Percent Oxygen Measurement – Series 2500/2510

Percent Oxygen Measurement

The Series 2500 and 2510 Percent Oxygen Transmitters are blind transmitters designed to provide exceptional performance, accuracy, and stability. Percent oxygen measurement ranges are available from 0-2% to 0-100%.

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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

Patented Extended Life Sensor

Eliminates Frequent Sensor Replacement

Acid Gas Resistant Sensor

Eliminates Sample Conditioning for Many Applications


  • Measurement Ranges in Percent 0-2, 0-5, 0-10, 0-25, 0-50, and 0-100
  • Accuracy¹: ±1% of full scale (± 5% of full scale on ranges ≤ 0-5%)
  • 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.


  • Series 2500 Loop Powered Trace Oxygen Transmitter Input power 14-32 VDC
  • Series 2510 Trace Oxygen Transmitter: Input power 115/230 VAC, 50-60 Hz, or 24 VDC.
  • Loop Resistance: 600 ohms @ 24 VDC (consult factory for other resistance values)


  • 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 Limits: 0.1 to 1.5 psig (0.007 to 0.1 kg/cm2)


  • 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 fittings for installations with metal sample lines.


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, flow meters, sample filters, and explosion proof (NEMA 7) housings.

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. Also, available in optional 24VCD. : In addition to the optional equipment mentioned above, the Series 2510 can be equipped with sample pumps and flowmeters.

The Series 2500 and Series 2510 Percent Oxygen Transmitters 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 associated with sensors that require periodic electrolyte maintenance.