
SERIES 2500
and 2510
Percent Oxygen Transmitter
Product shown with optional ow meter, needle valve, and coalescing lter
FEATURES BENEFITS
Wide Number of Ranges Measure from <0.1% to 100% Oxygen
Exceptional Speed of Response Responds Instantaneously to Changes in Oxygen
Rugged and Versatile Construction NEMA 4 Housing Withstands Harsh Environments
Economically Priced Save Thousands of Dollars vs Other Methods
Extended Life Sensor Eliminates Frequent Sensor Replacement
Acid Gas Resistant Sensor Eliminates Sample Conditioning for Many Applications

Product Description
The Series 2500 Trace Oxygen Transmitter is a true loop
powered (14-32 VDC) percent oxygen transmitter designed
to provide accurate and dependable percent oxygen measurements in a variety of background gases. Measurement
ranges available are from 0-2% to 0-100%. The Series
2500 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) hous-
ings.
The Series 2510 Percent Oxygen Transmitter is the AC
powered (115/230 VAC, 50-60 Hz) counterpart to the Series
2500 and is recommended when AC power is available or
preferred.
In addition to the optional equipment mentioned above, the
Series 2510 can be equipped with sample pumps, sensor
heaters, solenoid valves, loss of sample ow signal indication. A 4-20 mADC analog output is provided.
The Series 2500 and Series 2510 Percent Oxygen Trans-
mitters feature an extended life oxygen sensor with EES
(enhanced electrolyte system). This sensor provides exceptional performance, accuracy, and stability. For applications
where carbon dioxide is present in the sample gas, the
EES retards passivation of the sensor anode by allowing
the products of oxidation to dissolve in the electrolyte. In
effect, the sensor is renewed continuously, resulting in an
increase in sensor life even if exposed to 100% carbon
dioxide. In addition, the enhanced mechanical design of the
sensor ensures longer life, and virtually eliminates leakage
of electrolyte, a nagging (and expensive) problem associ-
ated with sensors that require periodic electrolyte maintenance.
Specications
PERFORMANCE
Measurement Ranges in Percent
0-2, 0-5, 0-10, 0-25, 0-50, and 0-100
Accuracy¹: + 1% of full scale.
Linearity: + 1% of full scale.
Response Time: 90% of full scale in less than
20 seconds (typical).
Sensor Type: Long-life Electrochemical
Sensor.
Temperature Compensation: Standard.
Operating Temperature Range: 40° to 104°F (5° to 40°C)
Warranty: Two years for the electronics
and one year for the sensor.
ELECTRICAL
Series 2500 Loop Powered Trace Input power 14-32 VDC
Oxygen Transmitter:
Series 2510 Trace Oxygen Input power 115/230 VAC,
Transmitter: 50-60 Hz, or 24 VDC.
Loop Resistance: 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 Pressure 0.1 to 1.5 psig
Limits: (0.007 to 0.1 kg/cm2).
CONSTRUCTION
Enclosure: Polycarbonate, rated
NEMA 4X (IP66) without
optional equipment.
NEMA 7 (explosion proof) optional.
Dimensions: 6.5 in. (165.1 mm) height
7.0 in. (177.8 mm) width
3.9 in.(99.06 mm) depth.
Note: All dimensions are without
optional equipment
Gas Connections: Quick connect 1/4” OD for plastic
tubing or stainless steel compression
ttings for installations with metal
sample lines.
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