranges available are from 0-10
PPM to 0-20,000 PPM. The Series 3500 enclosure is made from
durable polycarbonate, and is rated for NEMA 4 (IP 66) service
(may change with the addition of certain optional equipment). A
4-20 mADC output is provided that can be used with a data logger,
recorder, PLC, DCS, etc. Options include pressure regulators, ow
meters, sample lters, and explosion proof (NEMA 7) housings
The Series 3510 Trace Oxygen Transmitter is the AC powered
(115/230 VAC, 50-60 Hz) counterpart to the Series 3500 and is
recommended when AC power is available or preferred. In addition
to the optional equipment mentioned above, the Series 3510 can
be equipped with sample pumps, sensor heaters, solenoid valves,
loss of sample ow signal indication. A 4-20 mADC analog output
is provided.
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.
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.
The enhanced mechanical design of the sensor ensures longer life,
and virtually eliminates 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 CO
tolerant trace oxygen sensor with proprietary electrolyte. The CO
tolerant sensor is capable of providing accurate oxygen readings
in gases containing up to 100% CO2 without shortening the life of
the sensor.
Analog Output: 4-20 mADC with a loop resistance of 600 ohms @ 24
VDC (consult factory for other resistance values).
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 40° to 104° F (5° to 40° C)
Temperature:
Sample Gas 0.1 to 1.5 psig (0.007 to 0.1 kg/cm2).
Pressure Limits:
2
2
Sensor Type: Long-life Ambient Temperature Electrochemical
Sensor (Optional CO2 Resistant Sensor Available).
Temperature Standard.
Compensation:
Operating 40° to 104° F (5° to 40° C)
Temperature 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
Series 3500 Loop Powered Trace Input power 14-32 VDC
Oxygen Transmitter:
Series 3510 Trace Oxygen Transmitter: Input power 115/230 VAC, 50-60
Hz, or 24 VDC
APPLICATIONS
Heat Treating Vessel Blanketing
Air Separation Petrochemical Processing
Glove Boxes Pharmaceutical Manufacturing
Inert Gas Generators Anaerobic Chambers
Chemical Manufacturing Food Processing
Process Dryers Beverage Processing
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 4X (IP66) without
optional equipment.
Dimensions 5.5 in (139.9 mm) height.
8.8 in (223.5 mm) width.
3.4 in (86.4 mm) deep.
Note: All dimensions are without optional equipment
Gas Connections: 1/4” stainless steel compression ttings.
1
Stated at constant temperature and pressure
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
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