Model 3300PA

Percent Oxygen Analyzer​​​


The 3300 series of low cost, microprocessor-based instrument are specially designed to satisfy industry’s need for a simple yet highly reliable process analyzer. These units offer excellent accuracy, ease of use, high reliability, low maintenance and a variety of standard features usually found on more expensive instruments.

Multiple Configurations

This series is a cost-effective solution to many process applications. With three different sensing technologies to choose from and multiple design configurations, a customized unit for a given application is easily secured. Sensing ranges are varied based on the oxygen sensor and technology used. All units come with an auto-ranging   capability and a 0-25% calibration range. Fully adjustable high or low concentration alarms provide the versatility to satisfy nearly any requirement.

Outputs for Data Transmission

A standard 0-10 VDC output provides range identification, while the oxygen concentration is output through 4-20 mADC negative ground and 0-10 VDC negative ground signals. An optional unidirectional RS-232 serial interface can be incorporated to relay information to a host computer for remote monitoring, making information and analysis results as close as a personal computer.

Sensing Technologies

The 3300 Series is available with three sensing technologies, each with their own benefit.

Micro-fuel Cell - 3300T, 3300P

  • Disposable, no maintenance sensor design

  • Specific to oxygen

  • Linear from 0-100% O2

  • Absolute zero (no O2, no output); single point calibration only

  • Unaffected by hydrocarbons, H2 or CO2

  • Easy to handle, inexpensive and easy to replace

  • Can apply to ppb, ppm and percent ranges

Zirconium Oxide - 3300Z

  • Quick response time

  • Long life / service in clean, non-corrosive streams

  • No shelf life concerns

  • Can be applied on a wide variety of applications 

Paramagnetic - 3300M

  • Long life / service in clean gas streams

  • High accuracy

  • Can be applied on corrosive, high temperature

Additional Advantages

  • Customer selectable ranges

  • Auto ranging capabilities

  • Fully adjustable high or low alarms set-points with corresponding relay contacts

  • Digital interface allows monitoring from a remote station

  • Sensor failure alarm​


  • Two ranges, with auto-ranging capability;

    • ​Field configurable between 0-1% and 0-25% O2

  • Signal outputs:

    • For oxygen concentration: 4-20 mADC negative ground and 0-10 

  • VDC signals

    • ​​For range identification: 0-10 VDC

  • Alarm outputs: Two user configurable set points with corresponding relay contacts

  • One sensor failure alarm

  • Display: 4 digit LED

  • Principle: Oxygen specific* electrochemical transducer

  • Sensor type: Micro-fuel Cell Class I-22; expected life, 3 years

  • Sample and span control valve and flow meter

  • Sampling system wetted parts brass and nylon with 1/4” tube connections or 6 mm adapters

  • Universal AC power supply: 100-240 VAC, 47-440 Hz; 10 watts maximum​



0-1 to 0-25% oxygen (0-3% and 0-10% default)

​Calibration Range

​0 to 25% O2

​Range ID

​0-10 VDC


​4 digit LED


​± 2% FS at constant temperature
± 5% FS over operating temperature (once temperature equilibrium has been reached)
Higher accuracy is available for special configurations

​Response Time

​90% in less than 10 seconds at 77°F (25°C)


​32° to 122°F (0° to 50°C); special temperature ranges available


​For oxygen concentrations: 4-20 mADC negative ground and 0-10 VDC signals
For range identification: 0-10 VDC signal


​Two fully adjustable high or low alarms; one sensor fail relay (all alarms are fail-safe)


​Universal AC 85-265 VAC, 47-63 Hz

​Sampling System

​Various options available. Please contact factory


​1/4 inch or 6 mm - user specified

​Oxygen Sensor

Micro-Fuel Cell; Class I-22



​File Size​

Model 3300 Series Brochure​


Model 3300​PA Manual​